Low Thermal Conductivity Ceramics for Thermal Barrier Coatings

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This paper summarizes the basic properties of a series of rare-earth zirconate ceramics (Gd2Zr2O7, Sm2Zr2O7, Dy2Zr2O7, Er2Zr2O7 and Yb2Zr2O7). The phases and microstructures were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Thermal properties of these materials were determined. The results indicated that Sm2Zr2O7 rare-earth zirconate ceramics have the lower thermal conductivity and the highest thermal expansion coefficient than other rare-earth zirconate ceramics. The dielectric constant decreases with the increase of atomic number.

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Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1764-1766

DOI:

10.4028/www.scientific.net/KEM.336-338.1764

Citation:

Y. X. Qin et al., "Low Thermal Conductivity Ceramics for Thermal Barrier Coatings", Key Engineering Materials, Vols. 336-338, pp. 1764-1766, 2007

Online since:

April 2007

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$35.00

[1] C. Leyens, U. Schulz, K. Fritscher, M. Bartsch, M. Peters and W. A. Kaysser: Zeitschrift fuer Metallkunde Vol 92(2001), p.762.

[2] W. A. Kaysser, M. Bartsch, T. Krell, K. Fritscher, C. Leyens, U. Schulz and M. Peters: Ceramic Forum International Vol. 77 (2000), p.32.

[3] N.P. Padture, M. Gell and E.H. Jordan: Science Vol. 296 (2002), p.280.

[4] H. Ibegazene, S. Alperine, and C. Diot: J. Mater. Sci. Vol30 (1995), p.938.

[5] J. R. Nicholls, K. J. Lawson, A. Johnstone, and D. S. Rickerby: Surface and Coatings Technology Vol151-152(2002), p.383.

[6] R. C. David: Surf. Coat. Technol. Vols163-164(2003), pp.67-74.

[7] J. D. Wang, W. Pan, Q. Xu, and T. Taiji: Key. Eng. Mater. Vols. 280-283 (2005), p.1503.

[8] R. Vassen, X.Q. Cao, F. Tietz, D. Basu and D. Stoever: J. Am. Ceram. Soc. Vol. 83 (2000), p.2023. Fig. 4 Dielectric constant of rare-earth zirconates as a function of frequency.

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