METHODS AND RESULTS OF MEASURING THERMOPHYSICAL CHARACTERISTICS OF THE INTERNAL HEAT-PROTECTIVE COATING AT TEMPERATURES UP TO 250 °C

Abstract

The paper presents the methods and results of the study of heat-protective coatings, which are used as an internal
heat-insulating layer of multifunctional coatings for rocket and space technology products. The main task of such a layer is to
prevent overheating of the main structure above 200 °C and its maximum operating temperature, as a rule, should not exceed
250 °C.The coefficient of specific heat of the model material samples with low thermal conductivity in the temperature range
from 20 to 200 °C using the IT-c-400 device at a heating rate of 0.1 K/s. An original method for determining the thermal
conductivity coefficient has been developed, which makes it possible to simultaneously determine the thermal conductivity
coefficient of 3 samples when simulating the operational heating rate. Its thermal conductivity in the specified temperature
range is 0.12-0.14 W/(mK). The estimation of the errors showed very good agreement between the calculated and
experimental results