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An Evaluation of the Creep Properties of an Al2O3/Ni3A1 Composite and the Effect of Disorder on Mechanical Properties

Published online by Cambridge University Press:  15 February 2011

P. C. Brennan ,
W. H. Kao  and
J.-M. Yang
P. C. Brennan
Affiliation:
Mechanics and Materials Technology Center, The Aerospace Corp.,El Segundo, CA 90245
W. H. Kao
Affiliation:
Mechanics and Materials Technology Center, The Aerospace Corp.,El Segundo, CA 90245
J.-M. Yang
Affiliation:
Department of Materials Science and Engineering, University of California, Los Angeles, CA 90024
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Abstract

Ordered Ni3A1 alloys and their composites are attractive materials for elevated-temperature structural applications due to their many favorable properties. The addition of alloying elements can significantly lower the Ni3Al order-disorder transition temperature and also result in the formation of a Ni solid solution. As the percentage of Ni solid solution increases, the composite's room-temperature flexural strength increases. The effect of rocessing parameters on the material's microstructure is discussed. The complex matrix microstructure also has a significant effect on the composite's creep properties. Normal power-law creep was exhibited by the composite material when tested in compression.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 273: Symposium Q – Intermetallic Matrix Composites II , 1992 , 211
Copyright
Copyright © Materials Research Society 1992

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References

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