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The effectiveness of coatings used as permeation barriers in fusion technology materials is reviewed. The coating materials studied were Al(2)O(3), TiC and a bilayer of TiC/TiN deposited by pack cementation, chemical vapour deposition (CVD) and vacuum plasma spray (VPS). The effectiveness of direct oxide growth on the surface is also considered. Studies were performed in the temperature range 515 - 742 K, using deuterium at pressures in the range 1 - 50 kPa. For alumina, TiC and TiC/TiN deposited by CVD on AISI 316L, permeation was reduced by at least one order of magnitude. The best result obtained was a reduction of three orders of magnitude for a VPS aluminium layer deposited on MANET.

Additional information

Authors: PERUJO A, JRC Ispra (IT);FORCEY K S, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Third International Symposium on Fusion Nuclear Technology, Los Angeles (US), June 27 - July 1, 1994
Availability: Available from (1) as Paper EN 38431 ORA
Record Number: 199410915 / Last updated on: 1994-11-28
Original language: en
Available languages: en