Processing of diamond-particle-dispersed silver-matrix composites in solid-liquid co-existent state by SPS and their thermal conductivity

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• 作者：Kiyoshi Mizuuchi^a ; ^{mizuuchi@omtri.or.jp} ; Kanryu Inoue^b ; Yasuyuki Agari^a ; Masami Sugioka^a ; Motohiro Tanaka^a ; Takashi Takeuchi^a ; Masakazu Kawahara^c ; Yukio Makino^c ; Mikio Ito^d
• 关键词：A. Metal-matrix composites (MMCs) ; A. Particle-reinforcement ; B. Thermal properties ; E. Sintering
• 刊名：Composites Part B ; Engineering
• 出版年：2012
• 期刊代码：18_13598368
• 类别：ms
• 出版时间：April, 2012
• 卷：43
• 期：3
• 页码：1445-1452
• 文件大小：1885 K

摘要

Diamond-particle-dispersed silver (Ag) matrix composite was fabricated in a unique fabrication method, where solid-liquid coexistent state of the powder mixture of diamond, pure Ag and pure Si was designed to create during spark plasma sintering (SPS) process. The composite is well consolidated in a temperature range between 1113 K and 1188 K and no reaction was detected by scanning electron microscopy at the interface between diamond particles and the Ag matrix. The relative packing density of the diamond-Ag composite fabricated was 95-97%in a volume fraction range of diamond between 40%and 50%. The thermal conductivity of the diamond-Ag composite containing 50 vol.%(v/o) diamond reached 717 W/mK, approximately 80%the theoretical thermal conductivity calculated by Maxwell-Eucken鈥檚 equation. This result suggests that the solid-liquid co-existent state during SPS consolidation is very effective not only for rapid densification of the composite but also for producing strong bonding between the diamond particles and the Ag matrix.