Composition of a-C/B:H films and of redeposited layers in the boronized TEXTOR tokamak
The graphite limiters and the inconel liner of TEXTOR were coated in-situ with boron-doped carbonaceous film. Several samples of SS 304, Inconel 600, graphite (EK 98) and silicon single crystals were exposed to the boronisation procedure at two different toroidal locations. The depth composition of the deposited layers (noted as a-C/B:H) was later investigated by AES analysis combined with Ar-sputtering, and by SNMS. Depth profiles showed the homogeneity of the films. In addition, a toroidal variation in the B/C-ratio in the hydrogen content, as well as in the thickness, was observed. No traces of bulk oxidation were found. A boronised Inconel target, exposed to 253 tokamak discharges in D(2) exhibited only a minute erosion of the originally deposited film. An additional thin layer, deposited by plasma transport on the surface, contained mainly carbon and a small amount of boron, oxygen and metal impurities.
Bibliographic Reference: Article: Vacuum, Vol. 41 (1990) Nos. 4-6, pp. 1486-1488
Record Number: 199110056 / Last updated on: 1994-12-02
Original language: en
Available languages: en