How to Improve the Sliding Electrical Contact and Tribological Performance of Contacts by Nickel Coating
Year: 2025
Type: article
Abstract: The electrical contact and tribological performance of contacts are critical for the reliable transmission of electric power and signals. In this study, a nickel layer was applied as an underlayer at the interface, and the effects of its thickness and plating process on the electrical and tribological properties were systematically investigated. Results showed that the coefficient of friction (COF) was reduced due to the nickel layer. The wear loss significantly decreased as the nickel layer thickness increased from 0.5 μm to 2 μm. This is primarily due to the nickel layer reducing adhesive wear. Additionally, the electrical contact resistance (ECR) increased as the top coating was worn out, owing to a reduction in the effective conductive area. Furthermore, ECR, COF, and wear rate were further reduced when the nickel layer was deposited using electroless plating compared with electroplating. In conclusion, the wear resistance of electrical contacts can be improved by a thicker nickel layer or electroless plating. This study provides a theoretical basis for understanding the role of the nickel layer in improving sliding electrical contact and wear behaviors.
Source: Coatings
Authors: Lu Ding, Yafeng Zhang, Wei Li, Yue Hu, Shaoxiong Cai, Jiaxin Yu
Institution: Southwest University of Science and Technology
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W4407176184