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Fiber Coating Performance in TiAl

Published online by Cambridge University Press:  15 February 2011

C. McCullough  and
R. R. Kieschke
C. McCullough
Affiliation:
3M Company, Metal Matrix Composites Program, 3M Center, Bldg. 60-IN-01, St. Paul, MN 55144-1000.
R. R. Kieschke
Affiliation:
3M Company, Metal Matrix Composites Program, 3M Center, Bldg. 60-IN-01, St. Paul, MN 55144-1000.
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Abstract

The interfacial chemical behavior of two candidate coating systems for use on fine diameter (∼10 μm) Al2O3 in TiAl is presented. The performance of the Nb/Y2O3 system appears to be related to the transport rate of Ti through the Y2O3 layer. Interfacial reaction is then observed at points where the Y2O3 thickness is less than about 1 μm. The main reaction product formed appears to be an oxygen saturated TiAl phase. An alternative system, C/TiN/Y2O3 is then presented as a solution to the Ti transport problem and may offer more desirable interfacial mechanical properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 350: Symposium U – Intermetallic Matrix Composites III , 1994 , 119
Copyright
Copyright © Materials Research Society 1994

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