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Characterization of the Plasticity Enhancement of MoSi 2Obtained at Elevated Temperatures by the Addition of TiC

Published online by Cambridge University Press:  01 January 1992

H. Chang  and
R. Gibala
H. Chang
Affiliation:
Department of Materials Science and Engineering University of Michigan, Ann Arbor, MI 48109
R. Gibala
Affiliation:
Department of Materials Science and Engineering University of Michigan, Ann Arbor, MI 48109
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Abstract

Decremental step strain rate tests in compression were performed on MoSi2 and MoSi2-10 vol % TiC at 1150°C and 1200°C. The composite exhibits a lower stress exponent than MoSi2 between 10-4 s-1 and 10-5 s-1 TEM observations reveal the deformation of the carbide phase, as well as the efficient generation of dislocations into the matrix from the carbide-matrix interfaces. The substructures of both the matrix of the composite and monolithic MoSi 2appear to consist of mixed dislocations of predominantly edge character which occur on the same slip systems.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 1143
Copyright
Copyright © Materials Research Society 1995

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References

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