Introduction：Zirconia, mainly consisting of ZrO2, has the highest mechanical strength and fracture toughness at room temperature of all major fine ceramics. It is used to make cutting blades, scissors and knives. It is also used for pump parts due to its superior surface smoothness. Our zirconia (ZrO2) is a partially stabilized zirconia (PSZ) with 3mol%Y2O3 added. Due to the small particle diameter of PSZ material, it can complete high-precision machining, and its application in the field of precision machining parts such as molds is expanding.