LIN Lan-fang1*, LIN Lubo2, DAI Pinqiang2,3
(1. College of Marine Engineering, Jimei University, Xiamen 361021, China 2. College of Materials Sciences and Engineering, Fuzhou University, Fuzhou 350108, China 3. Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350108, China)
Abstract: Nanocrystalline (nc) Ni-Co-Fe-P alloy coatings were synthesized by pulsed electrodeposition. The structure, surface morphology and composition of nc Ni-Co-Fe-P alloy coating were studied by XRD, TEM, SEM and EDS. The effects of alloying with phosphorus and subsequent heat treatment on the wear resistance of nc Ni-Co-Fe-P alloy were studied using a friction-wear tester. The results indicate that the grain size of nc Ni-40.41%Co-6.16%Fe-1.63%P alloy coating was only 8.3 nm, and the hardness and wear resistance of nc Ni-Co-Fe-P alloy were higher than that of nc Ni-Co-Fe alloy coating. The hardness and wear resistance of nc Ni-Co-Fe-P alloy were improved by heat treatment. There was a positive relationship between the wear resistance and hardness, and the wear mechanism changed gradually from abrasive and adhesion wear to abrasive wear with increasing hardness of nc Ni-Co-Fe-P alloy.
Key words: pulsed electrodeposition; nanocrystalline; Ni-Co-Fe-P coating; tribological properties
E-mail: llf66666@sina.com
Tribology, Vol. 31, Issue 4, 2011, 340~345
