Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (6): 29-35.doi: 10.3969/j.issn.1000-565X.2011.06.006

• Mechanical Engineering • Previous Articles     Next Articles

Forming Technology of Composite Capillary Wick Structure for Heat Column and Its Optimization

Tao Su-lian1,2  Tang Yong1   

  1. 1. School of Mechanical and Automotive Engineering∥Key Laboratory of Surface Functional Structure Manufacturing of Guangdong Higher Education Institutes,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Department of Mechanical Engineering,Guangdong Technical College of Water Resources and Electric Engineering,Guangzhou 510635,Guangdong,China
  • Received:2010-11-23 Revised:2011-01-14 Online:2011-06-25 Published:2011-05-06
  • Contact: 陶素连(1979-) ，女，博士生，讲师，主要从事微电子热控制研究． E-mail:taosulian@ sina.com.cn
  • About author:陶素连(1979-) ，女，博士生，讲师，主要从事微电子热控制研究．
  • Supported by:

    国家自然科学基金资助项目( 50930005) ; NSFC-广东省人民政府自然科学联合基金重点资助项目( U0834002)

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Abstract:

In order to dissipate the high heat flux of microelectronic chips,a heat column with composite capillary wick was designed by manufacturing stagger microgrooves at the evaporation and the condensation ends of the heat column via ploughing-extrusion ( P-E) and by sintering a layer of copper fiber on the microgrooves. Then,the effects of P-E parameters on the formation of microgrooves at the evaporation end,as well as the effects of sintering
parameters on the sintering layer,were discussed by comprehensively analyzing the forming process of the wick. The results show that ( 1) the surface morphology of microgrooves becomes better at a large P-E depth or a suitable microgroove distance in a certain range; ( 2) the optimal boiling-enhanced microgroove structure is obtained at a cutting feed of 0. 45mm/r,an interior angle of radial microgroove of 3° and a P-E depth of 0. 3mm; ( 3) the optimal condensation-enhanced microgroove structure is obtained at a P-E depth of 0. 3 mm,a cutting feed of 0. 50mm/r and an axial micro groove spacing of ( 1 /180) rad; and ( 4) the sintered layer is of the optimal sintering performance and the strongest conjuncting ability to the tube wall when it is sintered with a heating rate of 5℃ /s at 950℃ for 60min.

Key words: heat column, forming technology, microgroove, capillary wick, sintering, copper fiber

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