| 摘要 |
PCT No. PCT/JP92/01115 Sec. 371 Date Mar. 2, 1994 Sec. 102(e) Date Mar. 2, 1994 PCT Filed Sep. 1, 1992 PCT Pub. No. WO93/04997 PCT Pub. Date Mar. 18, 1993.A highly corrosion resistant alpha -sialon-like sintered body consisting essentially of an alpha -sialon composition represented by the composition formula Mx(Si,Al)12(O,N)16 wherein M is at least one alpha -sialon-soluble element selected from the group consisting of Yb, Er and Dy, and 0<x</=0.8, and Sc2O3 insoluble in the alpha -sialon composition and being in an amount of 0.01 to 15 wt % based on the weight of the sintered body, and containing as an intergranular phase a Sc2O3-SiO2 complex wherein the mole ratio of Sc2O3 to SiO2 is within the range of 1:0.1 to 1:50. This sintered body has not only mechanical characteristics such as strength and toughness, but high corrosion resistance such that it can withstand use under an environment where corrosion resistance such as oxidation resistance or chemical resistance is required.
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