Journal of Materials Science

, Volume 44, Issue 16, pp 4370–4378 | Cite as

Experimental and modeling study of the thermal conductivity of SiCp/Al composites with bimodal size distribution

  • Ke ChuEmail author
  • Chengchang Jia
  • Xuebing Liang
  • Hui Chen
  • Hong Guo
  • Fazhang Yin
  • Xuanhui Qu


The thermal conductivity of SiCp/Al composites with high volume fractions of 46 to 68% has been investigated. The composites were fabricated by pressureless infiltrating liquid aluminum into SiC preforms with monomodal and bimodal size distributions. The density measurement indicates that a small amount of pores is presented for the composites approaching their maximum volume fractions. An analytical model with an explicit expression is proposed for describing the thermal conductive behavior of the composites with multimodal-reinforced mixtures in terms of an effective medium approach taking into account the porosity effect. Predictions of the developed effective medium expression reveal good correspondence with the experimental results, and explore how each of the considered factors (i.e., particle size ratio, volume fraction ratio, and porosity) can have a significant effect on the thermal conductivity of the composites with bimodal mixtures.


Particle Volume Fraction Interfacial Thermal Resistance Bimodal Size Distribution Effective Medium Approximation Powder Injection Molding 



This study is financially supported by National 863 Plan Project of China (No. 2008AA03Z505). The authors would like to thank Prof. H. Guo, from Beijing Research Institute of Nonferrous Metals, for the supply of SiC powders and performing the pressureless infiltrations.


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Ke Chu
    • 1
    Email author
  • Chengchang Jia
    • 1
  • Xuebing Liang
    • 1
  • Hui Chen
    • 1
  • Hong Guo
    • 2
  • Fazhang Yin
    • 2
  • Xuanhui Qu
    • 1
  1. 1.School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.Beijing General Research Institute for Nonferrous MetalsBeijingChina

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