| 摘要 |
PURPOSE:To improve the wear resistance and thermal shock resistance of the above material by forming a thermal sprayed layer of ZrO2 consisting essentially of ZrO2 and to which Cr2O3 or further other oxide is fused to incorporate. CONSTITUTION:The ZrO2-Cr2O3 ceramics having the compsn. to which 10-70wt.% Cr2O3 or one or more kinds among 1-18wt.% oxide such as CaO, MgO, Y2O3 and CeO2 are fused and consisting of the balance ZrO2 is thermal sprayed by plasma thermal spraying method, etc., on the surface of hearth roll, etc., to be used in a high temp. atmosphere of a heat treatment furnace, by which the thermal sprayed layer having excellent wear resistance and thermal shock resistance in the range of high temp. is formed. |
