Journal
COMPOSITES PART B-ENGINEERING
Volume 42, Issue 5, Pages 1029-1034Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2011.03.028
Keywords
Metal-matrix composites (MMCs); Particle-reinforcement; Thermal properties; Sintering
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Diamond particle dispersed aluminum (Al) matrix composites were fabricated in solid-liquid coexistent state from the powder mixture of diamond, pure Al and 5056-type Al-Mg alloy by spark plasma sintering (SPS) process. Microstructures and thermal conductivities of the composites fabricated were examined. These composites can be well consolidated at 813 K for 0.6 k s and scanning electron microscopy detects no reaction at the interface between the diamond particle and the Al matrix. The relative packing density of the diamond-Al composite fabricated was 97% or higher in a volume fraction range of diamond between 25.5 and 45.5%. The thermal conductivity of the Al matrix composite containing 45.5 vol.% diamond reached 403 W/mK, approximately 76% the theoretical thermal conductivity estimated by Maxwell-Eucken's equation. (C) 2011 Elsevier Ltd. All rights reserved.
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