The resistance of diamond to abrasion

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Abstract
The resistance of diamond to abrasion by the conventional method of diamond polishers, using a cast-iron scaife with diamond powder, is extremely sensitive to the orientation of the stone. Thus the rate of removal of material is known to very by a factor of over a hundred along different directions on a cube face. This anisotropy has been investigated by measurements of the rate of wear on facets in the zone [010]. Other experiments have been undertaken to elucidate the mechanism responsible for the wear. It is concluded that abrasion proceed as the result of mechanical processes rather than by thermal ones, as has sometimes been suggested. Measurements with a diamond impregnated wheel show that the basic hardness variations on a diamond are comparatively small. The large. anisotropy observed with the conventional method is not a fundamental property of the diamond, but is associated with the use of loose powder.

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