Influence of breakdown voltages on arc erosion of a Ti3AlC2 cathode in an air atmosphere. Issue 13 (September 2017)

• Record Type: Journal Article
• Authors: Huang, Xiaochen; Feng, Yi; Qian, Gang; Zhang, Jingcheng; Zhang, Xuebin
• Is Part Of: Ceramics international. Volume 43:Issue 13(2017)
• Page Start: 10601
• Page End: 10605
• Publication Date: 2017-09
• Subjects: Ti3AlC2 -- Arc discharge -- High-speed camera -- Raman spectroscopy -- Oxidation -- Crystal transformation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.05.018
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The influence of breakdown voltage on arc erosion of Ti3 AlC2 has been investigated. After 3–10 kV arc erosion in air, the cathode surface appeared uneven with pits, cracks and ejected particles. The arc columns were recorded by a high speed camera. By increasing the breakdown voltage, the breakdown current and erosion area increase, meanwhile breakdown strength decreases. Experimental results demonstrated that after high-energy arc erosion in air, Ti3 AlC2 was oxidized to TiO2 and Al2 O3 . Remarkably, crystal transformation from anatase to TiO2 rutile occurred for breakdown voltage higher than 3 kV, the transformation process being completed for breakdown voltage 9 and 10 kV.