Naukovi notatky
type: channel
description: “Naukovi Notatki” is a peer-reviewed, open-access journal (Category B) that publishes review articles and the results of original fundamental and applied research in the field of “Mechanical Engineering and Machine Building.” Scientific papers are published in the following specialties: G8 Materials Science; G9 Applied Mechanics; G11 Mechanical Engineering (by specialization)
publisher: Луцький національний технічний університет
language: en
publication name: Naukovi notatky
issn: 2415-3966
items: RESEARCH ON THE MECHANICAL PROPERTIES AND HEAT RESISTANCE OF PLASTICIZED EPOXY COMPOSITES WITH MICROADDITIONALS
items: SYNTHESIS MODES OF CONVERSION PLASMA-ELECTROLYTIC COATINGS ON ZIRCONIUM BASIS AND THEIR CORROSION PROPERTIES
items: INVESTIGATION OF DEFECTS AND DAMAGE IN TIMBER TRUSSES
items: FORMATION OF A MODEL FOR DETERMINING STRESSES IN METAL STRUCTURES UNDER THE INFLUENCE OF HYDROGEN CONCENTRATION
items: COMPARATIVE ANALYSIS OF MACHINE LEARNING MODELS FOR PREDICTING CONCRETE COMPRESSIVE STRENGTH
items: DETERMINATION OF THE IMPACT OF CLOSED-TYPE IMPELLER DESIGN ON THE EFFICIENCY OF INDUSTRIAL HEMP SEED SHELLING
items: DEVELOPMENT OF AN ADAPTIVE UAV CONTROL METHOD BASED ON DEEP REINFORCEMENT LEARNING AND DOMAIN RANDOMIZATION
items: STUDY OF MECHANICAL PROPERTIES AND STRUCTURE OF BIOMPOSITS FILLED WITH COFFEE GROUNDS
items: THE INFLUENCE OF METAKAOLIN COMPOSITION ON THE PROPERTIES OF THERMOPERLITE-BASED GEOPOLYMER COMPOSITES
items: REGULARITIES OF FORMING CUTTING PRESSURE ON THE AXIS OF THE ASSISTING GAS JET DURING GAS LASER CUTTING
items: ANALYTICAL METHOD FOR CALCULATING BENDING OF BEAMS OF VARIABLESTIFFNESS ON A NON-UNIFORM ELASTIC FOUNDATION
items: STATISTICAL ANALYSIS OF THE IMPACT OF ARCHITECTURAL DESIGN ON USERS’ PSYCHOLOGICAL STATE
items: DEVELOPMENT OF A MULTI-STAGE INNOVATIVE TECHNOLOGY FOR COMBINED CLEANING OF MINIATURE AND PRECISION BALL BEARINGS
items: RESULTS OF RESEARCH ON THE MATHEMATICAL MODEL OF AN AXIAL-PISTON HYDRAULIC MACHINE WITH A DEFECT IN THE PISTON PART
items: PROSPECTS OF PRE-HARVEST MONITORING OF FLAX CROPS USING UNMANNED AERIAL VEHICLES
items: MODELING THE PLASTIC BEHAVIOR OF A POROUS MATERIAL WITH AN INVERSE OPAL STRUCTURE AT LARGE DEFORMATION
items: АUTOMATED DESIGN OF ELECTRICAL SYSTEMS IN THE FOOD INDUSTRY: SOLIDWORKS ELECTRICAL, EPLAN ELECTRIC P8 AND AUTOCAD ELECTRICAL
items: FUNCTIONAL ROLE OF DIVIDERS IN HARVESTING LODGED FLAX
items: SOME ASPECTS OF THE THEORY OF DEFECT ANNEALING IN IRRADIATED CdSb CRYSTALS
items: CHECKING THE COMPATIBILITY OF THE PRINCIPLES OF THE SPECIAL THEORY OF RELATIVITY
items: DETERMINATION OF THE CAPACITY OF A COMBINED COMPENSATOR BY THE OPERATION OF THE SOLUTION ACCUMULATION OF A SINGLE-PISTON HYDRAULIC MORTAR PUMP
items: BUILDING A FASHION BRAND BASED ON SUSTAINABLE DEVELOPMENT PRINCIPLES
items: SUBSTITUTION OF THE LIMIT STATE CRITERIUM OF GAS PIPELINE STEEL DURING THEIR REPROFILING FOR HYDROGEN
items: FE SIMULATIONS OF THE STATIC DEFORMED STATE OF ATHEROSCLEROTIC VESSELS BASED ON OCT IMAGE DATA
items: RESEARCH OF THE STRUCTURE OF EPOXY COMPOSITES BY OPTICAL MICROSCOPY AND IR-SPECTRAL ANALYSIS
items: STRETCHING OF A PLATE WITH A HOLE AND A RADIAL CRACK, THE CONTINUATION OF WHICH FORMED PLASTIC ZONES USING TRESCA-SAINT-VENANT PLASTICITY CONDITION
items: PROBABILISTIC MODELS FOR THE ANALYSIS AND PREDITION OF THE DURABILITY OF ARCHITECTURAL STRUCTURES
items: STRUCTURE OF HIGH-ENTROPY AlNiCrTiB ALLOY AFTER HIGH-SPEED ELECTRON-BEAM HEAT TREATMENT
items: ВПЛИВ ВМІСТУ ВОЛЬФАРМУ НА ЗАКОНОМІРНОСТІ ФОРМУВАННЯ МІКРОСТРУКТУРИ ТА ФАЗОВОГО СКЛАДУ ПОРОШКІВ СПЛАВУ WXFECONI ПІД ЧАС МЕХАНІЧНОГО ЛЕГУВАННЯ
items: ANALYSIS OF THERMOMECHANICAL COMPATIBILITY OF PHASES IN MULTILAYER MOSI2–MEB2–(TI, MO) COATINGS

RESEARCH ON THE MECHANICAL PROPERTIES AND HEAT RESISTANCE OF PLASTICIZED EPOXY COMPOSITES WITH MICROADDITIONALS
type: item
description: The article investigates the influence of microfillers on the mechanical and thermophysical properties of epoxy composites based on plasticized resin DER 331. As microfillers, chromium oxide Cr₂O₃ powders (20 μm) andsilicon carbide SiC (40 μm) were used with a content of 5 to 20 wt%. Mechanical properties were investigated: fracture stress and modulus of elasticity during bending, impact strength. Additionally, heat resistance tests of the developed materials were conducted. Comparative analysis of the effect of microfillers confirms the advantage of using chromium oxide compared to silicon carbide for improving the properties of epoxy composites. At a concentration of 10 wt.% chromium oxide provides 6.4% higher strength of materials (85.2 MPa vs. 80.1 MPa) and 17.6% higher modulus of elasticity (4 GPa vs. 3.4 GPa) compared to composites filled with silicon carbide. This advantage is due to better adhesion to the matrix and the ability to form physical, covalent and ionic bonds at the interface. The best results are characteristic of the material with chromium oxide, which at a content of 15 wt.% provides the formation of CM with values of tensile strength (88.3 MPa), elastic modulus (4.2 GPa) and heat resistance (364 K). The mechanism of improving the properties is that microdispersed particles form a structural framework that creates barriers to crack propagation (i.e., cohesive strengthening of the material occurs). For composites with Cr₂O₃, the formation of additional physicochemical bonds with the matrix is also key, which ensures the thermal stability of new materials.
subject: Статті
  topic: section
subject: epoxy composite
  topic: keywords
subject: mechanical and thermophysical properties
  topic: keywords
subject: fillers
  topic: keywords
subject: polymer
  topic: keywords
subject: coating
  topic: keywords
subject: plasticizer
  topic: keywords
creator: А. V. Buketov
creator: V. Yu. Strelchenko
creator: О. V. Totosko
creator: V. V. Sotsenko
creator: D. V. Zhytnyk
creator: О. M. Bezbakh
creator: E. S. Appazov
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 295
ending page: 299
doi: 10.36910/775.24153966.2025.84.45

SYNTHESIS MODES OF CONVERSION PLASMA-ELECTROLYTIC COATINGS ON ZIRCONIUM BASIS AND THEIR CORROSION PROPERTIES
type: item
description: The aim of the work was to conduct a spectral analysis of electrolytic plasma. It was established that the plasma temperature in which the high-temperature oxide is formed is 8000 500 K. The influence of the electrolyte composition and the ratio of current densities on the electrophysical parameters of plasma-electrolytic oxidation was investigated. During the research, a study of corrosion resistance in such an aggressive environment as 10% HCl was conducted. As a result of the experiments, it was found that the obtained oxide-ceramic coatings are characterized by high microhardness and corrosion resistance.
subject: Статті
  topic: section
subject: plasma electrolytic oxidation
  topic: keywords
subject: oxide ceramic coatings
  topic: keywords
subject: protective coatings
  topic: keywords
subject: microstructure
  topic: keywords
subject: corrosion properties
  topic: keywords
subject: surface treatment
  topic: keywords
creator: N.Yu. Imbirovych
creator: Yu. V. Shyshko
creator: V.V. Tkachuk
creator: I. V. Boiarska
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 289
ending page: 294
doi: 10.36910/775.24153966.2025.84.44

INVESTIGATION OF DEFECTS AND DAMAGE IN TIMBER TRUSSES
type: item
description: The identification of defects and their timely remediation in structures in service constitute a key factor in ensuring the durability and reliability of buildings and civil engineering structures. This study presents the results of investigations of timber trusses that have been in long-term service. The most common defects and damage affecting truss members during operation are analysed. The research is based on the examination of ten different structures incorporating timber trusses with various geometric configurations. A statistical analysis of the frequency of occurrence of the identified defects and damage was carried out. The detected defects were compared with the defect classifications specified in relevant regulatory documents. The results indicate that almost all defect types listed in the regulatory literature are observed in structures employing timber trusses. In addition to the defects identified in the standards, additional types of damage were detected, including contamination of timber structural elements with bird droppings. Furthermore, a significant deficiency of timber trusses in service is the lack of documentation and the absence of systematic application of protective treatments. Of the defects identified, prolonged and repeated moisture exposure was found to have the most adverse impact on timber truss members, promoting fungal activity and subsequent wood decay. Decay of timber, especially in joint regions, results in a substantial reduction in the service life of timber trusses. The results of the study indicate that the most prevalent defects in timber truss members are longitudinal cracking due to wood shrinkage and corrosion of metal components in joint connections. The next most prevalent defect observed in timber trusses is the lack of information regarding treatment with protective agents (antiseptics and fire retardants). Given the frequent occurrence of timber infestation by wood-boring insects, as well as the necessity to comply…
subject: Статті
  topic: section
subject: Wood
  topic: keywords
subject: stress-strain state
  topic: keywords
subject: caring capacity
  topic: keywords
subject: deformation
  topic: keywords
subject: wooden structures
  topic: keywords
subject: wooden trusses
  topic: keywords
subject: efects of wooden structures
  topic: keywords
creator: A. P. Pavluk
creator: Y.Y. Ziatiuk
creator: V.V. Supruniuk
creator: M.M. Скрипник
creator: R.V. Pasichnyk
creator: S.V. Rotko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 282
ending page: 288
doi: 10.36910/775.24153966.2025.84.43

FORMATION OF A MODEL FOR DETERMINING STRESSES IN METAL STRUCTURES UNDER THE INFLUENCE OF HYDROGEN CONCENTRATION
type: item
description: In modern industrial conditions, the issue of accurately predicting the operational resources of metal systems, in particular their durability and reliability, is becoming particularly acute. This is due to the complex combination of material corrosion degradation and constant mechanical stress. To date, the mechanisms of the relationship between hydrogen saturation and stress redistribution in metals have been studied fragmentarily. The process of hydrogen absorption causes deformation of the body structure, which manifests itself in a change in its linear parameters and total volume. Under appropriate conditions, such volumetric transformations become a source of internal forces. This paper considers a model in which the mutual influence of hydrogen atoms is considered negligible. The key objective of the study is to determine the parameters of the stress-strain state of an object resulting from the diffusion and accumulation of hydrogen in its structure.
subject: Статті
  topic: section
subject: structures
  topic: keywords
subject: deformations
  topic: keywords
subject: stress
  topic: keywords
subject: hydrogen concentration
  topic: keywords
subject: finite element method
  topic: keywords
subject: solid cylinder
  topic: keywords
subject: cylindrical
  topic: keywords
creator: Yu.Yu. Zhiguts
creator: V.D. Rudj
creator: І.М. Shkirta
creator: M.G. Stashchuk
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 277
ending page: 281
doi: 10.36910/775.24153966.2025.84.42

COMPARATIVE ANALYSIS OF MACHINE LEARNING MODELS FOR PREDICTING CONCRETE COMPRESSIVE STRENGTH
type: item
description: This paper addresses the problem of predicting concrete compressive strength based on mixture composition using machine learning methods. A comparative analysis of linear regression, polynomial regression, artificial neural networks, and ensemble learning techniques was conducted using the publicly available Concrete Compressive Strength dataset. The results show that simple linear models are unable to adequately capture the complex non-linear physicochemical processes of cement hydration, while ensemble-based approaches provide a superior balance between accuracy and robustness. The best stable performance was achieved by the Random Forest algorithm, with a mean absolute error of 3.73 MPa. In addition, an empirical power-law formula was derived through linearization of a multiplicative model, enabling approximate strength estimation without computational resources. The findings confirm the effectiveness of ensemble and hybrid modeling approaches for practical engineering applications in construction materials science.
subject: Статті
  topic: section
subject: concrete compressive strength
  topic: keywords
subject: machine learning
  topic: keywords
subject: regression analysis
  topic: keywords
subject: Random Forest
  topic: keywords
subject: neural networks
  topic: keywords
creator: N.R. Pechonchyk
creator: O.S. Prykhodko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 271
ending page: 276
doi: 10.36910/775.24153966.2025.84.41

DETERMINATION OF THE IMPACT OF CLOSED-TYPE IMPELLER DESIGN ON THE EFFICIENCY OF INDUSTRIAL HEMP SEED SHELLING
type: item
description: The article presents the results of a study on the efficiency of the centrifugal dehulling method for industrial hemp seeds using a device equipped with a closed-sector impeller with four profiled radial channels. At an impeller rotational speed of 6000±200 rpm, the kernel yield in the first three cycles was 9.27%, 12.75%, and 7.86%, respectively, whereas the fourth and fifth cycles produced only 3.54% and 1.39%. The decrease in yield at later stages is explained by the increased strength of the seed hulls remaining after the previous cycles. The share of unhulled seeds gradually decreased from 71.24% after the first cycle to 1.90% after the fifth. The results indicate that limiting the number of dehulling cycles to three is advisable, as it significantly reduces operating costs without reducing kernel yield. The geometry of the radial channels (20×20 mm, 44 mm long), combined with a rotational speed of 6000 rpm, provided sufficient centrifugal acceleration for effective dehulling. Within the tested design, the configuration with four channels was recognized as a technically justified solution for the basic setup.
subject: Статті
  topic: section
subject: hemp seeds
  topic: keywords
subject: kernel
  topic: keywords
subject: centrifugal dehuller
  topic: keywords
subject: impeller
  topic: keywords
subject: processing efficiency
  topic: keywords
creator: V. Sheichenko
creator: D. Petrachenko
creator: D. Sheichenko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 263
ending page: 270
doi: 10.36910/775.24153966.2025.84.40

DEVELOPMENT OF AN ADAPTIVE UAV CONTROL METHOD BASED ON DEEP REINFORCEMENT LEARNING AND DOMAIN RANDOMIZATION
type: item
description: The paper addresses the problem of creating an adaptive control system for an unmanned aerial vehicle (UAV) to operate under conditions of stochastic uncertainty. An approach based on the Proximal Policy Optimization (PPO) algorithm using a domain randomization strategy for environmental parameters is proposed. A neural network structure and a reward function have been developed to ensure a balance between navigation accuracy and energy efficiency. The developed controller demonstrated the ability to adapt to payload mass changes (up to 20%) and external wind disturbances without the need for manual coefficient retuning. Comparative simulation results confirm the advantage of the proposed method over a classical PID controller: stabilization time is reduced by 1.5 times, and maximum deviation during disturbances is reduced by 40%.
subject: Статті
  topic: section
subject: UAV
  topic: keywords
subject: reinforcement learning
  topic: keywords
subject: PPO
  topic: keywords
subject: adaptive control
  topic: keywords
subject: domain randomization
  topic: keywords
subject: flight dynamics
  topic: keywords
creator: V.L. Zakrevskyi
creator: O.S. Prykhodko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 257
ending page: 262
doi: 10.36910/775.24153966.2025.84.39

STUDY OF MECHANICAL PROPERTIES AND STRUCTURE OF BIOMPOSITS FILLED WITH COFFEE GROUNDS
type: item
description: В статті досліджено міцність на стискання біокомпозитних матеріалів на основі глютинової матриці та кавової гущі залежно від вмісту наповнювача та ступеня підсушування композиції. Визначено міцність на стискання біокомпозитів залежно від концентрації біополімерної матриці, вмісту композиції в прес-формі, температури основної термічної обробки та додаткової термічної обробки. Досліджено, що максимальну міцність на стискання 79,6 МПа мають біокомпозитні матеріали із ступенем підсушування 20%. Також досліджено мікроструктуру біокомпозитів оптимального складу (вміст кавової гущі в кількості 200 мас. ч.) зі ступенем підсушування композиції 20%.
subject: Статті
  topic: section
subject: розчин глютину
  topic: keywords
subject: кавова гуща
  topic: keywords
subject: міцність на стискання
  topic: keywords
subject: термічна обробка
  topic: keywords
subject: ступінь підсушування
  topic: keywords
subject: структура
  topic: keywords
creator: О. Sadova
creator: V. Kashytskyi
creator: D. Husachuk
creator: M. Vyshynskyi
creator: Ye. Chernota
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 249
ending page: 256
doi: 10.36910/775.24153966.2025.84.38

THE INFLUENCE OF METAKAOLIN COMPOSITION ON THE PROPERTIES OF THERMOPERLITE-BASED GEOPOLYMER COMPOSITES
type: item
description: Geopolymers are promising modern building materials, serving as an alternative to Portland cement-based concretes. Optimizing the chemical and granulometric composition of geopolymer components, particularly metakaolin, allows for controlling the hardening rate, increasing durability and mechanical properties, and adapting geopolymers to specific application conditions. This study analyzes metakaolin MK 40 and highly active metakaolin HAM, their chemical composition and particle distribution, as well as the influence of these factors on the properties of geopolymers.
subject: Статті
  topic: section
subject: highly active metakaolin HAM
  topic: keywords
subject: MK-40 metakaolin
  topic: keywords
subject: geopolymer
  topic: keywords
subject: aluminosilicates
  topic: keywords
subject: composites
  topic: keywords
subject: polymerization
  topic: keywords
creator: N. Polivoda
creator: M. Melnychuk
creator: I. Shevchuk
creator: Y. Babych
creator: V. Rud
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 241
ending page: 248
doi: 10.36910/775.24153966.2025.84.50

REGULARITIES OF FORMING CUTTING PRESSURE ON THE AXIS OF THE ASSISTING GAS JET DURING GAS LASER CUTTING
type: item
description: The results of theoretical and experimental studies of the cutting pressure of the assist gas formed by subsonic and supersonic jets when they are decelerated on the surface of a part during gas laser cutting are presented. The patterns of influence of the gas type (air/oxygen), pressure at the nozzle inlet, gap between the nozzle and the part on the gas jet structure, and the efficiency of melt removal have been established. The obtained accurate quantitative data are in good agreement with the basic features of gas dynamics of supersonic jets. The high accuracy of the proposed numerical model has been experimentally confirmed. A high level of correlation between the quality of the cut and the nature of the cutting pressure fluctuations on the jet axis has been demonstrated.
subject: Статті
  topic: section
subject: fiber laser
  topic: keywords
subject: numerical model
  topic: keywords
subject: gas-assisted laser cutting
  topic: keywords
subject: assist gas pressure
  topic: keywords
subject: nozzle
  topic: keywords
subject: gas jet
  topic: keywords
subject: shock wave structure
  topic: keywords
creator: S.P. Seredyuk
creator: V.V. Chudov
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 233
ending page: 240
doi: 10.36910/775.24153966.2025.84.37

ANALYTICAL METHOD FOR CALCULATING BENDING OF BEAMS OF VARIABLESTIFFNESS ON A NON-UNIFORM ELASTIC FOUNDATION
type: item
description: An analytical method for calculating beams of arbitrary continuous variable stiffness supported on a non-uniform continuous elastic Winkler foundation has been developed. The classical problem of calculating the bending of beams of constant stiffness supported on a constant elastic Winkler foundation is well studied. However, the assumption of the homogeneity of the foundation is far from reality and for more qualitative studies it is necessary to take into account the heterogeneity (variability) of the foundation. In this case, the bed coefficient will be variable along the beam axis, which significantly complicates the solution of the corresponding differential equation. The problem becomes even more complicated when not only the bed coefficient, but also the stiffness of the beam is variable. This is the case that this article is devoted to. The heterogeneity of the foundation is characterized by a variable linear bed coefficient, which can be any continuous function. The method is based on the exact solution of the corresponding differential equation with variable coefficients. In closed form, calculation formulas for the parameters of the stress-strain state of the beam are given. The calculation for the bending of a concrete beam in the form of a truncated wedge resting on an exponentially varying elastic base is given.
subject: Статті
  topic: section
subject: beam
  topic: keywords
subject: variable stiffness
  topic: keywords
subject: inhomogeneous foundation
  topic: keywords
subject: Winkler hypothesis
  topic: keywords
subject: analytical method
  topic: keywords
creator: Yu. S. Krutii
creator: M. H. Surianinov
creator: A. O. Perperi
creator: V. V. Vakulenko
creator: V. M. Mytynskyi
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 218
ending page: 232
doi: 10.36910/775.24153966.2025.84.36

STATISTICAL ANALYSIS OF THE IMPACT OF ARCHITECTURAL DESIGN ON USERS’ PSYCHOLOGICAL STATE
type: item
description: This paper presents a statistical analysis of the impact of architectural design on users’ psychological well-being using A/B testing, a methodological approach introduced by the author. The study relies on synthetic datasets generated in Python and informed by empirical patterns reported in contemporary literature on A/B testing and environmental psychology. Three architectural parameters—color schemes, lighting type, and spatial configuration—were examined to determine their influence on stress, emotional comfort, and cognitive performance. Statistical techniques including t-tests, ANOVA, and regression modelling were applied. The results show that cool colors, natural lighting, and open layouts positively affect psychological well-being. These findings demonstrate the importance of incorporating evidence-based statistical methods into architectural design practice.
subject: Статті
  topic: section
subject: architectural design
  topic: keywords
subject: psychological well-being
  topic: keywords
subject: A/B testing
  topic: keywords
subject: emotional comfort
  topic: keywords
subject: stress
  topic: keywords
subject: lighting
  topic: keywords
subject: environmental color
  topic: keywords
creator: I. V. Samonenko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 213
ending page: 217
doi: 10.36910/775.24153966.2025.84.35

DEVELOPMENT OF A MULTI-STAGE INNOVATIVE TECHNOLOGY FOR COMBINED CLEANING OF MINIATURE AND PRECISION BALL BEARINGS
type: item
description: The article presents the development of a multi-stage technology for combined cleaning of miniature and precision rolling bearings, which was developed based on the results of comprehensive experimental studies of miniature and precision ball bearings with an outer diameter of up to 30 mm (classes P4/P2). Such bearings are critical elements of high-tech mechanical systems, which is especially relevant in the aviation, space and special high-precision industries. For miniature rolling bearings, the need to achieve the 12th class of cleanliness according to ISO 16232, where the remaining particles of contaminants with a size of ≥ 5 μm do not exceed 60 pieces, has been established as a critical condition for ensuring operational characteristics. It has been experimentally established that when developing a cleaning technology, the optimal cleaning angle should be 30o–45o, and the rotation speed should be 500 rpm. During the development, technological parameters were optimized, including: magnetic separation (0.5 T), dual-frequency ultrasonic cleaning in a turbulent flow of solvent D-60, final washing with Heptane using vacuum drying. The confirmed cleaning efficiency η ≈ 96.7% ensures the preservation of vibroacoustic parameters and economic feasibility by avoiding expensive operational failures.
subject: Статті
  topic: section
subject: technology
  topic: keywords
subject: combined cleaning
  topic: keywords
subject: miniature and precision bearings
  topic: keywords
subject: vibration diagnostics
  topic: keywords
creator: R.E. Kostyunik
creator: О.О. Mikosyanchyk
creator: S.P. Shymchuk
creator: O.G. Kovalchuk
creator: O.V.
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 208
ending page: 212
doi: 10.36910/775.24153966.2025.84.34

RESULTS OF RESEARCH ON THE MATHEMATICAL MODEL OF AN AXIAL-PISTON HYDRAULIC MACHINE WITH A DEFECT IN THE PISTON PART
type: item
description: The paper presents research on a mathematical model of an axial piston hydraulic machine with a defect in the piston part with specified defect dimensions.
subject: Статті
  topic: section
subject: mathematical model
  topic: keywords
subject: axial-piston hydraulic machine
  topic: keywords
subject: piston part
  topic: keywords
subject: hinge
  topic: keywords
subject: defect
  topic: keywords
subject: spectrum
  topic: keywords
subject: vibration acceleration
  topic: keywords
subject: gap
  topic: keywords
subject: frequency
  topic: keywords
subject: peak
  topic: keywords
subject: amplitude
  topic: keywords
creator: E.L. Seleznov
creator: D.E. Seleznov
creator: V.S. Matviichuk
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 205
ending page: 207
doi: 10.36910/775.24153966.2025.84.33

PROSPECTS OF PRE-HARVEST MONITORING OF FLAX CROPS USING UNMANNED AERIAL VEHICLES
type: item
description: Modern agricultural monitoring approaches require increased efficiency and accuracy in assessing crop conditions during the pre-harvest period. This paper presents an algorithm for comprehensive assessment of the flax crop stand condition prior to harvesting, based on the integration of data obtained using unmanned aerial vehicles and results from traditional field and laboratory measurements. A mathematical model of an integrated indicator describing the flax crop stand condition is developed, incorporating key agronomic, technological, and biological parameters. Furthermore, an approach for generating digital field maps with mapped values of the integrated crop stand condition index is proposed, enabling visualization of the quality of the flax crop stand within fields. The resulting information enables well-founded decisions on optimal harvesting dates, selection of appropriate harvesting technologies, and optimization of harvesting machinery settings. The proposed methodology is applicable to both fiber flax and oilseed flax and contributes to improving harvesting efficiency and overall crop management.
subject: Статті
  topic: section
subject: flax harvesting
  topic: keywords
subject: agromonitoring
  topic: keywords
subject: unmanned aerial vehicles (UAVs)
  topic: keywords
subject: drones
  topic: keywords
creator: І.М. Dudarev
creator: A.V. Khomych
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 198
ending page: 204
doi: 10.36910/775.24153966.2025.84.32

MODELING THE PLASTIC BEHAVIOR OF A POROUS MATERIAL WITH AN INVERSE OPAL STRUCTURE AT LARGE DEFORMATION
type: item
description: By means of finite element modeling on a representative cell, the process of irreversible plastic deformation of a porous material with an inverse opal structure was investigated up to the moment when the pore structure becomes almost completely closed. This is important for predicting the preservation of the adsorption and chemical-catalytic functional properties of inverse opal materials during operation and pressure treatment. It was found that the structure of inverse opal retains permeable porous structure even under fairly large deformations. A significant discrepancy was found between the engineering yield criterion of 0.2% residual strain and the physical yield point.
subject: Статті
  topic: section
subject: metamaterials
  topic: keywords
subject: inverse opal
  topic: keywords
subject: unit cell
  topic: keywords
subject: plastic deformation
  topic: keywords
subject: permeable porous structure
  topic: keywords
subject: yield limit
  topic: keywords
creator: P. Korobko
creator: A. Kuzmov
creator: M. Shtern
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 192
ending page: 197
doi: 10.36910/775.24153966.2025.84.31

АUTOMATED DESIGN OF ELECTRICAL SYSTEMS IN THE FOOD INDUSTRY: SOLIDWORKS ELECTRICAL, EPLAN ELECTRIC P8 AND AUTOCAD ELECTRICAL
type: item
description: This article provides a comparative analysis of modern ECAD systems used for automated design of electrical circuits in the food industry. It examines the architecture and functionality of SolidWorks Electrical, EPLAN Electric P8, and AutoCAD Electrical, and provides practical examples of their use in manufacturing processes and educational institutions. SolidWorks Electrical provides ECAD/MCAD integration, EPLAN Electric P8 is characterized by a high level of standardization and automation, and AutoCAD Electrical is accessible and efficient for local control systems. The development prospects for ECAD solutions in the context of Industry 4.0 are identified, including integration with cloud services, IoT, and digital twins.
subject: Статті
  topic: section
subject: ECAD
  topic: keywords
subject: computer-aided design
  topic: keywords
subject: SolidWorks Electrical
  topic: keywords
subject: EPLAN Electric P8
  topic: keywords
subject: AutoCAD Electrical
  topic: keywords
subject: food industry
  topic: keywords
subject: Industry 4.0
  topic: keywords
creator: L. Fedik
creator: Yu. Fedorus
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 185
ending page: 191
doi: 10.36910/775.24153966.2025.84.30

FUNCTIONAL ROLE OF DIVIDERS IN HARVESTING LODGED FLAX
type: item
description: Lodged flax remains one of the most critical challenges in mechanized harvesting due to stem interlocking, ground-level deformation, and the high elasticity of flax stems. While the functional role of crop dividers in fiber flax pulling systems is well described in classical literature, little attention has been paid to their applicability in harvesting modern oilseed flax, whose increasing plant height and density lead to stem-flow behaviour similar to lodged fiber flax. This paper presents an analytical evaluation of divider designs, synthesizing findings from recent engineering studies and technical documentation. The mechanisms of stem separation, lifting forces, and controlled pre-bending are examined to clarify how divider affect feeding stability and harvesting quality. Particular emphasis is placed on comparing rigid and spring-loaded dividers and identifying their performance under varying lodging conditions. The analysis demonstrates that dividers significantly improve the completeness of stem capture, reduce bending-induced damage, and stabilize crop flow not only in fiber flax pulling but also in cutting-based oilseed flax systems. Design implications are formulated to guide the integration of divider into modern flax harvesters, including adjustable height settings, flexible mounting, optimized nose curvature, and low-friction surfaces. The findings highlight that crop dividers should be considered a functional component for both flax categories, with direct impact on harvesting efficiency, ribbon uniformity, and material preservation.
subject: Статті
  topic: section
subject: Flax harvesting
  topic: keywords
subject: Lodged flax
  topic: keywords
subject: Crop divider
  topic: keywords
subject: Fiber flax
  topic: keywords
subject: Oilseed flax
  topic: keywords
subject: Stem separation
  topic: keywords
subject: Stem bending
  topic: keywords
subject: Mechanical interaction
  topic: keywords
creator: O. Yaheliuk
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 177
ending page: 184
doi: 10.36910/775.24153966.2025.84.29

SOME ASPECTS OF THE THEORY OF DEFECT ANNEALING IN IRRADIATED CdSb CRYSTALS
type: item
description: The processes of formation and rearrangement of radiation defects during irradiation and annealing can be considered as a set of quasichemical reactions of different orders. Some of them are difficult to reduce to a form that would allow analyzing the time dependence of the defect concentration during annealing. An important parameter that determines the kinetics of defect annealing is the annealing activation energy. There are many methods for determining this energy. We used the cross-section method, which is based on the analysis of Arrhenius curves at different annealing temperatures. To determine the thermal stability region of radiation defects, the isochronal annealing method was used.
subject: Статті
  topic: section
subject: radiation defect
  topic: keywords
subject: irradiation
  topic: keywords
subject: annealing
  topic: keywords
subject: CdSb crystal
  topic: keywords
subject: activation energy
  topic: keywords
subject: diffusion
  topic: keywords
creator: O. Urban
creator: S. Fedosov
creator: L. Yashchynskyy
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 173
ending page: 176
doi: 10.36910/775.24153966.2025.84.27

CHECKING THE COMPATIBILITY OF THE PRINCIPLES OF THE SPECIAL THEORY OF RELATIVITY
type: item
description: The apparatus of the special theory of relativity (SR) is the basis for the study of both micro- and mega-world [1]. Astronomical observations and calculations, including the ΛCDM-model of the Universe [2], have revealed new types of matter - dark matter, which have no means of description in space-time. By means of precision measurements of the anisotropy of the cosmic microwave background (CMB), J. Smoot [3] reliably registered an unobservable directly distinguished direction in the Galaxy [4] . Additional study requires the violation of the principle of equivalence of by A. Einstein of the mass and energy particles in SR. Based on the results of these studies, one can assume the redundancy (or a broader interpretation) of some of the postulates of the SR, the re-verification of which is the purpose of this work. The paper [5] presents a comparison between the SR apparatus and test theories (including the Robertson and Mansouri-Sext theories), which are an extended Lorentz transformation [1] with additional parameters. It turned out that the theories used did not in any way dispute the SR. With the help of relativistic wave mechanics, P. Dirac showed [6] that the 4 momentum space of particles is adequate to relativistic mechanics. In [7], the approach proposed by P. Dirac was extended to another method for checking SR – in Euclidean 4 space, in which directly unobservable particles can also be described. It is shown that the reason for the discrepancy between the SR apparatus and the equivalence principle is the low dimension of the momentum space. Restrictions imposed by the law of conservation of energy on the principle of superposition of particle momentum are revealed, and the indeterminacy of particle interaction is pointed out. The uniqueness in relativistic mechanics of the selected reference system and the properties of dark particles of matter and energy is taken into account. It is shown that the use of the principle of general covariance leads to a diff…
subject: Статті
  topic: section
subject: principle of relativity
  topic: keywords
subject: rank of particles
  topic: keywords
subject: non-planar interactions
  topic: keywords
creator: R. Pasternak
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 166
ending page: 172
doi: 10.36910/775.24153966.2025.84.26

DETERMINATION OF THE CAPACITY OF A COMBINED COMPENSATOR BY THE OPERATION OF THE SOLUTION ACCUMULATION OF A SINGLE-PISTON HYDRAULIC MORTAR PUMP
type: item
description: Analysis of modern pumps indicates the search for ways to simplify their designs and improve the basic scheme of single-piston mortar pumps while minimizing pulsations in the pipeline during the transportation of building mortars. Reducing pressure pulsations in modern single-piston mortar pumps is ensured by the use of pressure compensators in the form of air caps of various volumes. But air compensators, while performing their function along with advantages, have significant disadvantages, namely: the volume of compressed air that is in direct contact with the pumped solution is intensively removed from the compensator during the operation of the mortar pump. Especially the intensity of air removal increases at the pressure of the solution supply (above 1.5 MPa). In this case, the useful volume of the compensator decreases, the efficiency of the solution accumulation of the compensator significantly decreases, and the degree of solution pulsations increases proportionally. The article analyzes the work and mathematically substantiates the determination of the useful volume based on the rules of gas behavior in the isothermal process of a new design of a combined compensator of increased efficiency in reducing the degree of pressure pulsations during pumping of mortars of different mobility by a hydraulically driven single-piston mortar pump.
subject: Статті
  topic: section
subject: mortar pump
  topic: keywords
subject: combined compensator
  topic: keywords
subject: degree of pressure pulsations
  topic: keywords
subject: free chamber
  topic: keywords
subject: closed chamber
  topic: keywords
subject: mortar
  topic: keywords
subject: pressure
  topic: keywords
subject: Boyle-Mariotte law
  topic: keywords
creator: V.G. Mykhailyk
creator: M.V. Shapoval
creator: A.I. Kryvorot
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 158
ending page: 165
doi: 10.36910/775.24153966.2025.84.25

BUILDING A FASHION BRAND BASED ON SUSTAINABLE DEVELOPMENT PRINCIPLES
type: item
description: The article examines the theoretical and practical foundations of building a fashion brand on the principles of sustainable development. It analyzes contemporary approaches to sustainable branding, including the concepts of slow fashion, the circular economy, and international environmental certification standards. The study summarizes behavioral factors that influence consumer loyalty to sustainable brands and identifies the key barriers to implementing sustainable practices in the fashion industry. Particular attention is paid to the characteristics of textile materials in terms of their environmental impact and recyclability. A comparative analysis of the recyclability of major fiber groups is presented, and design principles for sustainable garments are systematized, including modularity, repairability, zero-waste design, mono-materiality, and durability. Based on these principles, a men’s clothing collection was developed, demonstrating the practical application of eco-design solutions. The results show that integrating eco-friendly materials, responsible technologies, and carefully considered construction can improve functionality, reduce resource intensity, and extend the product life cycle. The study highlights the necessity of a holistic approach to sustainable branding that encompasses not only the product and materials, but also communication, production processes, consumer behavior, and business models.
subject: Статті
  topic: section
subject: sustainable branding
  topic: keywords
subject: circular economy
  topic: keywords
subject: ecodesign
  topic: keywords
subject: clothing modularity
  topic: keywords
subject: ecological footprint
  topic: keywords
creator: M.L. Riabchykov
creator: O.L. Tkachuk
creator: T.M. Holovenko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 151
ending page: 157
doi: 10.36910/775.24153966.2025.84.24

SUBSTITUTION OF THE LIMIT STATE CRITERIUM OF GAS PIPELINE STEEL DURING THEIR REPROFILING FOR HYDROGEN
type: item
description: Long-term operation of natural gas transmission pipelines causes a significant decrease in the initial mechanical characteristics of pipeline steels. The influence of operating conditions of hydrogen uptake by natural gas pipeline steels on their degradation in terms of resistance to brittle fracture is analyzed. The criterion for achieving a limit state of steels in terms of crack growth resistance considering the operational degradation, hydrogen charging conditions, gas pressure in the pipe and the presence of crack-like defects is substantiated. The obtained results can be used for assessment the serviceability of gas transit pipeline steels reprofiling for gaseous hydrogen transportation.
subject: Статті
  topic: section
subject: steel
  topic: keywords
subject: pipeline
  topic: keywords
subject: mechanical properties
  topic: keywords
subject: hydrogen
  topic: keywords
subject: degradation
  topic: keywords
subject: hydrogen concentration
  topic: keywords
subject: crack growth resistance
  topic: keywords
subject: J-integral
  topic: keywords
subject: semi-elliptical crack
  topic: keywords
subject: serviceability
  topic: keywords
creator: O. I. Venhryniuk
creator: O. I. Zvirko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 145
ending page: 150
doi: 10.36910/775.24153966.2025.84.23

FE SIMULATIONS OF THE STATIC DEFORMED STATE OF ATHEROSCLEROTIC VESSELS BASED ON OCT IMAGE DATA
type: item
description: This study focuses on the biomechanical modeling of atherosclerotic vessels to predict the risk of plaque rupture, a primary cause of acute cardiovascular events. A methodology integrating clinical Optical Coherence Tomography (OCT) imaging with Finite Element Analysis (FEA) is proposed. An automated Python-based algorithm was developed to reconstruct patient-specific geometries of vessel layers (intima, media, adventitia) and plaque components directly from OCT images. Numerical simulations were conducted for three different plaques cases under physiological pressure. The results revealed that maximum stresses are consistently localized at the plaque shoulders. The proposed approach provides a quantitative tool for assessing plaque vulnerability beyond geometric analysis.
subject: Статті
  topic: section
subject: atherosclerotic vessels
  topic: keywords
subject: FE
  topic: keywords
subject: Plaque
  topic: keywords
subject: stress strain state
  topic: keywords
creator: I.V. Hovorukha
creator: O.O. Larin
creator: I. V. Polivenok
creator: K. Ie. Potopalska
creator: N.O. Fomenko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 137
ending page: 144
doi: 10.36910/775.24153966.2025.84.22

RESEARCH OF THE STRUCTURE OF EPOXY COMPOSITES BY OPTICAL MICROSCOPY AND IR-SPECTRAL ANALYSIS
type: item
description: For the formation of polymer materials, the epoxy dian oligomer ED-20 was used, and its polymerization was performed using the amine hardener polyethylenepolyamine PEPA. The properties of epoxy composites were improved by using a mixture of discrete fibers based on polyester, viscose, and elastane, the content of which was varied within q = 0.25…2.00 wt.%. In this work, the nature of surface destruction in epoxy composites was investigated using optical microscopy, which enabled us to determine the interaction features between ingredients and the resistance of the developed materials to shock loads. Additionally, the interfacial interaction of the composite ingredients was investigated using the IR spectral analysis method. A change in the intensity parameters (T, %), relative peak area (S, %), as well as insignificant shifts in wave numbers (Δν, cm-1) was established, which corresponds to vibrations of the groups: -NН-, О-Н (ν = 3408 cm-1), С-Н, (ν = 2922…2848 cm–1), С=О (ν = 2019 cm–1), polyester component (ν = 1700 cm–1), С–О–С (ν = 1112…914 cm–1) and indicates structural transformations during polymerization of the composite ingredients.
subject: Статті
  topic: section
subject: epoxy oligomer ED-20
  topic: keywords
subject: hardener PEPA
  topic: keywords
subject: mixture of discrete fibers
  topic: keywords
subject: optical microscopy
  topic: keywords
subject: IR spectral analysis
  topic: keywords
creator: L.O. apronova
creator: V.V. Toropenko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 131
ending page: 136
doi: 10.36910/775.24153966.2025.84.21

STRETCHING OF A PLATE WITH A HOLE AND A RADIAL CRACK, THE CONTINUATION OF WHICH FORMED PLASTIC ZONES USING TRESCA-SAINT-VENANT PLASTICITY CONDITION
type: item
description: The work presents a solution to the problem of the stretching of an infinite isotropic plate with a circular hole and a radial through straight crack. It was assumed that under the action of an external load at infinity, on the crack extension the plastic zones are formed, modeled using Tresca-Saint-Venant plasticity conditions. The solution of the problem is built using the method of the theory of functions of a complex variable and complex potentials and is reduced to a system of singular integral equations, which is numerically solved using the method of mechanical quadrature. A numerical analysis of the problem is conducted and graphic dependencies of the length of the plastic zones and applied external loads were constructed
subject: Статті
  topic: section
subject: plate
  topic: keywords
subject: crack
  topic: keywords
subject: plastic zones
  topic: keywords
subject: complex potentials
  topic: keywords
subject: linear conjugation problem
  topic: keywords
subject: singular integral equations
  topic: keywords
creator: M.S. Slobodian
creator: M.I. Shaynoga
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 125
ending page: 130
doi: 10.36910/775.24153966.2025.84.20

PROBABILISTIC MODELS FOR THE ANALYSIS AND PREDITION OF THE DURABILITY OF ARCHITECTURAL STRUCTURES
type: item
description: This paper examines the application of probabilistic models for the analysis and prediction of the durability of architectural structures under uncertainty in material properties and operational conditions. The research methodology is based on reliability theory and time-to-failure analysis, with particular emphasis on the Weibull and lognormal distributions, which are widely used to describe degradation processes in building materials and structural systems. The study employs synthetic datasets generated on the basis of empirical results reported in previous investigations of the durability of concrete and structural materials. Structural reliability methods and Monte Carlo simulation are applied to estimate failure probabilities and to predict the service life of architectural objects. The results demonstrate the effectiveness of the probabilistic approach for quantitative assessment of degradation risks and enable the estimation of expected service life while accounting for the variability of influencing factors. The proposed methodology can be used as a decision-support tool in the design process and in the reliability assessment of architectural structures.
subject: Статті
  topic: section
subject: probabilistic models
  topic: keywords
subject: durability of architectural structures
  topic: keywords
subject: structural reliability
  topic: keywords
subject: Weibull distribution
  topic: keywords
subject: lognormal distribution
  topic: keywords
subject: time-to-failure analysis
  topic: keywords
subject: Monte Carlo simulation
  topic: keywords
creator: I. V. Samonenko
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 119
ending page: 124
doi: 10.36910/775.24153966.2025.84.19

STRUCTURE OF HIGH-ENTROPY AlNiCrTiB ALLOY AFTER HIGH-SPEED ELECTRON-BEAM HEAT TREATMENT
type: item
description: In this study, the structure and phase composition of lightweight high-entropy AlNiCrTiB alloy produced by mechanical alloying followed by electron-beam treatment were investigated. The in-situ formation of TiB and Cr2B3 boride phases during high-temperature exposure was confirmed. It was shown that remelting of the surface layer leads to the formation of a metallic matrix containing large, , edged boride inclusions, whereas more uniform heating at lower temperatures promotes the growth of finely dispersed TiB particles through the interaction of titanium with boron. A thin TiB-enriched transition layer forms between the remelted surface and the inner regions, facilitating the development of a homogeneous composite structure composed of a metallic matrix reinforced with dispersed boride inclusions.
subject: Статті
  topic: section
subject: high-entropy alloy
  topic: keywords
subject: low density
  topic: keywords
subject: composite
  topic: keywords
subject: boride inclusions
  topic: keywords
subject: structure
  topic: keywords
subject: mechanical alloying
  topic: keywords
subject: electron beam treatment
  topic: keywords
creator: S. O. akonechnyi
creator: O. I. Yurkova
creator: P. I. Loboda
creator: Y. I. Bogomol
creator: I. Y. Trosnikova
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 111
ending page: 118
doi: 10.36910/775.24153966.2025.84.18

ВПЛИВ ВМІСТУ ВОЛЬФАРМУ НА ЗАКОНОМІРНОСТІ ФОРМУВАННЯ МІКРОСТРУКТУРИ ТА ФАЗОВОГО СКЛАДУ ПОРОШКІВ СПЛАВУ WXFECONI ПІД ЧАС МЕХАНІЧНОГО ЛЕГУВАННЯ
type: item
description: This work investigates the synthesis of heavy high-entropy alloys WₓFeCoNi (x = 1, 1.5, 2) produced by mechanical alloying in a gasoline medium. It is shown that the equiatomic alloy WFeCoNi forms a dual-phase BCC/FCC structure without intermetallic compounds, whereas increasing the tungsten content to x = 1.5 reduces the configurational mixing entropy and enhances phase segregation. For the composition x = 2, the formation of tungsten carbide (WC) is established, resulting from the exceeded carbon solubility limit and the diffusion activation occurring during milling. The obtained results highlight the importance of controlling the W concentration and mechanical alloying conditions to tailor the microstructure and phase stability of heavy HEAs, which is promising for applications in high-temperature and highly loaded components.
subject: Статті
  topic: section
subject: mechanical alloying
  topic: keywords
subject: high-entropy alloys
  topic: keywords
subject: synthesis
  topic: keywords
subject: microstructure
  topic: keywords
creator: S. Teslia
creator: О. Yurkova
creator: Iu. Bogomol
creator: І. Trosnikova
creator: P. Loboda
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 106
ending page: 110
doi: 10.36910/775.24153966.2025.84.17

ANALYSIS OF THERMOMECHANICAL COMPATIBILITY OF PHASES IN MULTILAYER MOSI2–MEB2–(TI, MO) COATINGS
type: item
description: This work presents a finite element study of the thermomechanical compatibility of multilayer gradient coatings MoSi₂–MeB₂–(Mo, Ti) on an Inconel 718 substrate. The stress and deformation fields in the coatings were analyzed during cooling from 1000 °C to 20 °C. Coatings with Mo as the buffer layer showed high stability at elevated temperatures, while Ti as a buffer improved plastic accommodation but increased residual stresses in some layers. Among the studied compositions, MoSi₂–ZrB₂–10 SiC–Mo demonstrated the lowest stress levels (~100 MPa) and the highest thermomechanical stability under cyclic thermal loading. The results highlight the importance of selecting appropriate barrier and buffer layers to minimize thermal stresses and ensure coating integrity in high-temperature applications.
subject: Статті
  topic: section
subject: gradient coating
  topic: keywords
subject: MoSi₂
  topic: keywords
subject: transition metal borides
  topic: keywords
subject: thermomechanical compatibility
  topic: keywords
subject: finite element analysis
  topic: keywords
subject: Inconel 718
  topic: keywords
subject: high-temperature stability
  topic: keywords
subject: residual stress
  topic: keywords
creator: Iu. Bogomol
creator: P. Loboda
creator: S. Teslia
creator: V. Nadtoka
creator: I. Husarova
creator: V. Kraieva
rights: Copyright (c) 2026 Naukovi notatky
date: 2026-01-06
publication date: 2026-01-06
starting page: 100
ending page: 105
doi: 10.36910/775.24153966.2025.84.16