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Plasticity Enhancement of MoSi2 at Elevated Temperatures Through the Addition of TiC

Published online by Cambridge University Press:  15 February 2011

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

Monolithic MoSi2 and MoSi2-TiC particulate composites with 10 vol % and 15 vol % TiC were tested in compression between 950°C and 1200°C. The MoSi2-TiC composites can be deformed plastically at lower temperatures than MoSi2 can before brittle fracture occurs. The composites exhibit much lower strain hardening rates and attain zero strain hardening rate at much lower strains than monolithic MoSi2. The differences between the composites and monolithic MoSi2 in plasticity and in strain hardening behavior is attributed to efficient dislocation generation into the matrix from sources at the MoSi2-TiC interfaces.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 273: Symposium Q – Intermetallic Matrix Composites II , 1992 , 253
Copyright
Copyright © Materials Research Society 1992

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References

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