1993 Volume 33 Issue 9 Pages 1023-1028
The characterization of chromium silicide films and the formation process by disproportionation reaction in molten salts are investigated. The films were performed on steel by two step treatment process of molten salt with KCl, BaCl2, NaF, metal halide and metal powder. Chromium carbide films were formed on a substrate at first step and chromium silicide films were formed at second step. The films performed at less than 800°C mainly consists of CrSi2 and a slight SiC and is good hardness about more than 2 200 Hv and high corrosion resistance. The hardness of films performed at 900°C was, however, lower. This two step treatment of molten salt method makes it possible to form the intermetallic compound films, even if any component elements of those films do not exist in substrate.
