Endurance-test and theoretical prediction of a rare earth nanocathode for the applied field magnetoplasmadynamic thruster  

作　　者：王戈 李永 周成 魏延明 孔春才 郑学程 张心霨 杨志懋 郑金星 丛云天 王宝军 Ge WANG;Yong LI;Cheng ZHOU;Yanming WEI;Chuncai KONG;Xuecheng ZHENG;Xinwei ZHANG;Zhimao YANG;Jinxing ZHENG;Yuntian CONG;Baojun WANG(Beijing Institute of Control Engineering,Beijing 100080,People's Republic of China;Ministry of Education Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter,Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics,School of Physics,Xi'an Jiaotong University,Xi'an 710049,People's Republic of China;Institute of Plasma Physics,Hefei Institute of Physical Sciences,Chinese Academy of Sciences,Hefei 230031,People's Republic of China)

机构地区：[1]Beijing Institute of Control Engineering,Beijing 100080,People's Republic of China [2]Ministry of Education Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter,Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics,School of Physics,Xi'an Jiaotong University,Xi'an 710049,People's Republic of China [3]Institute of Plasma Physics,Hefei Institute of Physical Sciences,Chinese Academy of Sciences,Hefei 230031,People's Republic of China

出　　处：《Plasma Science and Technology》2023年第10期49-59,共11页等离子体科学和技术（英文版）

摘　　要：The erosion loss of cathode is essential for the lifetime of magnetoplasmadynamic thruster(MPDT).In this work,an endurance test system for MPDT cathodes was designed and developed,and the erosion characteristics,erosion rate and erosion mechanism of the cathode were studied using the system under vacuum condition.The WCe20 hollow cathode was selected to carry out the long-term erosion of 540 h with the argon propellant supply flow rate of40 ml min^(-1),the input current of 25 A,and the central magnetic field intensity of 96 Gs.In order to predict the theoretical service life of cathode,a steady state erosion numerical model was established.The calculation results show that the total erosion rate of sputtering and evaporation is 11.58 mg h^(-1),which is slightly smaller than the test data of the average cathode corrosion rate of 12.70 mg h^(-1) in the experiment,because the experimental value includes start-up erosion rate.

关 键 词：magnetoplasma dynamic thruster nano-oxide cathode ablation models 

分 类 号：TG1[金属学及工艺—金属学]