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Abstract

Several carbide-doped (SiC, TiC, V(8)C(7), WC, ZrC) graphites have been produced. The erosion of these materials at low-energy (eV) hydrogen ion bombardment has been investigated using the weight-loss method, mass spectroscopy, ion beam analysis, and scanning electron microscopy (SEM). The erosion yields of the WC- and V(8)C(7)-doped graphites are reduced by a factor of 2 for 30 eV D at 300 K compared to pure graphite. This observed reduction is partly attributed to surface enrichment of carbide due to preferential C erosion. The other part is assigned to changes in the chemical erosion process (Ysurf) as well as at elevated temperatures in the thermal activated process (Ytherm). The reduction of both erosion processes is determined for all dopants to be more than 25% of the erosion yield of the undoped graphite.

Additional information

Authors: BALDEN M, Max-Planck-Institut f³r Plasmaphysik, EURATOM Association, Garching (DE);BEHRISCH R, Max-Planck-Institut f³r Plasmaphysik, EURATOM Association, Garching (DE);ROTH J, Max-Planck-Institut f³r Plasmaphysik, EURATOM Association, Garching (DE);GARCA-ROSALES C, Centro de Estudios e Investigacions de Guip·zcoa ans Escuela Superior de Ingenieros, Universidad de Nauarra, San Sebastißn (ES);PAZ P, Centro de Estudios e Investigacions de Guip·zcoa ans Escuela Superior de Ingenieros, Universidad de Nauarra, San Sebastißn (ES);ETXEBERRIA J, Centro de Estudios e Investigacions de Guip·zcoa ans Escuela Superior de Ingenieros, Universidad de Nauarra, San Sebastißn (ES)
Bibliographic Reference: An article published in: Elsevier; Journal of Nuclear Materials. 290-293 (2001) pp.52-56
Availability: An article published in: Elsevier; Journal of Nuclear Materials. 290-293 (2001) pp.52-56
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