Thermal properties of open-celled aluminum foams prepared by two infiltration casting methods
来源期刊：中南大学学报(英文版)2014年第7期
论文作者：WANG Hui(王辉) ZHOU Xiang-yang(周向阳) LONG Bo(龙波) WEN Kang(文康) YANG Tao(杨焘)
文章页码：2567 - 2571
Key words：open-celled aluminum foams; counter-gravity infiltration casting; thermal conductivity coefficient; particle size; porosity
Abstract: Contrastive research was carried out to study the thermal properties of open-celled aluminum foams prepared by counter-gravity infiltration casting system and the traditional process respectively. The experimental results show that the thermal conductivity coefficients of aluminum foams prepared by two different infiltration methods have similar increasing trend with the increase of particle size; along with the reducing porosity, the thermal conductivity coefficients will be enhanced oppositely. However, with the same particle size, the open-celled aluminum foam prepared by the former method has a higher thermal conductivity coefficient obviously. It is largely because that the sample prepared by counter-gravity infiltration casting has a lower void content and better dense crystallization of metal-matrix after the constant pressure process.
WANG Hui(王辉), ZHOU Xiang-yang(周向阳), LONG Bo(龙波), WEN Kang(文康), YANG Tao(杨焘)
(School of Metallurgy and Environment, Central South University, Changsha 410083, China)
Abstract:Contrastive research was carried out to study the thermal properties of open-celled aluminum foams prepared by counter-gravity infiltration casting system and the traditional process respectively. The experimental results show that the thermal conductivity coefficients of aluminum foams prepared by two different infiltration methods have similar increasing trend with the increase of particle size; along with the reducing porosity, the thermal conductivity coefficients will be enhanced oppositely. However, with the same particle size, the open-celled aluminum foam prepared by the former method has a higher thermal conductivity coefficient obviously. It is largely because that the sample prepared by counter-gravity infiltration casting has a lower void content and better dense crystallization of metal-matrix after the constant pressure process.
Key words:open-celled aluminum foams; counter-gravity infiltration casting; thermal conductivity coefficient; particle size; porosity
