在磨削由烧结氮化硅（SSN）制成的陶瓷发动机气门时，陶瓷材料的脆性断裂行为和高失效敏感性导致再现性不足，并且由于表面和亚表面裂纹的萌生，无法满足对工件的要求。几位作者对不同陶瓷材料进行了单次划痕试验，结果表明，当超过极限未变形切屑厚度时，会导致表面出现裂纹和材料断裂。

In grinding of ceramic engine valves made of sintered silicium nitride (SSN), the brittle fracture behavior and high failure sensitivity of ceramic materials leads to insufficient reproducibility and the fulfillment of the demands on the workpiece due to surface and subsurface crack initiation. Investigations of several authors using single scratch tests on different ceramic materials show when a limiting undeformed chip thickness is exceeded, cracks and materials breakouts in the surface are caused.