Possibility of electron-beam technology obtaining of composite materials

Abstract

Among new materials obtained by evaporation and subsequent condensation in a vacuum, should include composite dispersion-hardened layered and porous materials. Dispersion-hardened condensates consist of a polycrystalline metal or ceramic matrix with uniformly distributed in the volume of dispersed particles of second phase. By varying the substrate temperature the deposition rate can change over a wide range average crystallite size from a few hundred microns to several hundred nanometers, the particles of strengthening phase from a few nanometers to several microns.Evaporation condensation technique allows to realize two typical approaches to the formation of structure microlayers condensates.
1. Produce condensation at relatively low temperatures and as a consequence of receiving condensates with a high density of crystal lattice within each layer.
2. Produce microslayers condensates with enough equilibrium structure at substrate temperatures of melting 0,4–0,5 least refractory layer.
Electron-beam technology can be successfully used for porous materials. Examples of these composite materials are.