Abstract

Results of investigations on the etching of synthetic diamond during catalytic hydrogenation by dispersed iron are presented. Experiments were performed at 1000 degrees C. The main characteristics of the interaction of iron particles with the octahedral faces of the synthetic diamond in a hydrogen atmosphere are a tangential type of etching and an irregular movement in the (111) plane. In contrast, the etching of natural diamond by iron particles during hydrogenation occurs mainly normal to their octahedral faces. (C) 2000 Elsevier Science S.A. All rights reserved.

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