Comparison between oxide-reduced and water-atomized copper powders used in making sintered wicks of heat pipe--颗粒学报PARTICUOLOGY

Chiu, L.-H., Wu, C.-H., & Lee, P.-Y. (2007). Comparison between oxide-reduced and water-atomized copper powders used in making sintered wicks of heat pipe. China Particuology, 5(3), 220–224. https://doi.org/10.1016/j.cpart.2007.04.001

Comparison between oxide-reduced and water-atomized copper powders used in making sintered wicks of heat pipe

Liu-Ho Chiu ^a *, Chang-Hui Wu ^a, Pee-Yew Lee ^b

a Department of Materials Engineering, Tatung University, Taipei 10451, Taiwan, China
b Institute of Materials Engineering, Taiwan Ocean University, Keelung, Taiwan, China

10.1016/j.cpart.2007.04.001

Volume 5, Issue 3, June 2007, Pages 220-224

Received 25 October 2006, Accepted 4 April 2007, Available online 6 June 2007.

E-mail: lhchiu@ttu.edu.tw

Highlights

Abstract

Oxide-reduced copper powder can be produced efficiently at low cost. The volume shrinkage, porosity, maximum pore size, permeability and thermal conductivity of wicks sintered from two oxide-reduced (OR) powders were compared with one from water-atomized (WA) powder. The green specimens were sintered at temperatures from 800 to 1000 °C in a tube furnace under a reduction stream of 10% hydrogen and 90% argon. The results show that the property variations of OR − 100 and WA wicks due to porosity changes have a similar tendency and range. Nine hundred degree celsius is a recommended sintering temperature for producing ideal wicks for use in heat pipes. A smaller maximum pore size can be obtained by increasing the green density.

Graphical abstract

Keywords

Sintered wick; Copper powder; Porous property; Oxide-reduced powder

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