Tsinghua University Press
Beijing
Tsinghua University Press, co-published with Springer
40145
10.1007/40145.2227-8508
2226-4108
2227-8508
35019314
Journal of Advanced Ceramics
J Adv Ceram
Materials Science
Ceramics, Glass, Composites, Natural Materials
Characterization and Evaluation of Materials
Nanotechnology
Structural Materials
Chemistry and Materials Science
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10.1007/s40145-018-0296-y
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Preparation and arc erosion properties of Ag/Ti2SnC composites under electric arc discharging
Research Article
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Jianxiang
Ding
Wubian
Tian
wbtian@seu.edu.cn
Peigen
Zhang
Min
Zhang
Jian
Chen
Yamei
Zhang
Zhengming
Sun
zmsun@seu.edu.cn
0000 0004 1761 0489
grid.263826.b
Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering
Southeast University
Nanjing
211189
China
0000 0004 1761 0489
grid.263826.b
Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering
Southeast University
Nanjing
211189
China
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 phase
metal-ceramic composite
arc erosion properties
microstructures
oxidation