Preparation of Nickel-Alumina Composite Using the Metal-Coated Particles (超硬質材料<特集>)
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概要
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Al<SUB>2</SUB>O<SUB>3</SUB> particles (mean diameter: 250μm) were coated with fine Ni particles (mean diameter: 5μm) by an agglomeration coating technique. The Ni content was 40-50vol%. The compact of the coated particles was sintered at a temperature of 1200°-1500°C. The use of the coated particles resulted in uniform dispersion of Al<SUB>2</SUB>O<SUB>3</SUB> particles in Ni matrix. The pre-coating of Al<SUB>2</SUB>O<SUB>3</SUB> particles with fine W particles (mean diameter: 1μm) was effective to improve the adhesion and wettability of Ni to Al<SUB>2</SUB>O<SUB>3</SUB>. Although the relative density of the sintered body was 70-80%, the dense composite was produced by the infiltration of molten Ni into the porous sintered body.
- 社団法人 粉体粉末冶金協会の論文
著者
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HOJO Junichi
Kyushu University
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Hojo J
Kyushu Univ. Fukuoka
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Sagawa Osamu
Kyushu Univ., Eng.
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Kimura Hideyoshi
Kyushu Univ., Eng.
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Kato Akio
Kyushu Univ., Eng.
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- Preface
- Change of Morphology during Heating of Amorphous Composite Powder in Si3N4-BN System (特集 アモルファス・ナノ結晶制御と高機能材料)
- Microstructure and Fracture Toughness of Sintered Bodies from Fine SiC Powder and SiC-TiC Composite Powder (特集 ナノ構造制御と新機能発現)
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- Sintering of Ni Powder-Coated Al2O3 Particles and Metal Infiltration into the Porous Sintered Body (高次制御材料-1-)
- Preparation of Nickel-Alumina Composite Using the Metal-Coated Particles (超硬質材料)
- Oxidation Mechanism of SiC Refractories at High Temperature