Effect of Yttria Nanopowder on Multi-Layer Coatings of Yttria And CVD SiC/Graphite


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Nano-yttria powder can be synthesized by yttrium citrate-urea precursor, combusted at 600°C in air. The CVD SiC coated on graphite (CVD SiC/Graphite) infiltrated by the yttrium citrate-urea precursor, combusted at of 600°C, and then sintered at 1450°C, the thin yttria film can be achieved. The SEM morphology and EDS result of the thin yttria film show a mass of needle-shaped pining into the CVD SiC layer, which improves the combination of CVD SiC layer and wash yttria coating. Therefore, it is an effective transition layer between CVD SiC coating and wash yttria layer.



Key Engineering Materials (Volumes 334-335)

Edited by:

J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang




X. Zhang et al., "Effect of Yttria Nanopowder on Multi-Layer Coatings of Yttria And CVD SiC/Graphite", Key Engineering Materials, Vols. 334-335, pp. 653-656, 2007

Online since:

March 2007




[1] RJ Jackson, Vacuum-induction Melting, Refining, and Casting of Uranium and Its Alloys [R]. RFP-4186, Washington, DC, (1989) 18~19.

[2] B Blumenthal, The melting of high purity uranium[R]. ANL-5019, Washington, DC, 1952: 12.

[3] JB Condon, CE Holcombe, Crucible materials to contain molten uranium[R]. Y-2084, Washington, DC, 1977: 13.

[4] RH Reiner, Liquid uranium reaction with coated graphite crucibles[R]. Y-2379, Washington, DC, 1987: 10.

[5] CE Holcombe, JG Banker, Uranium/Ceramic Oxide and Carbon/Ceramic Oxide Interaction Studies[R]. Y/DA-7444, Washington, DC, (1978) 8.

[6] RH Reiner, CE Holcombe, Carbon Monoxide Reaction with Liquid Uranium-Niobium Alloys.

[7] YF Xiao, et al. Rare Metal Materials and Engineering, (2001) (supp. 1): 168.

[8] AL Michelial, DF Dungan, JV Mantese, High-density yttria for practical ceramic applications. J. Am. Ceram. Soc., 75 (1992) 709-11.

[9] X Zhang, LF Cheng, LT Zhang, et al. J. Chinese Ceramic Society [J]. 31 (2003) 209-212.

[10] YD Xu, Preparation and Properties of Three Dimensional Carbon/Silicon Carbide Composites. Dissertation for a degree of PhD. (1996).

[11] WJ Kim, JY Park, SJ Oh, et al. Characteristics and sintering behavior of yttria powders synthesized by the combustion process. J. Mater. Sci. Lett., 18 (1999) 411-413.

[12] S Noriko, M Shin-ichi, I Takayasu, I., Fabrication of transparent yttria ceramics at low temperature using carbonate-derived powder. J. Am. Ceram. Soc., 81 (1998) 2023-(2028).

DOI: https://doi.org/10.1111/j.1151-2916.1998.tb02583.x