肖波,揭晓华,肖厚群.放电镀膜时等离子体通道内粒子状态的计算机模拟[J].表面技术,2013,42(6):6-9,22.
XIAO Bo,JIE Xiao-hua,XIAO Hou-qun.Computer Simulation of Charge Particle State in Plasma Discharge Channel with Electrical Discharge Coating[J].Surface Technology,2013,42(6):6-9,22
放电镀膜时等离子体通道内粒子状态的计算机模拟
Computer Simulation of Charge Particle State in Plasma Discharge Channel with Electrical Discharge Coating
投稿时间:2013-06-19  修订日期:2013-06-27
DOI:
中文关键词:  液相脉冲放电  粒子模拟  放电通道  等离子体
英文关键词:EDC in liquid  particle-in-cell  discharge channel  plasma
基金项目:国家自然科学基金资助项目(51075075) ;高等学校博士学科点专项科研基金资助项目(20104420110006)
作者单位
肖波 广东工业大学 材料与能源学院, 广州 510006 
揭晓华 广东工业大学 材料与能源学院, 广州 510006 
肖厚群 广东工业大学 材料与能源学院, 广州 510006 
AuthorInstitution
XIAO Bo Faculty of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China 
JIE Xiao-hua Faculty of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China 
XIAO Hou-qun Faculty of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China 
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中文摘要:
      目的 分析液相脉冲放电微观机理,解释放电过程中放电通道对电极的影响。 方法 以 45 钢表面液相脉冲放电沉积 TiC 陶瓷涂层放电沉积瞬间极板间形成的单脉冲等离子体为研究对象,用粒子模拟的方法描述了放电通道中电子、钛离子的运动及分布状态。 结果 放电通道中电子的运动较为活跃,在放电形成的开始阶段,电子由工件电极负极激发,迅速向工具电极移动,期间通过与液相介质中的中性粒子碰撞,迅速往工具电极积累,运动过程中遵循等离子体的集体运动特性,过程贯穿于整个等离子体的形成过程;在相同的时间步长内,放电通道中 Ti 离子的运动比电子要缓慢得多,在脉冲放电期间需要较多的时间才能迁移到极板。 结论 放电镀膜时,所用极间距应大于电火花成形加工时的极间距。
英文摘要:
      Objective To explore the mechanism of EDC, and the influence between discharge channel and electrode during discharge process. Methods The research object of this paper is single pulse plasma discharge channel, which formed in liquid when manufacture TiC ceramic coating on 45 steel by electrical discharge coating technology. The particle-in-cell simulation method is utilized to describe the movement and distribution of titanium ions and electrons. Results Electronic movement was active in discharge channel, the electrons were aroused in negative electrode and rapidly move to the tool electrode, and the complicated interaction with other particles led to electrons quickly accumulate in tool electrode. Above-mentioned movement followed the collective motion features of plasma during the whole plasma formation process. At the same time step, the motion of titanium ion was much slower than electronic in plasma channel, and it took more time to move to the plate during the pulse discharge period. Conclusion It requires wider electrode distance when the electrical discharge coating is adopted compared with sinker EDM.
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