Open AccessAnalyzing the contact resistance for the penetration brazing of Cu/Ni metal wires
Author(s) -
Yawei Gao,
X. F. Liu,
Zhiguo Feng,
Pengfei Tian
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/770/1/012006
Subject(s) - graphite , materials science , brazing , contact resistance , welding , wetting , composite material , electrical contacts , copper , electrode , penetration (warfare) , metallurgy , metal , chemistry , alloy , layer (electronics) , operations research , engineering
The electrical contact resistance behavior of the interface between the copper electrode and the graphite welding pool plays an important role in penetration brazing of Cu/Ni metal wires. Based on the fractal contact resistance model, the contact resistance between the copper electrode and the graphite welding pool is established by taking the oxide ablation of the graphite surface into account. The influences of the graphite ablation on the contact resistance for different pressure and different graphite materials are experimentally investigated. The ablation phenomenon on the surface of the graphite welding pool is observed during the welding process. It is found that the contact resistance slowly increases as the ablation degree of the graphite welding pool surface increases. The present work shows that the impact of the common graphite ablation on the interface contact resistance is more obvious than that of fine graphite.