Rare Metals

, 28:646

Effect of particle size on the microstructure and thermal conductivity of Al/diamond composites prepared by spark plasma sintering

  • Ke Chu
  • Chengchang Jia
  • Xuebing Liang
  • Hui Chen
  • Wenjia Gao
Article

DOI: 10.1007/s12598-009-0123-2

Cite this article as:
Chu, K., Jia, C., Liang, X. et al. Rare Metals (2009) 28: 646. doi:10.1007/s12598-009-0123-2

Abstract

Spark plasma sintering (SPS) was used to fabricate Al/diamond composites. The influence of diamond particle size on the microstructure and thermal conductivity (TC) of composites was investigated by combining experimental results with model prediction. The results show that both composites with 40 µm particles and 70 µm particles exhibit high density and good TC, and the composite with 70 µm particles indicates an excellent TC of 325 W·m−1·K−1. Their TCs lay between the theoretical estimated bounds. In contrast, the composite with 100 µm particles demonstrates low density as well as poor TC due to its high porosity and weak interfacial bonding. Its TC is even considerably less than the lower bound of the predicted value. Using larger diamond particles can further enhance thermal conductive performance only based on the premise that highly dense composites of strong interfacial bonding can be obtained.

Keywords

metal matrix composites thermal properties sintering particle size 

Copyright information

© Journal Publishing Center of University of Science and Technology Beijing and Springer Berlin Heidelberg 2009

Authors and Affiliations

  • Ke Chu
    • 1
  • Chengchang Jia
    • 1
  • Xuebing Liang
    • 1
  • Hui Chen
    • 1
  • Wenjia Gao
    • 1
  1. 1.School of Material Science and EngineeringUniversity of Science and Technology BeijingBeijingChina

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