首页|Corrosion Behavior of Graphene Nanosheets Reinforced Magnesium Matrix Composites in Simulated Body Fluids

Corrosion Behavior of Graphene Nanosheets Reinforced Magnesium Matrix Composites in Simulated Body Fluids

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Magnesium(Mg)alloy is considered as a promising biodegradable implant material but restricted to rapid degradation.Here,the new strategies based on thixomolding process had been explored to utilize the outstanding anti-permeability of graphene nanosheets(GNPs)while inhibit its galvanic corrosion with the matrix,so as to improve the corrosion resistance of com-posites.The agglomerate of GNPs with 0.9 wt％content is the main reason for the deterioration of corrosion performance due to the formation of micro-galvanic corrosion.The grain refinement of composites with 0.6 wt％content had positive effects on the better corrosion resistance.After process adjusting,the unique distributions of GNPs along grain boundaries play a vital role in improving the corrosion resistance.It can be ascribed to the following mechanisms:(Ⅰ)The barriers can be established between the Mg matrix and corrosive medium,hence blocking the charge transfer at the interface;(Ⅱ)The GNPs can effectively promote apatite deposition on the Mg matrix,leading to form dense apatite layers and prevent the further invasion of SBF;(Ⅲ)The GNPs acting as reinforcements exists in the corrosion layer and apatite layer,impede the apatite layer falling off from the Mg matrix.These findings broaden the horizon for biomedical applications in Mg matrix composites to realize desired performances.

Magnesium matrix compositeGraphene nanosheetsCorrosion resistance

Liwen Chen、Jianhui Jing、Lulu Zhang、Jing Li、Weipeng Chen、Limin Li、Yuan Zhao、Hua Hou、Yuhong Zhao

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School of Materials Science and Engineering,Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-Performance Al/Mg Alloy Materials,North University of China,Taiyuan 030051,China

Shanxi Key Laboratory of Advanced Manufacturing Technology,School of Mechanical Engineering,North University of China,Taiyuan 030051,China

School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China

Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing 100083,China

Institute of Materials Intelligent Technology,Liaoning Academy of Materials,Shenyang 110004,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Defense Basic Scientific Research Program of ChinaNational Defense Basic Scientific Research Program of ChinaKey Research and Development Program of Shanxi ProvincePatent Conversion Special Project of Shanxi ProvinceBasic Research Program of Shanxi Province

22008224520742465227539052375394JCKY2020408B002WDZC2022-12202102050201011202303002202203021222041

2024

10.1007/s40195-024-01680-6

金属学报(英文版)
中国金属学会

金属学报(英文版)

CSTPCD
影响因子：0.77
ISSN：1006-7191
年,卷(期)：2024.37(3)
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