Development of sintered Ni-Cu wicks for loop heat pipes
Development of sintered Ni-Cu wicks for loop heat pipes
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DOI：
10.1007/s11431-009-0180-7
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
G. Xin;Kehang Cui;Y. Zou;Lin Cheng
中科院分区：
文献类型：
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作者：
G. Xin;Kehang Cui;Y. Zou;Lin Cheng
采用冷压烧结和直接松散烧结两种不同的方法制备了一系列环状热管用毛细管芯，实验研究了不同工艺、不同成分和不同烧结工艺参数对毛细管芯的气孔率、透气性和气孔半径的影响。用阿基米德法和扫描电子显微镜(SEM)分别测定了材料的孔隙率和孔径。用经验公式计算比较了芯材的渗透率。结果表明，采用两种不同的方法均能成功制备出毛细管芯，最佳工艺条件为：采用直接松散烧结工艺，在650℃下烧结30min，镍含量为90%，铜含量为10%。芯材的气孔率为70.07%，磁导率为10−13m2数量级，平均孔径为0.54μm。
The present study fabricated a series of capillary wicks for loop heat pipes (LHPs), using two different methods, the cold-pressing sintering and direct loose sintering, and experimentally investigated the effect of different methods, compositions and sintering parameters on their properties in terms of porosity, permeability and pore radius. Porosity and pore radius were measured by the Archimedes method and Scanning Electron Microscope (SEM), respectively. Permeability of the wicks was compared by calculation using empirical equation. Results show that capillary wicks were successfully fabricated by using two different methods; the optimal capillary wick was found to be sintered at 650°C for 30 min, using direct loose sintering technique, with 90% nickel and 10% copper. The wicks could reach the porosity of 70.07% and the permeability of 10−13m2order, with mean pore radius of 0.54 μm.