Preparation of high-porosity materials from refractory compounds

Abstract

1. The possibility has been demonstrated of obtaining parts from carbides, borides, and silicides of refractory metals by the reduction of oxides (with the formation of volatile reduction products-CO, B2O2 and SiO) with the simultaneous sintering of the resulting active particles of the refractory compounds. 2. A study was made of the production of high-porosity parts (up to 70–72% porosity) from the chromium carbide Cr3C2 during the actual formation of this carbide by the reduction of chromium oxide with carbon black.