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Effect of volume fraction and sintering temperature on thermal conductivity of (AlSiTiCrNiCu) p / 6061Al composites
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Guangdong Key Laboratory for Advanced Metallic Mateirals Processing,South China University of Technology

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    Abstract:

    High-entropy alloy with high hardness, high strength, wear resistance, corrosion resistance, high temperature heat stability and other excellent performance owing to the metal - metal interface between the natural characteristics of high entropy alloy and aluminum alloy ,has a good wetting interface. In this paper, AlSiTiCrNiCu high-entropy alloy particles were used as the reinforced phase to reinforce aluminum alloy in order to study the effect of high-entropy alloy volume fraction and sintering temperature on the thermal conductivity of the composites. The result shows that the thermal conductivity of (AlSiTiCrNiCu) p / 6061Al composites decreases with the increase of the volume fraction of AlSiTiCrNiCu particles, and the thermal conductivity of (AlSiTiCrNiCu) p / 6061Al composites is 61.59 W / (m ? K) , Compared to the matrix 6061Al alloy decreased by 52%. When the volume fraction is 10%, the thermal conductivity of the composites decreases with the sintering temperature, and the thermal conductivity of the composites is 65.80 W / (m ? K) when the sintering temperature is 540 ℃. By TEM analysis, the type of the interface between high-entropy alloy and aluminum alloy is the diffusion interface and it doesn’t occur any interface product , which contributes to the reduction of thermal conductivity.

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[Zhu Dezhi, Qi Longfei, Ding Xia. Effect of volume fraction and sintering temperature on thermal conductivity of (AlSiTiCrNiCu) p / 6061Al composites[J]. Rare Metal Materials and Engineering,2019,48(2):614~619.]
DOI:10.12442/j. issn.1002-185X.20170487

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History
  • Received:June 07,2017
  • Revised:July 18,2017
  • Adopted:August 18,2017
  • Online: March 15,2019
  • Published: