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以硬脆材料的压痕实验为基础，通过法向力作用的金刚石压头模拟磨粒磨削硬脆材料表面，研究了硬脆材料的脆性──延性转变的临界载荷值．并依据不同硬脆材料磨削表面的特征和断面形貌、磨削加工规律以及脆延转变的临界载荷，得出了硬脆材科超薄磨削过程中脆性──延性转变的临界切削深度．
Based on the indentation experiment of hard and brittle materials, the surface of the hard and brittle materials was simulated by the diamond abrasive head with normal force, and the critical load value of brittleness and ductility transition of hard and brittle materials was studied. The critical depth of brittleness-ductile transition in the process of ultra-thin grinding of hard and brittle material was obtained based on the characteristics of the grinding surface, the shape of the cross section, the law of grinding and the critical load of brittle transformation. .