The Role of the Transfer Layer on the Sliding Wear Behaviour of a Cu-15Ni-8Sn Alloy Under Different Loads

作者：Li, Daoxi; Wang, Zhi; Zhao, Chao; Luo, Zongqiang; Zhang, Weiwen^*

来源：Tribology Letters, 2022, 70(1): 9.

DOI：10.1007/s11249-021-01550-7

• Cu-15Ni-8Sn alloy
• Dry sliding wear
• Transfer layer
• Oxide layer

We studied the microstructure of the transfer layer and its effect on the wear mechanism and wear properties of an aged Cu-15Ni-8Sn alloy against 100Cr6 bearing steel during dry sliding by changing the applied load. The results indicate that the aged Cu-15Ni-8Sn alloy shows different wear behaviour and wear properties when the applied load changes; specifically, the average friction coefficient and specific wear rate decrease quickly with increasing applied load under steady wear conditions. The sample tested under a relatively high applied load showed the best wear performance because the oxide layer in the transfer layer. The main wear mechanisms were found to change with variation in the applied load. Metallic nanocrystalline particles and relatively ductile copper oxides promoted the formation of a thick and dense oxide layer. Changes in the thickness and morphology of the oxide layer under different loads can significantly affect the wear mechanisms.