Open AccessMicrostructure and Wear Resistance of Ni-Al2O3 Nano-composite Coating
Author(s) -
Guang Qu,
Dongsheng Wang,
Qunyou Wang,
Mengzhang Hua
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1965/1/012113
Subject(s) - materials science , indentation hardness , microstructure , coating , composite number , abrasive , composite material , wear resistance , metallurgy
Ni-Al 2 O 3 nano-composite coating was prepared on the ASP30 powder metallurgical steel surface for semiconductor encapsulation mould by using electrodeposition method. Effects of Al 2 O 3 contents on microstructure, microhardness and wear resistance of composite coating were analyzed. Results demonstrate that due to refined crystalline strengthening, dispersion strengthening and high-density dislocation strengthening of Al 2 O 3 nanoparticles in uniform distribution, Ni-Al 2 O 3 nano-composite coating has more compact structure and smaller grain size compared to the pure Ni coating, which are conducive to increase microhardness and wear resistance of the coating significantly. Neither too low nor too high Al 2 O 3 contents is beneficial to improve microhardness and wear resistance of composite coating. The pure Ni coating has serious adhesion wearing, while the nano-composite coating with the moderate Al 2 O 3 content has the best performance and it mainly has mild abrasive wear, accompanied with some adhesion wearing. Relatively serious adhesion wearing occurs on the wear surface of pure Ni coating. Differently, wearing surface of Ni-Al 2 O 3 nano-composite coating is mainly dominated by mild abrasive wear, accompanied with some adhesion wearing. Neither too low and too high Al 2 O 3 content is conducive to improve microhardness and wear resistance of composite coating.