The strength dependence of ceramics on microstructure, surface features and grinding conditions were studied in this work. A SiC and three 12Ce-TZPs with different grain sizes were ground under specific grinding conditions using two diamond-grinding machines. The normal grinding force increases with table speed, depth of cut and removal rate. Examination of the surface features show that the surface roughness in SiC and 12Ce-TZPs and the stress-induced t-m transformation in the 12Ce-TZPs strongly depend on the grinding conditions. The bending strength of the 12Ce-TZP with smaller grain size is not sensitive to the imposed grinding conditions. The strength of the 12Ce-TZP with the largest grain size and the SiC, however, is more sensitive to the grinding conditions. For the 12Ce-TZPs the grain size and the amount of the stress-induced t-m transformation dominate their strength.
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