Behavior of Thick SiC Gradient Coatings on Graphite under High Heat Flux and HT-7 Limiter Plasma Irradiation
The behavior of thick SiC gradient coatings on different graphites under high power electron beam irradiation, pulsed high energy laser impact, and HT-7 limiter plasma action was investigated. In the following tests at these facilities, the samples were examined using SIMS, EDAX, X-ray crystallography, profilometer and Auger spectroscopy. Thick SiC gradient coatings showed excellent durability under high heat flux and in real conditions of HT-7 limiter plasma irradiation. The primary results indicated that the use of multi-element doped graphite, GBST1308 (1%B4C, 2.5%Si, 7.5%Ti) with high thermal conductivity, as substrate will improve the durability of thick SiC gradient coatings significantly.
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
H. Li et al., "Behavior of Thick SiC Gradient Coatings on Graphite under High Heat Flux and HT-7 Limiter Plasma Irradiation", Materials Science Forum, Vols. 475-479, pp. 1367-1370, 2005