文献类型：期刊文献

英文题名：Effects of Anode Arc Root Fluctuation on Coating Quality During Plasma Spraying

作者：An, Lian-tong[1];Gao, Yang[2];Sun, Chengqi[1]

机构：[1]Guangdong Ocean Univ, Nav Coll, Zhanjiang 524025, Peoples R China;[2]Dalian Maritime Univ, Transportat & Logist Engn Coll, Dalian 116026, Peoples R China

年份：2011

卷号：20

期号：4

起止页码：775

外文期刊名：JOURNAL OF THERMAL SPRAY TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000290579300008)、、EI(收录号：20112614100495)、Scopus(收录号：2-s2.0-79959568695)、WOS

基金：This study was supported by the National Natural Science Foundation of China's general projects grant No. 50575028, and the Foundation of Young Teacher of Guangdong Ocean University. The authors are grateful for their respective supports.

语种：英文

外文关键词：anode arc root; decarbonization; plasma jet; plasma spraying; tungsten carbide; voltage fluctuation

外文摘要：To obtain a coating of high quality, a new type of plasma torch was designed and constructed to increase the stability of the plasma arc and reduce the air entrainment into the plasma jet. The torch, called bi-anode torch, generates an elongated arc with comparatively high arc voltage and low arc fluctuation. Spraying experiments were carried out to compare the quality of coatings deposited by a conventional torch and a bi-anode torch. Alumina coatings and tungsten carbide coatings were prepared to appraise the heating of the sprayed particles in the plasma jets and the entrainment of the surrounding air into the plasma jets, respectively. The results show that anode arc root fluctuation has only a small effect on the melting rate of alumina particles. On the other hand, reduced air entrainment into the plasma jet of the bi-anode torch will drastically reduce the decarbonization of tungsten carbide coatings.