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Abstract

The erosion of soft a C:D films by heat treatment in air and under vacuum is studied by ion-beam analysis. When the films are heated in air above 500 K, the film thickness and the areal densities of C and especially D decrease, and oxygen is incorporated in the films. The initial atomic loss rates of carbon and deuterium from the films are 2.6 x 10 (17) C atoms cm (-2)h (-1) and 4.8 x 10(17) D atoms cm(-2)h(-1) at 550 K. However, after D depletion the films show a resistivity against further erosion due to annealing in air. When the films are heated under vacuum erosion starts at about 600 K and all components including D decrease proportionally to the film thickness. Thermal desorption spectroscopy of the films reveals the evolution of CxDy type hydrocarbons. Infrared analysis shows that the incorporated oxygen is chemically bonded to carbon. The thermally-activated decomposition of the soft a C:D films is compared to that of hard a C:D films and a reaction scheme is suggested.

Additional information

Authors: MARUYAMA K, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE);JACOB W, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE);ROTH J, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE)
Bibliographic Reference: Article: Journal of Nuclear Materials, 264(1999), 56-70
Record Number: 199910505 / Last updated on: 1999-03-26
Category: PUBLICATION
Original language: en
Available languages: en
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