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Elastic moduli of MoSi2-based materials

Published online by Cambridge University Press:  31 January 2011

S.R. Srinivasan  and
R.B. Schwarz
S.R. Srinivasan
Affiliation:
Center for Materials Science, Mail Stop K765, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
R.B. Schwarz
Affiliation:
Center for Materials Science, Mail Stop K765, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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Abstract

We prepared MoSi2, two-phase MoSi2/Mo5Si3, and (Mo, W)Si2 solid-solution alloy powders by mechanically alloying mixtures of elemental molybdenum, silicon, and tungsten. These powders were consolidated by hot-pressing them at 1500 °C in graphite dies. We measured the elastic moduli of these alloys by a recently developed technique for non-contact ultrasonic spectroscopy. Second-phase Mo5Si3 additions to MoSi2 result in decreased values for G and E, whereas alloying MoSi2 with WSi2 results in increased values for G and E. An analysis of these Young's moduli and of data from the literature for various intermetallic alloys suggests that for any given alloy system, the Young's moduli for its various intermetallics as a function of density fall on a straight line. Further, the lines for the different alloy systems are approximately parallel.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 7 , Issue 7 , July 1992 , pp. 1610 - 1613
Copyright
Copyright © Materials Research Society 1992

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