Evaluation of TBC-coated {beta}-NiAl substrates without a bond coat

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{beta}-NiAl substrates with various alloy additions and oxide dispersions were coated with Y{sub 2}O{sub 3}-stabilized ZrO{sub 2} using electron beam-physical vapor deposition. Cyclic oxidation experiments (1000-1200 C) were conducted to study 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{sub 2}O{sub 3} scale microstructures were compared to those for uncoated substrates. Degradation of substrate-alumina interface by void formation was the primary mechanism leading to coating spallation. Coating lifetime was correlated to alumina scale adhesion on unocated substrates.

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12 p.

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Pint, B. A.; Nagaraj, B. A. & Rosenzweig, M. A. April 1996.

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{beta}-NiAl substrates with various alloy additions and oxide dispersions were coated with Y{sub 2}O{sub 3}-stabilized ZrO{sub 2} using electron beam-physical vapor deposition. Cyclic oxidation experiments (1000-1200 C) were conducted to study 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{sub 2}O{sub 3} scale microstructures were compared to those for uncoated substrates. Degradation of substrate-alumina interface by void formation was the primary mechanism leading to coating spallation. Coating lifetime was correlated to alumina scale adhesion on unocated substrates.

Physical Description

12 p.

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OSTI as DE96008698

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  • Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Anaheim, CA (United States), 4-8 Feb 1996

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  • Other: DE96008698
  • Report No.: CONF-960202--19
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 217652
  • Archival Resource Key: ark:/67531/metadc669617

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  • April 1996

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  • June 29, 2015, 9:42 p.m.

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  • Jan. 25, 2016, 4:32 p.m.

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Pint, B. A.; Nagaraj, B. A. & Rosenzweig, M. A. Evaluation of TBC-coated {beta}-NiAl substrates without a bond coat, article, April 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc669617/: accessed August 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.