73. Growth of Thermally Grown Oxide on (Ni, Pt)Al Bondcoat During Short Term Oxidation

  1. Edgar Lara-Curzio and
  2. Michael J. Readey
  1. S. Laxman1,2,
  2. Y. H. Sohn1,2 and
  3. K. S. Murphy3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291191.ch73

28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings, Volume 25, Issue 4

28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings, Volume 25, Issue 4

How to Cite

Laxman, S., Sohn, Y. H. and Murphy, K. S. (2004) Growth of Thermally Grown Oxide on (Ni, Pt)Al Bondcoat During Short Term Oxidation, in 28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings, Volume 25, Issue 4 (eds E. Lara-Curzio and M. J. Readey), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291191.ch73

Author Information

  1. 1

    Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, FL 32816

  2. 2

    Mechanical Materials and Aerospace Engineering, University of Central Florida, Orlando, FL 32816

  3. 3

    Howmet Research Corporation, Whitehall, MI 49461

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2004

ISBN Information

Print ISBN: 9780470051528

Online ISBN: 9780470291191

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Keywords:

  • environmental barrier coating;
  • bonded reaction sintering technique;
  • zircon;
  • ceramic oxide powder;
  • crystalline structure

Summary

The growth and microstructure of the thermally grown oxide (TGO) play an important role in the durability and the reliability of the thermal barrier coatings (TBCs). In this study, the growth and the microstructure of the TGO, underneath the electron beam physical vapor deposited (EB-PVD) ZrO2-8wt.%Y2O3 (8YSZ) topcoat were examined as a function of surface treatment of (Ni, Pt)Al bondcoat and short term oxidation by using focused ion beam (FIB) and scanning transmission electron microscopy (STEM). While the TGO developed consisted of a mixed-oxide zone (MOZ) and continuous-columnar oxide zone (COZ) for as-coated (Ni, Pt)Al bondcoat, the TGO consisted only of COZ for grit-blasted (Ni, Pt) Al bondcoat. Numerous voids were observed near the interface between the MOZ and COZ on the as-coated bondcoat TBC.