Abstract
The possibility of enhancing the wear characteristics of diamond has generated considerable interest. In the present study type IIa diamond has been implanted with 100 keV carbon and nitrogen ions at temperatures of 150, 470 and 920 K. These temperatures correspond to different defect mobility regimes, whilst nitrogen and carbon were chosen in an attempt to examine possible chemical effects of the ion species on the abrasion resistance of type IIa diamond. The results of abrasion testing using low load multiple pass scratch testing with a Rockwell diamond indenter are presented. These indicate that there is an increase in wear rate in both the soft 〈100〉 and hard 〈 1 10〉 directions following ion implantation. For a given dose the wear rate increases as the implant temperature is reduced. Optical transmission spectra taken in the wavelength region 200 to 750 nm show a corresponding trend in that the implantation induced absorption increases with decreasing implant temperature.
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