烧结式微热管吸液芯的成型方法  

Forming Method of Sintered Wick in Micro Heat Pipe

作　　者：李西兵[1] 李勇[1] 汤勇[1] 周述璋[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2008年第10期114-119,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金重点资助项目(50436010);国家自然科学基金资助项目(50675070);国家自然科学基金资助项目(50705031);广东省自然科学基金资助项目(07118064)

摘　　要：目前电子芯片对散热的要求越来越高，烧结式吸液芯微热管已经成为电子芯片理想的散热元件．文中分析了铜粉颗粒在吸液芯中的成型机理，探讨了烧结式微热管吸液芯毛细结构的制造工艺，解决了吸液芯成型温度与成型时间的确定，以及烧结时芯棒的固定、抽出与铜粉颗粒的填充等相关问题．结果表明，采用所提出的制造工艺在900—950℃下烧结30～60min得到的吸液芯具有铜粉颗粒分布均匀、对称性好、生产效率高、成本低等优点，并且制成的微热管具有很好的传热性能．With the increasing demand for the cooling of electronic chips, the micro heat pipe with the sintered wick has become an ideal heat radiator. In order to accurately determine the forming temperature and time of the sintered wick and to offer methods for the fixation and extraction of the mandrel as well as the infilling of copper powders, this paper analyzes the forming mechanism of copper powders in the wick and investigates the manufacturing process of the capillary structure of the sintered wick in the micro heat pipe. The results indicate that, by the proposed manufacturing process, the wicks sintered at 900 -950 ℃ for 30 - 60 min are of well-proportioned distribution, good symmetry, high production efficiency and low production cost, and that micro heat pipes fabricated with such sintered wicks are of good heat transfer performance.

关 键 词：微热管 吸液芯 成型机理 烧结 制造工艺 

分 类 号：TK124[动力工程及工程热物理—工程热物理]