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Transmission Electron Microscopy Investigations of an As-Processed Yttria-Stablilized zirconia on Platinum Aluminide Bond Coat

Published online by Cambridge University Press:  17 March 2011

Judith C. Yang  and
Noel T. Nuhfer
Judith C. Yang
Affiliation:
Department of Material Science and Engineering, University of Pittsburgh, Pittsburgh, PA 15261
Noel T. Nuhfer
Affiliation:
Materials Science Department, Carnegie Mellon University, Pittsburgh, PA 15261
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Abstract

We examined an as-processed yttria-stabilized zirconia (YSZ) on platinum aluminide bond coat (BC), produced by electron beam physical vapor deposition, with transmission electron microscopy, including energy dispersive X-ray spectroscopy and hollow-cone diffraction. Columnar α-Al2O3 grains (∼100nm) formed at the interface between the BC and YSZ. A thin intermix (∼50nm) region was observed between the α-Al2O3 and YSZ. Hollow cone diffraction showed that the α-Al2O3 grains and the small-grained (∼10nm) YSZ near the α-Al2O3 are randomly oriented, without preferential texturing. No evidence of spinel formation was noted.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 645: Symposium M – Thermal Barrier Coatings-2000 , 2000 , M6.4.1
Copyright
Copyright © Materials Research Society 2001

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References

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