Abstract

Mo-Si-B alloys consisting of a Mo solid solution and the intermetallic phases Mo{sub 3}Si and Mo{sub 5}SiB{sub 2} were synthesized by mechanical alloying followed by sintering and hot isostatic pressing to field an ultra-fine (triplex) microstructure with all three phases being in the sub-micron range. at temperatures as low as 1300C the material exhibits superplasticity, with tensile strain to failures of 200-400% at strain rates as high as 10{sup -3}s{sup -1}.

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