Phase Formation and Interaction between Nanosized Nonstoichiometric Silicon Carbide and Iron Oxide

Abstract

The interaction between nanosized powder of a solid solution of carbon in silicon carbide and iron oxide (as iron oxide pigment and sintered and atomized iron ore concentrate) in high-temperature heating is studied. The quantitative phase composition of the resulting products is analyzed. Potential reactions of interaction between silicon carbide and iron oxide are examined. It is established that the (SiC–C)–Fe₂O₃ powder mixtures interact to produce a heterophase structure by the reduction of iron and the formation of silicides (ε-FeSi, Fe₂Si, Fe₃Si, Fe₅Si₃), carbides (Fe₃C, Fe₇C₃), and iron (α-Fe) as homogeneous microstructure of fine particles.