Abstract

Nitridation of commercial ferrochrome in the self-propagating high-temperature synthesis mode was studied. The influence of the key parameters of the process (nitrogen pressure, sample diameter, particle size distribution of the initial powder) on synthesis and phase composition of the combustion products was elucidated. The microstructural features of nitrided ferrochrome and chromium nitride were examined by electron microscopy. Acid enrichment of the synthesis products in a hydrochloric acid solution was studied in relation to the composition of nitrided ferrochrome. Chromium nitride with the residual iron content of 0.3 wt% was obtained, and its thermal stability and corrosion resistance were examined.

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