Abstract
Ion implantation of glassy carbon and other graphitic forms of carbon leads to significantly increased resistance to wear. The effect is observed for a variety of ion species. Nitrogen ion doses as low as 5 × 10 15 ions/cm 2 at 50 keV are effective and the enhancement is related to the damage produced by the incident ions. New and previous data show the importance of ion energy and dose in determining the modified (damaged) zone. The general applicability of implantation as a modification tool for graphite-based carbon is supported by work with highly ordered pyrolytic graphite (HOPG), electrode carbon and carbon fibre. Aspects of possible mechanisms responsible for the enhanced wear resistance are discussed.
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