| 摘要 |
PURPOSE:To obtain a highly reliable sintered compact having high strength and toughness by baking a mixture of SiC and a mixed oxide produced by adding silica to a rare-earth metal oxidealumina-based oxide. CONSTITUTION:The objective silicon carbide-mixed oxide sintered compact free from defects such as void and pore can be produced by mixing 5-95wt.% of a mixed oxide consisting of 95-5wt.% of rare-earth metal oxide, 4.9-94.9wt.% of alumina and 0.1-10wt.% of silica and 90-5 wt.% of SiC powder, whisker or their mixture, forming the obtained mixture, heating the formed product in a non-oxidizing atmosphere at a heating rate of 5-2000 deg.C/min and maintaining at 1600-2100 deg.C for 0.1-600min. The above mixed oxide is e.g. composed of 99.9-90wt.% of Ln4Al2O0 or LnAlO3 (Ln is rare-earth elements or their mixture) and 0.1-10wt.% of silica. |
