中文摘要：

利用单颗金刚石磨粒划擦蓝宝石工件,跟踪检测磨粒以点、线、面等三种接触形式划擦蓝宝石过程中的磨损体积、表面形貌、划擦力与力比等的磨损变化特征.研究结果表明：接触方式对金刚石磨粒的耐磨性具有显著的影响,三种情况下都可在金刚石后部观察到片状解理形貌;磨损的加剧使金刚石磨粒划擦力与力比出现一定程度的减小.

英文摘要：

Single diamond abrasive grits are employed to scratch on the workpiece of sapphire.Wear variation characteristics such as wear volume,surface morphology,scratching forces and force ratios are tested during diamond grits scratching on sapphire with three contact types of point,line and plane.The results show that the contact type has obvious impact on the wear resistance of diamond grit.Lamellar cleavage morphology is detected at the back of diamond grit with the three contact types.The scratching forces and force ratio appear to decrease with the increasing wear of the diamond.