Reduction of deuterium permeation through SiC/SiC composites by plasma-spray deposited eutectic Al-Si
This paper deals with the information of a deuterium permeation barrier on SiC/SiC composites, proposed as low activation structural materials for the first wall of a fusion reactor. An A1-11.22 mass% Si eutectic layer has been applied to SiC/SiC substrate by a plasma spraying process and subsequently heat treated to maximize the interfacial bond strength. Permeation measurements were performed in the temperature range 300 K to 750 K using deuterium at pressures in the range 0.5 kPa to 150 kPa. A linear dependence of permeation rate on pressure was measured. The efficiency of the coating as a deuterium permeating barrier is discussed in terms of the heat treatment temperature. The best result was achieved by heat treating the sample (SiC/SiC + A1-11.22 mass% Si) at 933 K for 2 hours.
Bibliographic Reference: Article: Journal of Nuclear Materials (1995)
Record Number: 199512110 / Last updated on: 1996-01-15
Original language: en
Available languages: en