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医用可降解镁合金腐蚀疲劳行为研究进展
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作者单位:

1.华北理工大学;2.北京科技大学

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中图分类号:

TG146.2+2;TG178

基金项目:

国家重点研发计划(2016YFB0700303);河北省自然科学基金(E2020209153);河北省省属高校基本科研业务费(JYG2019001,JQN2019010);新金属材料国家重点实验室开放基金(2020-Z12);唐山市科技计划项目(20130205b)


Research Progress on Corrosion Fatigue Behavior of Novel Biomedical Degradable Magnesium-Based Alloys
Author:
Affiliation:

1.North China University of Science and Technology;2.University of Science and Technology Beijing

Fund Project:

Supported by The National Key Research and Development Program of China (2016YFB0700303); Natural science foundation of Hebei province (E20209153); Fundamental Research Funds for the Provincial Universities of Hebei (JYG2019001, JQN2019010); State Key Lab of Advanced Metals and Materials (2020-Z12); Science and Technology Project of Tangshan (20130205b)

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    摘要:

    镁合金由于良好的生物安全性和力学承载性,同时兼具可控的体内外降解速率,被誉为新一代的“革命性医用金属材料”。然而,在湿润气氛条件下镁合金的耐蚀性能较差,尤其是在复杂载荷和腐蚀疲劳作用下(经历动态交变载荷及腐蚀介质协同作用)使得镁合金的力学固定/支撑功能急剧骤减,并导致植入提前失败。因此,本文从医用镁合金疲劳失效的施加载荷、频率与腐蚀因素的耦合机理出发,针对医用镁合金体内外腐蚀疲劳寿命、断口微区特征和腐蚀速率间定量关系,阐述交变载荷下腐蚀疲劳失效微观机制。同时,本文深入解析了疲劳微裂纹萌生/扩展机理,全面总结了提升镁合金腐蚀疲劳性能的举措,以及展望了生物医用可降解镁合金的应用前景和发展方向。

    Abstract:

    Magnesium-based alloys were known as the new generation ‘revolutionary medical metal materials’, due to its better biological safety, excellent mechanical bearing effect and controllable degradation rate in vivo and in vitro. However, the corrosion resistance of magnesium alloy is very poor under the humid atmosphere. Particularly in a complicated human physiological environment, implant materials need to undergo the synergistic effects of dynamic alternating load and corrosive medium. Thus, it can cause the mechanical fixation and mechanical support roles of the Mg-based alloys decreased dramatically, resulting in the premature implantation failure. As a result, the coupling mechanism of applied load, frequency and corrosion factors affecting fatigue failure of medical magnesium alloys was investigated. In view of the quantitative relationships between corrosion fatigue life, fracture micro-zone characteristics and corrosion rate of biomedical Mg alloys in vivo and in vitro, the microscopic mechanism of corrosion fatigue failure under cyclic loading was described. Meantime, the initiation and propagation mechanism of fatigue micro-cracks were thoroughly analyzed; the improvement methods of corrosion fatigue properties of Mg alloys were comprehensively summarized; and the application prospect and development direction of biodegradable magnesium alloys for biomedical use were forecasted.

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陈连生,郑亚琪,李静媛,张源,刘芸,田亚强,郑小平.医用可降解镁合金腐蚀疲劳行为研究进展[J].稀有金属材料与工程,2021,50(9):3375~3387.[Liansheng Chen, Yaqi Zheng, Jingyuan Li, Yuan Zhang, Yun Liu, Yaqiang Tian, Xiaoping Zheng. Research Progress on Corrosion Fatigue Behavior of Novel Biomedical Degradable Magnesium-Based Alloys[J]. Rare Metal Materials and Engineering,2021,50(9):3375~3387.]
DOI:10.12442/j. issn.1002-185X.20200716

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  • 收稿日期:2020-09-16
  • 最后修改日期:2020-10-27
  • 录用日期:2020-11-25
  • 在线发布日期: 2021-09-27
  • 出版日期: 2021-09-24