SELF-REINFORCED HP SILICON NITRIDE CERAMICS

Li Fengmei, Guan Baoqing, Zhao Jiapei. SELF-REINFORCED HP SILICON NITRIDE CERAMICS[J]. Acta Materiae Compositae Sinica, 1997, 14(2): 30-34.

Citation:

Li Fengmei, Guan Baoqing, Zhao Jiapei. SELF-REINFORCED HP SILICON NITRIDE CERAMICS[J]. Acta Materiae Compositae Sinica, 1997, 14(2): 30-34.

Citation:

Li Fengmei, Guan Baoqing, Zhao Jiapei. SELF-REINFORCED HP SILICON NITRIDE CERAMICS[J]. Acta Materiae Compositae Sinica, 1997, 14(2): 30-34.

Abstract

For the self-reinforced HP Si₃N₄ ceramics, the effects of(Y₂O₃+La₂O₃) wt% and the ratio between Y₂O₃ and La₂O₃ on the mechanical properties and microstructure were studied. Analysis of toughening processes indicated that both crack deflection and -Si₃N₄ bridging mechanisms can contribute to the fracture toughness of HP-Si₃N₄ ceramics. Inaddition, the oxidizing behavior and feature of subjecting to thermal cycling were studied in this paper.

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