多孔槽复合吸液芯制备及毛细性能研究
2021-06-06聂聪范东强段龙华王志威
聂聪 范东强 段龙华 王志威





摘要:本文通过采用电化学沉积方法,在铜沟槽管内表面制备得到多孔槽复合吸液芯。利用SEM对复合吸液芯进行微观形貌分析,并搭建吸液芯毛细性能测试平台,探究了電解液溶度对复合吸液芯毛细性能的影响。结果表明,电化学沉积制备的复合吸液芯毛细性能均优于沟槽吸液芯,其中电解液溶度为0.03mol/L时,复合吸液芯的毛细性能最好,毛细上升高度为46.5 mm,与沟槽吸液芯相比,毛细上升高度提升了52.3%。
Abstract: In this paper, a porous groove composite wick is fabricated on the inner surface of a copper grooved tube by using an electrochemical deposition method. SEM was used to analyze the morphology of the composite wick, and a test platform for the capillary performance of the wick was built, to explore the influence of electrolyte solubility on the capillary performance of the composite wick. The results show that the capillary performance of the composite wick fabricated by electrochemical deposition is better than that of the groove wick. When the electrolyte solubility is 0.03mol/L, the capillary performance of the composite wick is the best, and the capillary rise height is 46.5 mm, compared with the grooved wick, the capillary rise height is increased by 52.3%.
关键词:电化学沉积;多孔槽复合吸液芯;毛细性能
Key words: electrochemical deposition;porous groove composite wick;capillary performance
中图分类号:TK124 文献标识码:A 文章编号:1674-957X(2021)09-0025-03
0 引言
21世纪以来,随着科技的不断进步,各种电子元器件逐渐朝着微型化、高性能和集成化的方向发展。电子元器件长期处于高功耗和狭小的热散空间中,会导致电子元器件临界热流密度大幅增加,从而降低电子元器件的可靠性和使用寿命。热管作为一种相变传热元件,以其高导热系数、均温性好和热响应速度块等优点,被广泛的应用于智能手机、手提电脑、余热回收和航空航天等领域[1-4]。热管主要是由吸液芯、管壳和工质组成。其中,吸液芯的毛细性能对热管传热性能有重要影响[5-6]。常见的热管吸液芯有沟槽吸液芯、丝网吸液芯和金属粉末烧结吸液芯三类。其中,沟槽吸液芯具有较高的渗透率,工质流动阻力小,但毛细压力低,抗重力性能差;丝网吸液芯由于丝网不能与管壳紧密贴合,造成径向热阻过大;金属粉末吸液芯毛细压力大,抗重力性能好,但是工质流动阻力大[7-8]。……
