New technology for the manufacturing of nanocrystalline materials

Abstract

For the manufacturing of nanocrystalline materials have been developed several methods. One of the methods is based on fabrication of a metal-organic or a complex compound using appropriate metal salt solutions or their melts. Pyrolysis at 800-900/spl deg/C of an appropriate compound in hydrogen atmosphere obtains a charge of carbide or already fabricated hard metals. The second method is based on the manufacture of complex compounds and their further carbidization, using the gaseous phase. Complex compounds of optimum composition as well as a carbide making atmosphere give rise to the formation of nanocrystalline carbides and hard metals at 700-800/spl deg/C.