1. Microstructure and Corrosion Properties of Biodegradable Mg/MgO Composite Coating on Mg Alloy Prepared by High Velocity Suspension Flame Spraying.
- Author
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Yao, Hai-Long, Xia, Jing, Yi, Deng-Liang, Yang, Chao, Zhang, Meng-Xian, Bai, Xiao-Bo, Chen, Qing-Yu, Wang, Hong-Tao, and Li, Shi-Bin
- Subjects
COMPOSITE coating ,FLAME spraying ,MAGNESIUM alloys ,MAGNESIUM oxide ,METAL coating ,ALLOYS ,MICROSTRUCTURE - Abstract
A biodegradable Mg/MgO composite coating was deposited onto AZ31B magnesium alloy by high-velocity suspension flame spraying technique using nano-sized MgO and micron-sized Mg powders. Phase constitution, microstructure, mechanical property and corrosion behavior of Mg/MgO composite coatings with different Mg/MgO ratios were investigated. Mg/MgO composite coatings with different Mg/MgO ratios presented rough and porous surfaces with typical features of solid-fluid co-deposition and exhibited well bonding coating/substrate interfaces with some pores within the coatings. Mg/MgO composite coatings prepared by co-deposition of Mg/MgO mixed powder were mainly composed of Mg rather than MgO indicating superior deposition of Mg. Microhardness, elastic modulus and tensile strength of Mg/MgO composite coatings were influenced by the Mg/MgO ratio. Mg/MgO composite coatings presented a limited corrosion protection for Mg alloy substrate after immersion in Hanks' simulated body fluid for different times. Corrosion behavior of Mg/MgO composite coatings was also discussed. This study proposed a strategy to prepare biodegradable Mg/MgO composite coating on metal substrates for potential applications in the implant field. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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