Microstructure and Mechanical Properties of Sintered Bodies of Fine Powders in Si3N4-TiN System.
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- Hojo Junichi
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
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- Eto Koji
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
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- Umezu Motohiro
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University
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- Kishi Kazushi
- Kyushu National Industrial Research Institute
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- Umebayashi Seiki
- Kyushu National Industrial Research Institute
書誌事項
- タイトル別名
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- Microstructure and Mechanical Propertie
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説明
Fine Si3N4 powder and Si3N4-TiN composite powder were prepared by vapor phase reaction method, and hot-pressed to investigate the effects of sintering condition and TiN inclusion on the microstructure and mechanical properties of sintered bodies. The prepared powders were fine with the size below 0.05μm. Hot-pressing was conducted at 1800-1850°C in N2 (1 atm) with 6wt% Y2O3 and 2wt% Al2O3 as sintering aid. When fine Si3N4 powder was sintered at 1800°C, the sintered body had a fine-grained microstructure. By increase in temperature to 1850°C, rod-like grains grew in the fine matrix, resulting in an increase in fracture toughness. Fine TiN particles were dispersed in Si3N4 matrix by sintering of Si3N4-TiN composite powder, indicating the formation of nanocomposite. In the composite system, the growth of rod-like grains was observed even at 1800°C. This suggests the acceleration of Si3N4 grain growth by TiN inclusion. The composite had a high fracture toughness.
収録刊行物
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- 粉体および粉末冶金
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粉体および粉末冶金 45 (1), 25-30, 1998
一般社団法人 粉体粉末冶金協会
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詳細情報 詳細情報について
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- CRID
- 1390282681285874688
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- NII論文ID
- 10002014854
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- NII書誌ID
- AN00222724
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- COI
- 1:CAS:528:DyaK1cXhtFOiu70%3D
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- ISSN
- 18809014
- 05328799
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- NDL書誌ID
- 4392658
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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