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纳米复合W-6%ThO2和W-2%ThO2阴极材料的性能对比

Comparison of Nano-composite W-6%ThO2 and W-2%ThO2 Cathode

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【作者】 诸葛飞王发展张晖丁秉钧

【Author】 Zhuge Fei1, Wang Fazhan2, Zhang Hui2, Ding Bingjun2(1.Zhejiang University, Hangzhou 310027, China)(2.Xi’an Jiaotong University, Xi’an 710049, China)

【机构】 浙江大学西安交通大学西安交通大学 浙江杭州310027陕西西安710049陕西西安710049

【摘要】 通过真空热压烧结制备了W-6%ThO2和W-2%ThO2纳米复合阴极材料,分析表明两者的显微组织类似,纳米ThO2较均匀分布在W基体上;前者的起弧电场强度低于后者,逸出功也相应降低;两者的机械性能相差不大。

【Abstract】 A novel tungsten cathode material with six percents of nanoscale ThO2 used in arc plasma has been fabricated by Hot Pressing(HP) sintering. A comparative study with the cathode of two percent nano ThO2 has been made on microstructure, starting characteristics and mechanical behavior. The results show that the microstructure, consisting of tungsten matrix with homogeneous dopants of ThO2 less than 200nm, is the same as the W 2%ThO2 cathode. The arc starting field for this cathode is lower than that of the reference cathode. Its work function is also correspondingly reduced. The differences between their mechanical behavior are not much.

【关键词】 W-6%ThO2阴极材料纳米复合
【Key words】 W ThO2 cathodenano composite
【基金】 国家自然科学基金资助项目(50071043)
  • 【文献出处】 稀有金属材料与工程 ,Rare Metal Materials and Engineering , 编辑部邮箱 ,2003年02期
  • 【分类号】TB33
  • 【被引频次】6
  • 【下载频次】100
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