Design and fabrication of sintered wick for miniature cylindrical heat pipe

作     者：蒋乐伦 汤勇 周伟 蒋琳珍 肖潭 李燕 高金武 Le-lun JIANG;Yong TANG;Wei ZHOU;Lin-zhen JIANG;Tan XIAO;Yan LI;Jin-wu GAO

作者机构：中山大学工学院广州510006 华南理工大学机械与汽车学院广州510640 义乌工商学院外国语学院义乌322000 

基　　金：Project(50905119)supported by the National Natural Science Foundation of China Project(20120171120036)supported by New Teachers'Fund for Doctor Stations,Ministry of Education,China Project(S2012040007715)supported by Natural Science Foundation of Guangdong Province,China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2014年第24卷第1期

页      码：292-301页

摘      要：Miniature cylindrical metal powder sintered wick heat pipe （sintered heat pipe） is an ideal component with super-high thermal efficiency for high heat flux electronics cooling. The sintering process for sintered wick is important for its quality. The sintering process was optimally designed based on the equation of the heat transfer limit of sintered heat pipe. Four-step sintering process was proposed to fabricate sintered wick. The sintering parameters including sintering temperature, sintering time, sintering atmosphere and sintering position were discussed. The experimental results showed that the proper sintering temperature was 950 ℃ for Cu powder of 159μm and 900 ℃ for Cu powders of 81 and 38 μm, respectively, while the wick thickness was 0.45 mm and sintering time was 3 h. The optimized sintering time was 3 h for 0.45 and 0.6 mm wick thickness and 1 h for 0.75 mm wick thickness, respectively, when copper powder diameter was 159μm and sintering temperature was 950 ℃. Redox reduction reaction between H2 and CuO during sintering could produce segmentation cracks in Cu powders as a second structure. Sintering at vertical position can effectively avoid the generation of gap between wick and the inner wall of pipe.

主 题 词：heat pipe wick sintering porosity shrinkage 

学科分类：08[工学] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/S1003-6326(14)63060-0

馆 藏 号：203674002...