Preparation of nanocomposite thoriated tungsten cathode by swaging technique
来源期刊：中国有色金属学报(英文版)2002年第2期
论文作者：王发展 诸葛飞 张晖 丁秉钧
文章页码：242 - 245
Key words：W-ThO2 cathode; nanosized powders; nanocomposite; swaging
Abstract: By using the high energy ball milling method, the nanosized ThO2 powders were obtained. Through mixing powders, sintering and hot swaging processing, a nanocomposite thoriated tungsten cathode was fabricated. The relative density of the nanocomposite material is near 100%. The microstructure of nanocomposite cathode is quite different from that of conventional thoriated tungsten cathode. Most of thoria particles are less than 100nm in diameter, and distribute on t he boundaries of tungsten grains. The nanocomposite cathode shows a much lower arc starting field than that of conventional cathode, which will improve the performance of the cathode significantly.
