Si_3N_4-Si_2N_2Oコンポジットの機械的性質に及ぼす粒界相の影響

概要

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Ce/Si ratio increased with the formation of Si_2N_2O in Ce-doped Si_3N_4 based ceramics with SiO_2 addition. The intergranular liquid remained as a glass on cooling until the ratio exceeded a certain level when the intergranular liquid crystallized as cerium nitrogen apatite (Ce_5(SiO_4)_3N-Ce_<4.67>(SiO_4)_3O) during cooling. There were large differences in flexural strength, fracture toughness between the specimens with the intergranular glassy phase and the ones with the intergranular crystalline phase. Mechanical properties of the bulk bodies depended on those of the intergranular phases.
社団法人日本セラミックス協会の論文
1992-09-01