| 摘要 |
PURPOSE:To improve strength and toughness by producing a mold body or a presintered body with ceramics contg. a specified amt. of fine zirconia as starting material, impregnating a soln. contg. zirconium into the body, drying and sintering this impregnated body. CONSTITUTION:Zirconia of <=3mum average particle size is incorporated into ceramics such as alumina, mullite, zircon or silicon carbide as starting material by 3-20wt.% and a molded body or a presintered body is produced with the starting material. A soln. contg. zirconium or an aq. soln. of a zirconium salt such as zirconium oxychloride or zirconium nitride is impregnated into the body and this impregnated body is dried and sintered. By this method, residual compressive stress is generated in the surface layer of the resulting ceramic sintered body and ceramics having superior strength and toughness is obtd. |
