La2O3 Doped Y2O3 Stabilized ZrO2 TBC Prepared by EB-PVD


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Effect of La2O3 addition on thermal conductivity and high temperature stability of YSZ coating produced by EB-PVD was investigated. La2O3 was selected as an additive because it had a significant effect on suppressing densification of YSZ. The developed coating showed extremely low thermal conductivity as well as high resistance to sintering. Microstructural observation revealed that the coating had fine feather-like subcolumns and nanopores, which contributed to limit thermal transport. These nanostructures were thought to be formed by suppressing densification during deposition.



Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara




M. Matsumoto et al., "La2O3 Doped Y2O3 Stabilized ZrO2 TBC Prepared by EB-PVD", Key Engineering Materials, Vols. 317-318, pp. 501-504, 2006

Online since:

August 2006




[1] J.R. Nicholls, K.J. Lawson, A. Johnstone and D.S. Rickerby: Surf. Coat. Tech. Vol. 151-152 (2002) p.383.

[2] C. Leyens et al.:Z. Metallkd, Vol. 92 (2001) p.762.

[3] X.Q. Cao, R. Vassen, W. Jungen, S. Schwartz, F. Tiets, and D. Stöver: J. Am. Ceram. Soc. Vol. 84 (2001) p. (2086).

[4] T.J. Lu, C.G. Levi, H.N.G. Wadley, and A.G. Evans :J. Am. Ceram. Soc. Vol. 84 (2001) p.2937.

[5] M.J. Stiger, N.M. Yanar NM, M.G. Topping, F.S. Pettit and G.H. Meier: Z. Metallkd. Vol. 90 (1999) p.1069.

[6] D. Zhu and R.A. Miller: NASA/TM2002-211841.

[7] M. Matsumoto, N. Yamaguchi and H. Matsubara: Scr. Mater., Vol. 50 (2004) p.867.

[8] M. Matsumoto et al.: Surf. Coat. Tech., Vol. 194 (2005) p.31.

[9] M. Matsumoto et al. :J. Jpn. Inst. Metals, Vol. 69 (2005) p.43.

[10] K. Fritscher, U. Schluz , C Leyens and M. Peters: Ceramic Materials and Components for Engines. Weinheim: Wiley-vch; 2001. p.517.

[11] S.G. Terry, J.R. Litty and C.G. Levi: Elevated Temperature Coatings: Science and TechnologyP. Warrendale: The Minerals, Metals and Materials Society (1999) p.13.

[12] U. Schulz and M. Schmucker: Mat. Sci. Eng. Vol. A276 (2000) p.1.

[13] D.D. Hass, A.J. Slifka, H.N.G. Wadley:. Acta Mater. , Vol. 46 (2001), p.973.