Evaluation of TBC-coated β-NiAl substrates without a bond coat

B. A. Pint, B. A. Nagaraj, M. A. Rosenzweig

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations

Abstract

β-NiAl substrates with various alloy additions and oxide dispersions were coated with Y 2O 3-stabilized ZrO 2 using electron beam-physical vapor deposition. Cyclic oxidation experiments (1000°-1200°C) were conducted to study the effect of substrate dopants such as Y and Zr on coating lifetime without the intermediate metallic bond coat layer used in conventional thermal barrier coatings. Oxidation kinetics and Al 2O 3 scale microstructures were compared to those for uncoated substrates. Degradation of the substrate-alumina interface by void formation was the primary mechanism leading to coating spallation. Coating lifetime was correlated to alumina scale adhesion on the uncoated substrates.

Original languageEnglish
Title of host publicationElevated Temperature Coatings
Subtitle of host publicationScience and Technology II
EditorsRay Y. Lin, Y.Austin Chang, Ramana G. Reddy, C.T. Liu
Pages163-174
Number of pages12
StatePublished - 1996
EventProceedings of the 1996 125th TMS Annual Meeting - Anaheim, CA, USA
Duration: Feb 4 1996Feb 8 1996

Publication series

NameTMS Annual Meeting

Conference

ConferenceProceedings of the 1996 125th TMS Annual Meeting
CityAnaheim, CA, USA
Period02/4/9602/8/96

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