Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8044734 | Vacuum | 2018 | 27 Pages |
Abstract
In this work, we studied the microstructure formation and mechanical properties of the Ti alloyed C17200 Cu surface produced by plasma nitriding at 750 °C. The results firstly show that the multiphase coating consists of amorphous and nano-crystalline phases, and various types of Cu-Ti intermetallics, including CuTi2, CuTi, Cu3Ti2, Be3Ti2Cu, Cu2Ti, Cu3Ti, formed after the plasma nitriding at 750 °C. The formation of the specific type of Cu-Ti intermetallic depends on the processing duration, where a longer duration contributes to the formation of intermetallics with a higher Cu/Ti ratio. The evolution of the phase compositions is responsible for the change in the mechanical properties. The surface hardness of the modified C17200 Cu alloy improves to be 400 HV0.01 to a depth of 15 μm after plasma nitriding for 6 h, which contributes to a higher surface tribological resistance with a friction coefficient of 0.3 and a wear rate of 4.15 Ã 10â9 g/(r·N) for the modified suface.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Y.D. Zhu, J.W. Yao, M.F. Yan, Y.X. Zhang, Y.X. Wang, Y. Yang, L. Yang,