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Strain Tolerance and Microstructure of Thermal Barrier Coatings Produced by Electron Beam Physical Vapor Deposition Process

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Abstract:

Several kinds of thermal barrier coatings (TBCs) deposited by electron beam physical vapor deposition (EB-PVD) were produced as a function of electron beam power in order to evaluate their strain tolerance. The deposition temperatures were changed from 1210 K to 1303 K depending on EB power. In order to evaluate strain tolerances of the EB-PVD/TBCs, a uniaxial compressive spallation test was newly proposed in this study. In addition, the microstructures of the layers were observed with SEM and Young’s moduli were measured by a nanoindentation test. The strain tolerance in as-deposited samples decreased with an increase in deposition temperature. In the sample deposited at 1210 and 1268 K, high-temperature aging treatment at 1273 K for 10 h remarkably promoted the reduction of the strain tolerance. The growth of thermally grown oxide (TGO) layer generated at the interface between topcoat and bondcoat layers was the principal reason for this strain tolerance reduction. We observed TGO-layer growth even in the as-deposited sample. Although the thickness of the initial TGO layer in the sample deposited at high temperature was thicker, the growth rate during aging treatment was smaller than those of the other specimens. This result suggests that we can improve the oxidation resistance of TBC systems by controlling the processing parameters in the EB-PVD process.

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Periodical:

Materials Science Forum (Volumes 522-523)

Pages:

267-276

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.522-523.267

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Online since:

August 2006

Authors:

Kunihiko Wada, Yutaka Ishiwata, Norio Yamaguchi, Hideaki Matsubara

Keywords:

Electron-Beam, Physical Vapor Deposition (PVD), Sintering, Thermal Barrier Coating (TBC), Thermally Grown Oxide, Zirconia

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] M. J. Stringer, N. M. Yannar, M. G. Topping, F. S. Pettit and G. H. Meier, Z. Metallkd., 90 1069 (1999).

Google Scholar

[2] N. Mori, J. Gas Turbine Soc. Jpn., 30.

Google Scholar

[6] 6 (2002).

Google Scholar

[3] M. Yoshiba, Engine Technology, 6.

Google Scholar

[5] 40 (2004).

Google Scholar

[4] P. Morrell and D. S. Rickerby, Proc. AGARD SMP Meeting on Thermal Barrier Coatings, 20-1 (1997).

Google Scholar

[5] N. P. Padture, M. Gell and E. H. Jordan, Science, 296 280 (2002).

Google Scholar

[6] J. R. Nicholls, MRS Bulletin, 9 659 (2003).

Google Scholar

[7] M. Peters, C. Leyens, U. Schulz and W. A. Kaysser, Advanced Engineering Materials, 3.

Google Scholar

[4] 193 (2001).

Google Scholar

[8] U. Schulz, H. Oettel and W. Bunk, Z. Metallkd. 87 6 (1996).

Google Scholar

[9] K. Wada and H. Matsubara, Ziryo-to-Kankyo, 54.

Google Scholar

[5] 195 (2005).

Google Scholar

[10] K. Fritscher, U. Schulz, C. Leyens and M. Peters, Ceramic Materials and Components for Engines, J. G. Heinrich and F. Aldinger (Eds), Wiley-Vch, 517 (2001).

DOI: 10.1002/9783527612765.ch88

Google Scholar

[11] A. G. Evans, M. Y. He and J. W. Hutchinson, Progress in Materials Science, 46 249 (2001).

Google Scholar

[12] C. A. Johnson, J. A. Ruud, R. Bruce and D. Wortman, Surf. Coat. Technol., 108-109 80 (1998).

Google Scholar

[13] K. Wada, N. Yamaguchi and H. Matsubara, Surf. Coat. Technol., 191 367 (2005).

Google Scholar