Hot Isostatic Processing of Shocked Si3N4 Powder |
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| Authors: | Shigeyuki S&#;miya Masahiro Yoshimura Shutaro Fujiwara Ken-Ichi Kondo Akira Sawaoka Takeo Haitori Jun-Ichi Mohri Masatada Araki |
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| Affiliation: | Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Midori, Yokohama 227, Japan;Department of Industrial Chemistry, Faculty of Engineering, Chiba University 1-33 Yayoi, Chiba 260, Japan;Taketoyo Plants, Nippon Oil and Fats Co. Ltd., Taketoyo, Aichi 470-23, Japan |
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| Abstract: | To enhance the sinter ability of Si3N4, powders mixed with 0, 2, and 5 wt% Y2O3 were explosively shock-treated. Compacts of these powders were encapsulated in 96% silica glass containers and isostatically hot-pressed. The shocked Si3N4 with 5 wt% Y2O3 was pressed to a density of 3.09 g/cm3 (95.4% of theoretical) at 1400°C under 430 MPa for 3 h, whereas the unshocked material attained only 82.4% of theoretical density under the same hot isostatic pressing conditions. |
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