| 闭孔泡沫铝的导热性能 |
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| 引用本文： | 凤仪,朱震刚,陶宁,郑海务. 闭孔泡沫铝的导热性能[J]. 金属学报, 2003, 39(8): 817-820 |
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| 作者姓名： | 凤仪 朱震刚 陶宁 郑海务 |
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| 作者单位： | 合肥工业大学材料科学与工程学院,合肥,230009;中国科学院固体物理研究所内耗和晶体缺陷开放实验室,合肥,230032;中国科学技术大学化学物理系,合肥,230026 |
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| 摘 要： | 研究了孔隙率、孔径对闭孔泡沫铝合金导热系数的影响，结果表明，由于大量孔洞的存在，泡沫铝的导热系数较同样成分的实体材料显著下降，孔隙率在0．80—0.93范围内，约为实体材料的1／30—1／80，随着孔隙率的增加，导热系数迅速下降，而孔径对泡沫铝的导热系数影响不大．从串-并联和并-串联模型出发，分析了孔隙率对泡沫铝材料导热系数的影响，发现串-并联模型更能反映泡沫铝的结构特征，与实测值吻合更好。
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| 关 键 词： | 闭孔泡沫铝 孔隙率 孔径 导热系数 |
| 文章编号： | 0412-1961(2003)08-0817-04 |
| 修稿时间： | 2002-10-26 |
THERMAL CONDUCTIVITY OF CLOSED-CELL ALUMINUM ALLOY FOAM |
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| FENG Yi ZHU Zhengang,TAO Ning ZHEN Haiwu) School of Materials Science and Engineering,Hefei University of Technology,Hefei ) Laboratory of Internal Friction and Defects in Solids. THERMAL CONDUCTIVITY OF CLOSED-CELL ALUMINUM ALLOY FOAM[J]. Acta Metallurgica Sinica, 2003, 39(8): 817-820 |
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| Authors: | FENG Yi ZHU Zhengang TAO Ning ZHEN Haiwu) School of Materials Science Engineering Hefei University of Technology Hefei ) Laboratory of Internal Friction Defects in Solids |
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| Affiliation: | FENG Yi ZHU Zhengang,TAO Ning ZHEN Haiwu1) School of Materials Science and Engineering,Hefei University of Technology,Hefei 2300092) Laboratory of Internal Friction and Defects in Solids,Institute of Solid State Physics,The Chinese Academy of Sciences,Hefei 2300323) Department of Chemical Physics,University of Science and Technology of China,Hefei 230026 |
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| Abstract: | The thermal conductivity of aluminum alloy foam has been measured as a function of cell size and relative density. The results show that the thermal conductivity of foam rapidly decreases with the increase of porosity and is about 1/30-1/80 of the solid material. The cell size has a minor influence on the thermal conductivity of foam and appears to have a negligible effect. The dependence of the thermal conductivity of aluminum alloy foam on porosity can be described by the series-parallel and the parallel-series models. The experimental results show that the series-parallel model is more suitable. |
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| Keywords: | closed-cell aluminum alloy foam porosity cell size thermal conductivity |
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