Cathode Erosion of Graphite and Cu/C Materials in Airarcs

作     者：Zhang Chengyu Qiao Shengru Liu Yiwen Yang Zhimao Wang Yaping Yong Guo 张程煜;Qiao Shengru;Liu Yiwen;Yang Zhimao;Wang Yaping;Yong Guo

作者机构：Science and Technology on Thermostructural Composite Materials LaboratoryNorthwestern Polytechnical UniversityXi’an710072China School of ScienceXi’an Jiaotong UniversityXi’an710049China Department of ChemistryDatong UniversityDatong037000China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2012年第27卷第1期

页      面：18-20页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the National Natural Science Foundation of China (Nos. 50702045, 50871078, 51172182) the Program for New Century Excellent Talents in University (No. NCET-08-0460) Basic Research Foundation of NWPU (No. JC20100227) 

主　　题：Cu/C composite graphite air arc cathode erosion 

摘      要：Cathode erosion of graphite and Cu/C was studied in direct current arcs, which were ignited between two electrodes comprised of two kinds of carbon materials and a tungsten anode in air. The arced zones on the cathode surface were investigated by a scanning electron microscope. Also, the cathode erosion rates of the investigated materials were measured. The results show that two distinct zone can be seen on both cathodes. The eroded area was located at the zone just opposite to the anode and surrounded by a white zone. The arced surface on the Cu/C containing 9.3 % Cu is rougher than that of the pure graphite. Many particles with various sizes distributed on the Cu/C. The vaporization of Cu can lower the surface temperature and reduce the cathode erosion. Therefore, the cathode erosion rate of the Cu/C is lower than that of the pure graphite.