| 摘要 |
PURPOSE:To provide a method for producing a sialon-based sintered compact remarkably improved in homogeneity of structure as compared with that of conventional sialon-based sintered compacts, capable of solving color shading, remarkably improved in not only corrosion resistance and mechanical characteristics such as high-temperature strength and fracture toughness, as a matter of course but also especially oxidation resistance by homogenization of the grain boundary glass phase. CONSTITUTION:A sialon-based sintered compact containing REalpha-sialon crystals and beta-sialon crystals is produced by a method characterized as follows: Fine powder having 5-50nm crystallite diameter, 0.01-0.1mum primary particle diameter, 20-100m<2>/g specific surface area and <=5mum secondary particle diameter is used as the RE-containing powder which is a starting raw material. |
