Влияние хрома на контактное взаимодействие сплавов системы Fe–Al с графитом при нагреве под высоким давлением

Abstract

The effect has been studied of chromium added to the composition of Fe–Al alloys on the microstructure of the contact melting region, which forms in the interaction of Fe–Al alloys with graphite at 5 GPa and 1600 K. It has been found that the microstructure of the contact melting region corresponds to the horizontal section of the Fe–C metastable phase diagram. Fe3C carbide that forms in the region of the contact melting of alloys of the Fe–Al system is shown to be unstable and with Al concentration above 4 mass % decomposes partially. An addition of chromium to the composition of Fe–Al alloys does not change the structure and phase composition of the contact melting region but increases the Fe3C carbide stability suppressing the carbide decomposition.