Electrodeposition of Cu-Sn-Graphite-Al₂O₃ Composite Coatings and their Tribological Properties

Abstract:

In order to improve the wear resistance, ensure the self-lubricating property, Cu-Sn coatings were prepared on the basis of non-cyanide pyrophosphate-stannate and strengthened by combining sol-gel method and composite electroplating technology. In the paper, graphite Sol and Al₂O₃ Sol were added to the Cu-Sn electroplating solution to obtain nanoparticles enhanced Cu-Sn-graphite and Cu-Sn-graphite-Al₂O₃. The effect of graphite Sol and Al₂O₃ Sol addition on composite coatings was investigated, such as surface morphology, micro-hardness and tribological properties. The result shows that the incorporation of the graphite Sol and the Al₂O₃ Sol lead to change the structure of the composite coatings. When the additions of graphite Sol and Al₂O₃ Sol were 110mL/L and 40mL/L respectively, the graphite and Al₂O₃ particles are uniformly distributed in the Cu-Sn matrix and contribute greatly to improve the hardness and tribological properties of Cu-Sn alloy coating.

• Periodical: Materials Science Forum (Volume 893)
• Pages: 335-339
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.893.335
• Online since: March 2017
• Authors: Xiao Hui Wang, Li Xia Ying*, Chun Jie Zhang, Xiu Peng Lv
• Keywords: Cu-Sn-Graphite-Al₂O₃, Pulse Electrodeposition, Sol, Tribological Property

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