Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29757
Title: Laser cladding of copper with molybdenum for wear resistance enhancement in electrical contacts
Authors: Ng, KW
Man, HC 
Cheng, FT
Yue, TM 
Keywords: Cu electrical contact
Electrical contact resistance
Laser cladding
Molybdenum
Wear
Issue Date: 2007
Publisher: North-Holland
Source: Applied surface science, 2007, v. 253, no. 14, p. 6236-6241 How to cite?
Journal: Applied surface science 
Abstract: Laser cladding of Mo on Cu has been attempted with the aim of enhancing the wear resistance and hence increasing the service life of electrical contacts made of Cu. In order to overcome the difficulties arising from the large difference in thermal properties and the low mutual solubility between Cu and Mo, Ni was introduced as an intermediate layer between Mo and Cu. The Ni and Mo layers were laser clad one after the other to form a sandwich layer of Mo/Ni/Cu. Excellent bonding between the clad layer and the Cu substrate was ensured by strong metallurgical bonding. The hardness of the surface of the clad layer is seven times higher than that of the Cu substrate. Pin-on-disc wear tests consistently showed that the abrasive wear resistance of the clad layer was also improved by a factor of seven as compared with untreated Cu substrate. The specific electrical contact resistance of the clad surface was about 5.6 × 10-7 Ω cm2.
URI: http://hdl.handle.net/10397/29757
ISSN: 0169-4332
EISSN: 1873-5584
DOI: 10.1016/j.apsusc.2007.01.086
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