| 摘要 |
PURPOSE:To provide a titled treating plate which is inexpensive and has many service times by forming the surface of a base body of carbon or graphite into a waveform and forming a coating layer of the composite oxide of ZrO2 and a metallic oxide, etc. having a spinnel structure on the rugged surface to an adequate thickness. CONSTITUTION:The surface of a base body which is a carbon or graphite plate is formed into a waveform and a coating layer of the composite oxide of ZrO2 and a metallic oxide having a spinnel structure of further contg. Y2O3 or CaO is coated to 10-1,000mu thickness on the rugged surface thereof in a heat treating plate for powder metallurgy formed by coating the oxide on the surface of said base body. The heat treating plate which is inexpensive, is hardly comsumable by oxidation and permits an increase in service times without stripping of the oxide coating layer on account of cracking is thus obtd. Said coating layer can be formed by melt spraying the oxide of ZrO2, etc. and MgAlO4 is adequately used for the oxide having the spinnel structure. The ratio between ZrO2 and the oxide of the spinnel structure is preferably regulated to 1/5-5/1 by weight. |
