Corrosion and degradation mechanism of Ag/Ti3AlC2 composites under dynamic electric arc discharge. (1st August 2019)

• Record Type: Journal Article
• Authors: Ding, Jianxiang; Tian, Wubian; Wang, Dandan; Zhang, Peigen; Chen, Jian; Zhang, Yamei; Sun, ZhengMing
• Is Part Of: Corrosion science. Volume 156(2019)
• Page Start: 147
• Page End: 160
• Publication Date: 2019-08-01
• Subjects: Ag-based contact materials -- MAX phases -- Electric arc corrosion -- Microstructure -- Oxidation; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2019.05.005
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: Ag/10 wt%Ti3 AlC2 composite exhibits excellent arc resistance and bright application prospects. Dynamic arc discharging was performed on Ag/10TAC surface to study its corrosion mechanism. Inhomogeneous electric arc corrosion generates three featured regions on contact surface. Ti3 AlC2 was found to degrade by a rapid "decomposition-oxidation" process. Evolutions of structure and function on the contact surface lead to the degradation of Ag/10TAC. Abstract: The Ag/10 wt%Ti3 AlC2 (Ag/10TAC) composite exhibits excellent arc resistance and potential application in various industries. To understand its corrosion mechanism, dynamic electric arc discharge was conducted on the Ag/10TAC surface. The Ag matrix was subjected to melting, vaporization, deposition, absorption, and diffusion, resulting in chemical reactions and various morphologies. The Ti3 AlC2 was degraded by a rapid "decomposition–oxidation." The degradation of the Ag/10TAC composite is attributed to the changes in structure and function on the contact surfaces. The present study facilitates the design, performance optimization, and failure analysis of Ag/Mn + 1 AXn (Ag/MAX) composites.