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納米復(fù)合W-6%ThO_2和W-2%ThO_2陰極材料的性能對(duì)比
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國家自然科學(xué)基金資助項(xiàng)目(50071043)


Comparison of Nano-composite W-6%ThO_2 and W-2%ThO_2 Cathode
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    摘要:

    通過真空熱壓燒結(jié)制備了W-6%ThO2和W-2%ThO2納米復(fù)合陰極材料,分析表明兩者的顯微組織類似,納米ThO2較均勻分布在W基體上;前者的起弧電場強(qiáng)度低于后者,逸出功也相應(yīng)降低;兩者的機(jī)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.

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諸葛飛,王發(fā)展,張暉,丁秉鈞.納米復(fù)合W-6%ThO_2和W-2%ThO_2陰極材料的性能對(duì)比[J].稀有金屬材料與工程,2003,(2).[Zhuge Fei, Wang Fazhan, Zhang Hui, Ding Bingjun. Comparison of Nano-composite W-6%ThO_2 and W-2%ThO_2 Cathode[J]. Rare Metal Materials and Engineering,2003,(2).]
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