| 摘要 |
PURPOSE:The titled grinding material applicable to heavy grinding fields, having improved grinding performances, obtained by adding ZrO2, TiO2 and Y2O3 or a mineral of rare earth element containing or Y2O3 as a melting additional matter to Al2O3, melting them, cooling them rapidly. CONSTITUTION:In a grinding material of Al2O3-ZrO2-TiO2 system obtained by adding ZrO2 and TiO2 to Al2O3, melting them, cooling them rapidly, preferably 0.05-7wt% Y2O3 or a mineral of rare earth element containing Y2O3 as another melting additional matter based on the total amounts of Al2O3, ZrO2, and TiO2 is added to them, so that grinding performances are improved and this grinding material is applicable to especially light grinding among heavy grinding, and applicable well to Ti alloy. The addition of Y2O3 or the mineral of rare earth element containing Y2O3 in the range crystallizes tetragonal system crystal of ZrO2 in about 70-100% remaining ratio, precipitation ratio of alpha-Al2O3 of initial crystal is suppressed to <= about 5%, and grinding performances can be improved. |
