闭孔泡沫铝的导热性能  

THERMAL CONDUCTIVITY OF CLOSED-CELL ALUMINUM ALLOY FOAM

作　　者：凤仪[1] 朱震刚[2] 陶宁[3] 郑海务[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009 [2]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 [3]中国科学技术大学化学物理系,合肥230026

出　　处：《金属学报》2003年第8期817-820,共4页Acta Metallurgica Sinica

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.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.

关 键 词：闭孔泡沫铝 孔隙率 孔径 导热系数 

分 类 号：TG113.22[金属学及工艺—物理冶金] TB331[金属学及工艺—金属学]