闭孔泡沫纯铝的导热性能
Thermal Conductivity Property of Closed-cell Pure Aluminum Foam
摘 要
采用隔热测试仪研究了闭孔泡沫纯铝的孔隙率和孔径对其导热性能(导热系数)的影响.结果表明:闭孔泡沫纯铝的导热性能受传导、对流、辐射三者的综合影响;孔隙率为83.2%~91.0%的闭孔泡沫纯铝的导热系数随孔隙率的增大而减小,而孔径对导热系数的影响没有一定规律;在孔隙率为83.2%~91.0%、孔径为2.5~5.3 mm时,闭孔泡沫纯铝的导热系数在常温下为0.297~0.752 W/(m·K).
孔隙率
导热系数
closed-cell pure aluminum foam
porosity
thermal conductivity coefficient
Abstract
The thermal conductivity coefficient of closed-cell pure aluminum foam was measured as a function of porosity and cell size. The results show that the thermal conductivity property of the closed-cell pure aluminum foam was influenced by conduction,convection and radiation. The thermal conductivity coefficient of closed-cell pure aluminum foam decreased with the increase of porosity,and the cell size showed no obvions influence on the thermal conductivity coefficient. The thermal conductivity coefficient of samples with porosity of 83.2%-91.0% and cell size of 2.5-5.3 mm at room temperatare was 0.297-0.752 W/(m·K).
中图分类号 TG113.22 TB331
所属栏目 材料性能及其应用
基金项目
收稿日期 2008/4/30
修改稿日期 2008/11/16
网络出版日期
作者单位点击查看
备注赵军(1973-),男,辽宁义县人,博士.
引用该论文: ZHAO Jun,HE De-ping. Thermal Conductivity Property of Closed-cell Pure Aluminum Foam[J]. Materials for mechancial engineering, 2009, 33(4): 76～78
赵军,何德坪. 闭孔泡沫纯铝的导热性能[J]. 机械工程材料, 2009, 33(4): 76～78
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参考文献
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【3】ASHBY M F,EVANS A G,FLECK N A,et al. Metals Foams,a Design Guide[M].Oxford: Butterworth Heinemann,2000.
【4】何思渊,臧晓云,何德坪.轻质能量吸收器[J].中国科学B辑,2005,35(4):265-267.
【5】BANHART J. Manufacture,characterization and application of cellular metals and metal foams[J].Progress in Materials Science,2001,46:559-562.
【6】LU T J,STONE H A,ASHBY M F. Heat transfer in open-cell metal foams[J].Acta Mater,1998,46(10):3619-3635.
【7】BABESAN N,KADAR C,MEGMAN N. Characterization of thermal and electric properties of Al foams[C]//Berlin International Conference on Cellular Metals and Metal Foaming Technology. Borlin:[s.n.],2003.
【8】凤仪,朱震刚,陶宁,等.闭孔泡沫铝的导热性能[J].金属学报,2003,39(8):817-820.
【9】郑明军,何德坪.胞状纯铝与胞状铝合金的准静态压缩性能[J].机械工程材料,2005,29(5):57-60.
【10】杨世铭.传热学[M].北京:高等教育出版社,1991:420.
【11】陈克建,洪荣泽.新型轻质保温材料[M].成都:四川科学技术出版社,1985:185-187.
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