Influence of powder composition and milling media on the formation of molybdenum disilicide by a mechanically induced self-propagating reaction

Bing K. Yen, Tatsuhiko Aizawa, Junji Kihara

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The spontaneous formation of molybdenum disilicide (α-MoSi2) during the mechanical alloying of a stoichiometric Mo-Si powder mixture occurred by a mechanically induced self-propagating reaction (MSR) - a mechanism similar to that of the thermally ignited self-propagating high-temperature synthesis (SHS). The bulk of α-MoSi2 formation occurred in less than 15 min once the reaction commenced after 14 h, 15 min of milling. When the milling media was switched from zirconia to steel, however, the reaction rate became sluggish as both the α and β phases were formed. The mechanical alloying of the Si-rich and Si-poor compositions was also characterized by the gradual formation of α and β phases.

Original languageEnglish
Pages (from-to)2221-2223
Number of pages3
JournalJournal of the American Ceramic Society
Issue number8
Publication statusPublished - 1996 Aug
Externally publishedYes


ASJC Scopus subject areas

  • Ceramics and Composites

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