Preparation of Composite Materials from Refractory Powders with Surface Nanofilms

Abstract

Results are given for application of nanofilms (nanocoatings) to refractory material powders (diamond, boron nitride, silicon carbide, tungsten metal) by iodine transport. The method developed makes it possible to prepare coatings on powders with particle sizes from 10 nm to several microns, and on the surface of large objects. Coating thickness varies in the range from 1 nm to several microns. Composite materials are prepared from powder modified with nanocoatings of metals and their compounds, and the physicomechanical properties are studied that appear to be significantly better than for materials sintered from the same powders without nanocoatings. Potential areas for use of the composites obtained are determined from the results of work.