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《Powder Metallurgy Technology》 2012-01
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Research on increasing porosity and strengthening matrix of copper wick used for heat pipe

Cheng Qijun1),2),Ou Yaohui1),Zhou Shuibo1),Wang Dezhi2) 1)(Sany Heavy Industry Limited Company,Changsha 410100,China) 2)(School of Materials Science and Engineering,Central South University,Changsha 410083,China)  
A contrast test of sintered wicks with different particle size of Cu powder and different pore-forming material(CuCl2·2H2O,NaCl) and content was conducted.The porosity,permeability and compressibility were measured.The pore morphology and sintering neck were characterized with field emission scanning electron microscope(FESEM),the mechanism of sintering aggrandizement in hydrogen reduction atmosphere were discussed.Experimental results show that the porosity,maximum pore size and permeability of sintered wicks are increased,but the strength and plasticity of the wicks are decreased with increasing particle size of spherical powder.Addition of CuCl2·2H2O play a role in pore-forming and strengthening the matrix,but addition of NaCl has pore-forming effect only.
【CateGory Index】: TF125.6
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