The main disrepair mode is oxidation wear in drillingZrO_2/CePO_4. However, the main rupture modes are plastic deformation ofcutting edge, flaw, scaling, fragmentation and pock on cutting edge.

• 加工ZrO_2/CePO_4时钻头失效的主要原因是氧化磨损,加工氟金云母时刀具破损的型式有切削刃塑性变形、裂纹与剥离,崩刃,后刀面麻点等。