Thermal Conductivity of Al<sub>2</sub>O<sub>3</sub>/Cu Composites

Zeng Zhaofeng

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Thermal Conductivity of Al₂O₃/Cu Composites
Vol. 31, Issue 9, Pages: 797-799(2011)
Published： 2011 ，
DOI：

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[1]曾昭锋.Al_2O_3/Cu复合材料的导热性能研究[J].特种铸造及有色合金,2011,31(09):797-799.

Zeng Zhaofeng. Thermal Conductivity of Al₂O₃/Cu Composites. [J]. Special Casting & Nonferrous Alloys 31(9):797-799(2011)
[1]曾昭锋.Al_2O_3/Cu复合材料的导热性能研究[J].特种铸造及有色合金,2011,31(09):797-799. DOI：

Zeng Zhaofeng. Thermal Conductivity of Al₂O₃/Cu Composites. [J]. Special Casting & Nonferrous Alloys 31(9):797-799(2011) DOI：

摘要

利用高能球磨及粉末冶金法制备了Al2O3/Cu复合材料

采用双试样叠加激光脉冲法测试室温条件下的导热性能。研究发现

随着Al2O3体积分数的增加

热导率逐渐下降

特别是当Al2O3体积分数大于10%以后热导率急剧下降

这说明热导率受Al2O3含量影响很大。要获得良好导热性能的Al2O3/Cu复合材料

应该严格控制Al2O3颗粒的体积分数不高于10%

尽量提高致密度

减少烧结体内的位错、空隙等缺陷。

Abstract

Al2O3/Cu composites were fabricated by high-energy ball milling and powder metallurgy method.Thermal conductivity of the composites at room temperature was investigated with double-specimens by laser pulse superposition method.It is found that thermal conductivity of the composites is decreased gradually with increasing in Al2O3 volumetric fraction

especially the volumetric fraction of Al2O3 more than 10%

which verifies the close relation of Al2O3 content with the thermal conductivity of the composites.Thermal conductivity is seriously dependent on interior defects and density of the composites.To obtain the Al2O3/Cu composites with desirable thermal behavior

it is considered by controlling the volumetric fraction of Al2O3 lower than 10% and improving density as well as decreasing the dislocation and voids in the preforms.