酸化がホットプレスβ-サイアロンーSiC複合焼結体に及ぼす影響

概要

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β-sialon with Z=1(+4), Z=2(+4) and Z=3(+4) (Si_<6-Z>Al_ZO_ZN_<8-Z> : Z=0-4.2, +4 : 4 eq% excess oxygen over the each Z number) from a powder mixture of α-Si_3N_4,α-Al_2O_3, AIN and SiC was hot pressed to produce β-sialon-SiC composites. The hot-pressed β-sialon-SiC composites were oxidized in an electric furnace at 1300 ℃ for 100 hours. Bending strength, weight gain, surface roughness and optical microscopic observation of sintered materials were carried out after oxidation. The results are obtained as follows: (1) The weight gain of the composite decreased slightly by the addition of SiC. (2) The bending strength of the composites was slightly improved after oxidation. (3) Weight gain of the composites was little increased as the Z number increased, but pitting was observed on the surface of Z =2(+4) and Z=3(+4) β-sialon-50 wt% SiC composites.
社団法人日本セラミックス協会の論文
1990-03-01