Highly corrosion resistant .alpha.-sialon-like sintered body...

Details Highly corrosion resistant .alpha.-sialon-like sintered body... Highly corrosion resistant .alpha.-sialon-like sintered body...

C - Chemistry, Metallurgy

04

B

C04B 35/58 (2006.01) C04B 35/597 (2006.01)

Patent

CA 2116964

Abstract 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 characteris- tics such as strength and toughness, but high corrosion resistance such that it can withstand use under an en- vironment where corrosion resistance such as oxidation resistance or chemical resistance is required.

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