材料科学
热导率
复合材料
铝
退火(玻璃)
传热
碳纤维
电子设备和系统的热管理
声子
无定形固体
多孔性
复合数
热力学
凝聚态物理
物理
工程类
化学
有机化学
机械工程
作者
Bin Wang,Yaotian Yan,Jinghuang Lin,Yi Cai,Jian Cao,Junlei Qi
出处
期刊:Carbon
[Elsevier]
日期:2023-06-01
卷期号:210: 118040-118040
被引量:11
标识
DOI:10.1016/j.carbon.2023.118040
摘要
Efficient multi-path heat dissipation is urged to be designed for balancing the heat density generated in highly integrated electronic devices. Herein, aluminum foam/carbon composites were fabricated by chemical bath and annealing method to realize the effect of strengthening the effective thermal conductivity while retaining the convective heat transfer characteristics of the porous structure. The results show that the continuous and high crystalline carbon coating can be obtained in the optimized composites prepared with 350 g dopamine addition at 600 °C annealing temperature. When compared with amorphous carbon, the phonons in crystalline carbon can carry more energy during the heat transport in terms of high phonons density of states, and their scattering behavior can be alleviated. A smaller temperature gradient is further established in the system. Hence, a desirable thermal conductivity, 21.44 W m−1 K−1, is obtained in the optimized composites, which is almost 3 times that of pristine aluminum foam (7.67 W m−1 K−1). Additionally, the remarkable cooling efficiency of 24.71% in comparison to other studies, suggests that aluminum foam/carbon composites hold great potential as thermal management materials in addressing the issue of intense heat generation.
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