5G基站散热器用高导电(热)压铸Al-Si-Fe铝合金的热力学设计与试验
Thermodynamic Design and Experiment on High Conductivity Die-casting Al-Si-Fe Aluminum Alloy for 5G Base Station Heat Sink
杨爽 1吴峻杰 1王朦朦 2黄仲佳 1刘桐 1赵禹 1洪荣辉 3姚英武 3王俊4
作者信息
- 1. 安徽工程大学材料科学与工程学院,芜湖 241000
- 2. 安徽工程大学材料科学与工程学院,芜湖 241000;上海交通大学材料科学与工程学院,上海 200240
- 3. 安徽舜富精密科技股份有限公司,芜湖 241000
- 4. 上海交通大学材料科学与工程学院,上海 200240
- 折叠
摘要
针对5G基站中压铸铝散热壳体强度与电(热)导率之间的倒置问题,通过热力学计算与试验研究相结合,利用PANDAT热力学计算、金相显微镜、扫描电镜、X射线衍射仪以及透射电镜研究了时效处理对压铸Al-7.5Si-0.8Fe铝合金的显微组织以及导电性能的影响.结果表明,320℃×1 h时效处理能够显著提升压铸铝合金的电导率,时效组织中沿晶界和晶内分别析出了Al-Fe-Si三元相和Si相,降低了Fe、Si元素在铝基体中的固溶度.另外,经过时效处理,共晶Si网链连续性变差、铝基体的连通性增强也是电导率提升的主要原因.
Abstract
In view of the inversion problem between strength and electrical(thermal)conductivity of die-cast alumi-num heat sinks in 5G base stations,effects of aging treatment on microstructure and conductivity of die-cast Al-7.5Si-0.8Fe aluminum alloys were investigated through a combination of thermodynamic calculations and experimental research by PANDAT thermodynamic calculations,metallographic microscopy,scanning electron microscopy,X-ray diffraction,and transmission electron microscopy.The results indicate that the conductivity of alloy is significantly improved after heat aging treatment at 320℃ for 1 h.Al-Fe-Si ternary phases and Si phase are precipitated along the grain boundaries and interior,respectively,thus reducing the solid solubility of Fe and Si in Al matrix.In addition,the continuity of eutectic Si network is deteriorated after aging,accompanied with the increased connectivity of the alumi-num matrix,which is the main reason for the enhancement of conductivity.
关键词
压铸铝合金/散热器/热导率/电导率/热力学计算Key words
Die-cast Aluminum Alloy/Heat Sinks/Thermal Conductivity/Conductivity/Thermodynamic Calculation引用本文复制引用
基金项目
安徽省高校科学研究资助项目(2022AH050956)
安徽工程大学校级启动基金资助项目(S02202269)
芜湖市揭榜挂帅资助项目(2021hg08)
出版年
2024
NETL
NSTL
万方数据