The Improvement of CrN Coatings Wear Resistance by Adjusting the Cycle Number of Electrochemical
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Published:2024-08-20
Issue:8
Volume:12
Page:295
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ISSN:2075-4442
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Container-title:Lubricants
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language:en
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Short-container-title:Lubricants
Author:
Wang Xin1, Wang Qianzhi1ORCID, Zhou Fei1ORCID, Kong Jizhou1, Zhou Zhifeng2ORCID
Affiliation:
1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 2. Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China
Abstract
To further improve the sealing effect of electrochemical polarization (EP) on the CrN coatings, the EP treatment at different cycle numbers was conducted. The microstructure, mechanical, and tribological properties of CrN coatings were investigated. Findings indicated an elevation in oxygen content from 6.32% to 12.35% with increasing cycle number from 10 to 60 times, yet the crystal structure of CrN (111) and CrN (200) persisted. The X-ray photoelectron spectrum (XPS) and transmission electron microscope (TEM) revealed that a minimal quantity of oxides was produced. This led to a decrease in the coatings porosity from 16.79% to 5.83%. For this reason, the hardness of CrN coatings increased with a maximum degree of 18.3%, whilst the wear rate decreased with a maximum degree of 37.5% at the cycle number of 20 times.
Funder
Postgraduate Research and Practice Innovation Program of Jiangsu Province
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