Sintering of Ni Powder-Coated Al2O3 Particles and Metal Infiltration into the Porous Sintered Body (高次制御材料-1-<特集>)
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概要
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Fabrication processes of metal-alumina composites were investigated with emphasis on the use of metal-coated alumina particles. Al<SUB>2</SUB>O<SUB>3</SUB> particles (mean diameter: 250μm and 45μm) were coated with Ni powder (mean diameter: 5μm) and/or W powder (mean diameter: 1μm) by an agglomeration coating technique and the pressed compacts were sintered. The coated particles gave Ni-Al<SUB>2</SUB>O<SUB>3</SUB> composites with more uniform microstructures compared with mechanically-mixed powders. W layer had to be localized at the surface of Al<SUB>2</SUB>O<SUB>3</SUB> to improve adhesion of Ni. The sintered bodies were porous. Molten Ni and Cu were Basely infiltrated into the pores, giving the dense composites of Al<SUB>2</SUB>O<SUB>3</SUB>-Ni and Al<SUB>2</SUB>O<SUB>3</SUB>-Ni-Cu systems.
- 社団法人 粉体粉末冶金協会の論文
著者
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Hojo J
Kyushu Univ. Fukuoka
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Hojo Junichi
Department Of Applied Chemistry Faculty Of Engineering Kyushu University
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Sagawa Osamu
Graduate School, Kyushu University
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Kimura Hideyoshi
Graduate School, Kyushu University
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Hojo Junichi
Department Chemistry & Biochemistry, Graduate School of Engineering, Kyushu University
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Hojo Junichi
Department of Chemical Science and Technology, Faculty of Engineering, Kyushu University
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