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周增林,何学良,李艳,惠志林,谢元锋.扩散阴极用多孔钨基体材料的评述[J].稀有金属材料与工程(英文),2019,48(7):2386~2392.[Zhou Zenglin,He Xueliang,Li Yan,Hui Zhilin and Xie Yuanfeng.Review on the Porous Tungsten Matrix Materials of Dispenser Cathodes[J].Rare Metal Materials and Engineering,2019,48(7):2386~2392.]
Review on the Porous Tungsten Matrix Materials of Dispenser Cathodes
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Received:January 27, 2018  Revised:March 08, 2018
Key words: dispenser cathodes  porous tungsten matrix  copper infiltration  capsule-free HIP  cryogenic machining
Foundation item:国家重点研发计划项目(2017YFB0306000)、进口替代专项
Author NameAffiliation
Zhou Zenglin,He Xueliang,Li Yan,Hui Zhilin and Xie Yuanfeng  
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      The paper first teases out the pore design requirements of porous tungsten matrix materials (PTMM). Secondly, the preparation of PTMM as the main line is introduced, including the process of tungsten powder pretreatment and forming, tungsten compact sintering, copper infiltration and removal, porous tungsten HIP and cryogenic machining. Finally, the test methods of properties of PTMM are summarized. Tungsten powders plasma spheroidization, tungsten compact extrusion and injection moulding are the future for the dispenser cathodes matrix. Porous tungsten capsule-free HIP contributes to high-reliability and long-life of dispenser cathodes. Porous tungsten cryogenic machining, an advanced sustainable process, is capable of short process manufacturing for porous tungsten matrix of dispenser cathodes.