期刊
COATINGS
卷 11, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/coatings11080915
关键词
micro-arc oxidation; composite ceramic coating; wear property; tribological behavior
资金
- Scientific Research Fund of Hunan Provincial Education Department [20K112]
- Research Fund of the Education Department of Hunan Province, China [18B421]
- National Key Research and Development Program of China [2016YFB0300900]
- Opening Foundation Key Laboratory of Hunan Province for Efficient Power System and Intelligent Manufacturing [19KF01]
Al2O3-MoO2-SiO2 composite ceramic coatings are formed on Al-Zn-Mg-Cu alloy parts using the DC micro-arc oxidation (MAO) method in silicate electrolyte with sodium molybdate, leading to improved wear resistance. The structure characteristics and wear resistance of the composite coatings are influenced by the concentration of sodium molybdate, with the best performance observed at 3 g/L concentration.
In order to enhance wear properties of Al-Zn-Mg-Cu alloy parts, Al2O3-MoO2-SiO2 composite ceramic coatings are formed on Al-Zn-Mg-Cu alloy by the DC micro-arc oxidation (MAO) method in the silicate electrolyte with sodium molybdate. Effects of sodium molybdate concentration on the structure characteristics and wear resistance of the composite ceramic coatings are analyzed by scanning electron microscopy, X-ray diffraction and the wear test, respectively. Analyses indicate that the composite coating consists of different states of Al2O3, MoO2 and mullite phase. With the addition of molybdate in the electrolyte, the morphology and structure are changed. The tribological behavior is greatly affected by the surface characteristics and hardness of the coatings. The composite coatings formed by adding 3 g/L of sodium molybdate electrolyte have the best wear resistance.
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