Hydrothermal Electrophoretic Deposition of Yttrium Silicates Coating on SiC-C/C Composites

Abstract:

Yttrium silicates coatings were deposited on SiC-C/C composites surface by a hydrothermal electrophoretic process using yttrium silicates nano-crystallites, isopropanol and siodine as source materials, solvent and charging agent, respectively. The yttrium silicates nano-crystallites were preprepared by a sonochemical process. The influence of deposition temperatures on the microstructures and crystallization of the yttrium silicates coatings were investigated. Surface and cross-section microstructures of the as-prepared multi-coatings were characterized by XRD and SEM. Results show that the coatings are composed by yttrium silicates crystallites with the main phase of Y2Si2O7 and a little Y2SiO5. The thickness and the density of the yttrium silicates coatings increases with the increase of deposition temperatures; and the coating process has little influence on the phase compositions of the coatings.

• Periodical: Key Engineering Materials (Volumes 368-372)
• Pages: 1291-1293
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.368-372.1291
• Online since: February 2008
• Authors: Yu Tao Zhang, Jian Feng Huang, Li Yun Cao, Fei Deng, Jian Peng Wu
• Keywords: Carbon, Carbon Composites, Hydrothermal Electrophoretic Deposition, Yttrium Silicate

References

[1] J.E. Sheehan, K.W. Buesking and B.J. Sullivan: Mater. Sci. Vol. 24 (1994), p.19.

[2] M.E. Westwood, J.D. Webster, R.J. Day, et al.: Mater. Sci. Vol. 36 (1996), p.1389.

[3] J.F. Huang, X.R. Zeng, H.J. Li, et al.: Carbon. Vol. 43 (2005), p.1580.

[4] J.F. Huang, H.J. Li, X.R. Zeng, et al.: Carbon. Vol. 42 (2004), p.2356.

[5] J.F. Huang: Mater. Sci. Vol. 39 (2004), p.7383.

[6] J.F. Huang, X.R. Zeng, H.J. Li, et al.: Carbon. Vol. 42 (2004), p.1517.

[7] A. Mario, D. Alicia: J. Am. Ceram. Soc. Vol. 83 (2000), p.1351.