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Multi-Phase Functionally Graded Materials for Thermal Barrier Systems

Published online by Cambridge University Press:  10 February 2011

M. R. Jackson ,
A. M. Ritter ,
M. F. Gigliotti ,
A. C. Kaya  and
J. P. Gallo
M. R. Jackson
Affiliation:
Electric CRD, Schenectady, NY [email protected]
A. M. Ritter
Affiliation:
Electric CRD, Schenectady, NY [email protected]
M. F. Gigliotti
Affiliation:
Electric CRD, Schenectady, NY [email protected]
A. C. Kaya
Affiliation:
Electric CRD, Schenectady, NY [email protected]
J. P. Gallo
Affiliation:
Electric CRD, Schenectady, NY [email protected]
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Abstract

Metallic candidates for functionally graded material (FGM) coatings have been evaluated for potential use in bonding zirconia to a single crystal superalloy. Properties for four materials were studied for the low-expansion layer adjacent to the ceramic. Ingots were produced for these materials, and oxidation, expansion and modulus were determined. A finite element model was used to study effects of varying the FGM layers. Elastic modulus dominated stress generation, and a 20–25% reduction in thermal stress generated within the zirconia layer may be possible.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 434: Symposium U – Layered Materials for Structural Applications , 1996 , 33
Copyright
Copyright © Materials Research Society 1996

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