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This report describes the evaluation of CVD diamond powder produced from roll milling diamond films synthesized by the arc discharge plasma jet CVD as the grinding wheel. The metal bonded and the resinoid bonded grinding wheels are prepared using the CVD diamond powder. In case of the grinding of ZrO2 with metal bonded wheel, the new cutting edge emerges moderately, and the grinding power is constant, however, in case of the grinding of Si3N4 with metal bonded wheel, the powder wear a lot, and the grinding power increases and decreases suddenly. In the grinding of Si3N4 with the resinoid bonded wheel, the powder pull out moderately, and the stable grinding power is given. The fracture in limited amounts occurs from the powder boundaries and the defects in crystal, and the fracture rate of CVD diamond is larger than that of the irregular diamond. The CVD diamond powder have remarkable characteristic that new cutting edges are easily produced in its grinding process. The CVD diamond powder can be expected for the candidate for ceramic materials processing.

Evaluation of CVD Diamond Powder as Grinding Wheels.