アルミナ-MgO安定化ジルコニア-ジルコン複合焼結体の作製とその特性

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rights: 社団法人日本セラミックス協会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110002290310/Densification conditions of alumina, MgO stabilized zirconia (MSZ) and zircon composite were studied, and sintered bodies were evaluated as cutting tool by the temperature dependence of three-point bending strength. The Mg-spinel formed from Al_2O_3 and MgO, stabilizer of zirconia, prevented the densification Al_2O_3-MSZ composite. Thus, the zircon was added to the Al_2O_3-MSZ composite and then the powder mixture was sintered after molding. The addition of zircon prevented the Mg-spinel formation, and the composite was densified by controlling the cooling rate. Pre-sintering and HIP treatment of the composite which contained 60 wt% Al_2O_3, 25 wt% MSZ and 15 wt% zircon were performed. The bending strength of the composite did not decrease to 1200℃, and increased with increase in Densification conditions of alumina, MgO stabilized zirconia (MSZ) and zircon composite were studied, and sintered bodies were evaluated as cutting tool by the temperature dependence of three-point bending strength. The Mg-spinel formed from Al_2O_3 and MgO, stabilizer of zirconia, prevented the densification Al_2O_3-MSZ composite. Thus, the zircon was added to the Al_2O_3-MSZ composite and then the powder mixture was sintered after molding. The addition of zircon prevented the Mg-spinel formation, and the composite was densified by controlling the cooling rate. Pre-sintering and HIP treatment of the composite which contained 60 wt% Al_2O_3, 25 wt% MSZ and 15 wt% zircon were performed. The bending strength of the composite did not decrease to 1200℃, and increased with increase in the content of zircon. On the other hand, high temperature bending strength decreased with increase in the content of zircon. In order to evaluate the composite as a cutting tool, the resistance to fracture was investigated. It was found that the sample, which had a high temperature bending strength, had good resistance to fracture.
社団法人日本セラミックス協会の論文
1993-03-01

アルミナ-MgO安定化ジルコニア-ジルコン複合焼結体の作製とその特性

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