Thermodynamic Analysis of Equilibrium Vapor-Phases in Producing Iron- and Cobalt-Based Alloys by Point-Source Diffusion Saturation. Communication II

Abstract

The paper presents a thermodynamic analysis of chemical equilibrium in Co–Cr–Ni–Mo alloys with different chromium content (10, 20, and 30%) produced by point-source diffusion saturation under 0.1 MPa at 500–1500 K. The elements of the alloys are most likely transported by lower chloride molecules participating in cyclic reactions. The limiting concentration of chromium above which no changes occur in either gaseous or condensed phase is 20%. It is experimentally established that chromium rapidly diffuses into the cobalt base, accompanied by the formation of homogeneous alloy powders, under the actual nonequilibrium conditions for the production of cobalt alloy powders containing more than 20% of chromium.