粉体および粉末冶金
Online ISSN : 1880-9014
Print ISSN : 0532-8799
研究速報
持続型固-液共存状態を利用してSPS成形したダイヤモンド粒子分散型Al基複合材料の熱的特性
水内 潔井上 漢龍上利 泰幸森貞 好昭杉岡 正美田中 基博武内 孝谷 淳一川原 正和巻野 勇喜雄
著者情報
ジャーナル オープンアクセス

2009 年 56 巻 7 号 p. 438-443

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Diamond-particle-dispersed-aluminum (Al) matrix composites were fabricated in continuous solid-liquid co-existent state by Spark Plasma Sintering (SPS) process from the mixture of diamond powders, pure Al powders and Al-5mass%Si alloy powders. The microstructures and thermal conductivities of the composites fabricated were examined. These composites were all well consolidated by heating at a temperature range between 798 K and 876 K for 1.56 ks during SPS process. No reaction at the interface between the diamond particle and the Al matrix was observed by scanning electron microscopy for the composites fabricated under the sintering conditions employed in the present study. The relative packing density of the diamond-Al composite fabricated was 99 % or higher in a volume fraction range of diamond between 45 % and 50 %. Thermal conductivity of the diamond-Al composite containing 50 vol.% diamond reached 552 W/mK, approximately 95 % the theoretical thermal conductivity estimated using Maxwell-Eucken's equation. The coefficient of thermal expansion of the composites fell in the upper line of Kerner model, indicating strong bonding between the diamond particle and the Al matrix in the composite.

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© 2009 一般社団法人粉体粉末冶金協会
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