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Research Article | Open Access

Preparation and arc erosion properties of Ag/Ti2SnC composites under electric arc discharging

Jianxiang DINGa, Wubian TIANa( ), Peigen ZHANGa, Min ZHANGa, Jian CHENa, Yamei ZHANGb, Zhengming SUNa,b( )
Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
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Abstract

New Ag/Ti2SnC (Ag/TSC) composites with uniform microstructure were prepared by powder metallurgy. The superior wettability between Ag and Ti2SnC was confirmed with a contact angle of 14°. Arc erosion properties of Ag/10wt%Ti2SnC (Ag/10TSC) and Ag/20wt%Ti2SnC (Ag/ 20TSC) contacts were investigated under 400 V/100 A/AC-3 and compared with Ag/CdO contact. The Ag/10TSC contact exhibited comparable arc erosion property to Ag/CdO contact. The fine arc erosion resistance was attributed to the good wettability between Ti2SnC and Ag, the good heat-conducting property of Ag/10TSC, and the slight decomposition of Ti2SnC that absorbed part of electric arc energy. The excessive Ti2SnC significantly decreased the thermal conducting property of the Ag/20TSC composite, resulting in the severe heat accumulation that decomposed Ti2SnC and deteriorated arc erosion property. The oxidation behavior of Ti2SnC under high electric arc temperature was also studied and then an arc erosion mechanism was proposed to get a comprehensive understanding on the arc erosion property of Ag/TSC composites.

Keywords

MAX phasemetal-ceramic compositearc erosion propertiesmicrostructuresoxidation

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Journal of Advanced Ceramics
Volume 8 Issue 1,
March 2019
Pages 90-101
DOI: 10.1007/s40145-018-0296-y
Cite this article:
DING J, TIAN W, ZHANG P, et al. Preparation and arc erosion properties of Ag/Ti2SnC composites under electric arc discharging. Journal of Advanced Ceramics, 2019, 8(1): 90-101. https://doi.org/10.1007/s40145-018-0296-y

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Received: 21 June 2018
Revised: 17 August 2018
Accepted: 02 September 2018
Published: 13 March 2019
© The author(s) 2019

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