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The effect of temperature on the chemistry and morphology of the interphase in an SCS6/Ti–6Al–4V metal matrix composite

Published online by Cambridge University Press:  31 January 2011

C. Jones ,
C. J. Kiely  and
S. S. Wang
C. Jones
Affiliation:
National Centre for Composite Materials Research, Talbot Laboratory, University of Illinois, Urbana, Illinois 61801
C. J. Kiely
Affiliation:
Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801
S. S. Wang
Affiliation:
National Centre for Composite Materials Research, Talbot Laboratory, University of Illinois, Urbana, Illinois 61801
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Abstract

The changes in the chemistry and morphology within the interphase region of an SCS6/Ti–6A1–4V metal matrix composite upon exposing the samples to varying heat treatments have been studied using Auger electron spectroscopy, TEM and convergent beam diffraction techniques. These changes, such as the formation of small TiC particles at one interface and the narrowing of a protective pyrocarbon layer at another, induce fracture to occur at different places within the interphase upon heating. The reasons for this are explained. Evidence for a change in phase of a TixSiy(C) layer to the more thermodynamically stable Ti5Si3 is also given.

Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 7 , July 1990 , pp. 1435 - 1442
Copyright
Copyright © Materials Research Society 1990

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