期刊
WEAR
卷 488, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.wear.2021.204167
关键词
CrBN coating; Incorporation; Hardness; Plastic deformation; Tribology
资金
- National Natural Science Foundation of China [51705245]
- National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics [HTL-A-20G06]
The co-incorporation of Ni and Cu at specific ratios (11.01% and 3.41% respectively) has been shown to significantly improve the hardness and wear resistance of CrBN coatings, with CuO acting as a lubricating layer. However, excessive Cu content can lead to a sharp decline in hardness and weaken the wear resistance of the coatings. Therefore, Ni (11.01%) and Cu (3.41%) is the proper co-incorporation combination for enhancing the mechanical and tribological properties of the coatings.
Based on the advantages of Ni or Cu incorporation to the mechanical and tribological properties of nitride coatings, the co-incorporation of Ni and Cu at different ratios was employed on CrBN coatings. Results showed that Ni (11.01 at%) and Cu (3.41 at%) co-incorporation increased hardness from 24.4 GPa to 26.4 GPa. As a consequence, coatings wear rate decreased from 6.4 x 10(-7) mm(3)/Nm to 5.4 x 10(-7) mm(3)/Nm. At the meantime, friction coefficient declined from 0.30 to 0.28 due to CuO lubricating layer. However, when Cu content was high (10.68 or 15.05 at.%), the hardness of Ni-Cu-CrBN coatings sharply declined, which weakened wear resistance and increased friction coefficient. It indicated that Ni (11.01 at%) and Cu (3.41 at%) was the proper co incorporation combination.
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