INFLUENCE OF CERAMIC MICROSPHERES/CARBON FIBERS ON THE THERMAL SHIELD COATINGS’ PHYSICAL AND MECHANICAL PROPERTIES

Abstract

Investigated composite fibrous bulk molding compound (BMC) materials that meet the requirements for materials of thermal shield coatings. The physical and mechanical properties of materials for thermal shield coatings operating at extremely high temperatures have been investigated. A polymer composite material with carbon fibers as a filler and phenol-formaldehyde as a matrix (binder) plays an effective role in resisting high temperatures, since the matrix evaporates and burns on the surface, creating a thermal protective layer. It was found that the use of a mixture of hollow ceramic microspheres in the phenol-formaldehyde matrix will make it possible to obtain a polymer composite material with low thermal conductivity. The introduction of ceramic hollow microspheres in the amount of 5 wt. % increases the compression strength indicators up to 20% and decreases the thermal conductivity up to 40 %.