期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 281, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2022.125832
关键词
Magnesium-lithium alloy; Cold spray; Wear resistance; Corrosion protection
资金
- National Natural Science Foundation of China [51975137, 52175163]
- Equipment PreResearch Field Foundation [80923010602]
- Foundation for Key Laboratory of Defense Science and Technology [61420050301]
- Fundamental Research Funds for the Central Universities [GK2100260330]
The research comprehensively analyzed aluminum bronze coatings, demonstrating their potential in improving the surface properties of magnesium-lithium alloys. The prepared aluminum bronze coatings were found to have higher hardness and wear resistance, as well as excellent corrosion resistance.
Aluminum bronze coatings were prepared on MBLS10A-200 magnesium-lithium alloy substrate by cold spraying technology to improve the surface properties of Mg-Li alloys. The microstructure, phase composition, microhardness, tribological properties and corrosion resistance of the coatings were systematically analyzed. The results show that aluminum bronze coatings are mainly composed of alpha phase. fl phase in the original aluminum bronze powder disappeared in the coating due to the eutectoid transition of fl ->alpha + 72 during the cold spraying. Compared with the Mg-Li alloy substrate, the aluminum bronze coating exhibits the higher microhardness (222.88 HV0.3) and wear resistance (friction coefficients, wear track widths and wear mass losses are 0.37, 0.79 mm and 2.47 mg, respectively). The dominant wear mechanism of the coatings was abrasive wear. In the electrochemical test, the corrosion current density of the aluminum bronze coating (3.07 x 10-5 A/cm2) was an order of magnitude lower than that of Mg-Li alloy substrate (6.15 x 10-4 A/cm2), indicating that the coating had superior corrosion resistance. The above analysis confirms that preparing a cold sprayed aluminum bronze coating has outstanding tribological and corrosion resistance properties.
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