Abstract

The formation mechanism of MoSi 2 by self-propagating high-temperature synthesis (SHS) was studied by quenching the reaction front into liquid nitrogen or in a copper block. The microstructural analysis of the front indicated that the formation of MoSi 2 occurs via dissolution of Mo into Si melt followed by MoSi 2 precipitation. The effects of processing variables including Mo particle size, preheating temperature, and diluent content on the MoSi 2 particle size were discussed, based on the mechanism proposed in this study.

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