Богомол Ю.І.

The development is devoted to high-speed electron-beam sintering of samples from metal and metal-ceramic materials based on refractory compounds. The basic laws of structure formation in the conditions of electron-beam sintering of metal and metal ceramic materials are established. Computer simulation methods have been used to study the effect of porosity and porous structure of samples sintered under electron-beam sintering conditions on their temperature field and thermal conductivity.

The basic regularities of the physical nature of strength of directionally solidified eutectic alloys (LaB6-MeB2, B4C-MeB2, Ti-TiB, Mo-Si-B, etc.) have been defined by systematic studies of the influence of the nature of the matrix and reinforcing phases, their structural-geometric characteristics, and stress-strain state on the temperature dependence of mechanical characteristics of composite materials.

The technology of manufacturing of powder of superhard and high-strength ceramic materials by directional crystallization of eutectic alloys of B4C-TiB2, LaB6-ТіB2, Mo-Si-B systems in conditions of zone melting and centrifugal spraying was developed. It is found that the change of the process parameters allows obtaining the powders with particle size of 40-500 microns, a spherical shape and narrow particle size distribution.