有色金属材料与工程2024，Vol.45Issue(3)：38-45,8.DOI:10.13258/j.cnki.nmme.20230504001
可降解Zn-Li合金吻合钉的自然时效与降解机制研究
Research on natural aging and degradation mechanism of degradable Zn-Li alloy staple
摘要
Abstract
As biodegradable metals with good mechanical properties and moderate degradation rate,Zn-based alloys have broad application prospects.The effect of natural aging on the properties of Zn-Li alloy and the in vitro degradation mechanism of Zn-Li alloy staple were studied.The effect of aging time on the mechanical properties and corrosion resistance of Zn-Li alloy wire were analyzed by tensile test and electrochemical test.Immersion test was used to analyze the effect of different simulation solutions on the degradation rate of Zn-Li alloy staple based on the weight change of the staple,and the degradation modes of different parts in Zn-Li alloy staple was analyzed by scanning electron microscope.The results show that the ultimate tensile strength of the wire aged for 2.0 a is 43.86 MPa lower than that of the wire aged for 1.0 a.The elongation decreases by 24.17%,the corrosion potential decreases from-1.07 V to-1.12 V,and the corrosion current density increases by 13%.The degradation rate of Zn-Li alloy staple is the highest in simulated body fluid,and the micro-galvanic corrosion of staple foot is the most serious corrosion type.关键词
生物医用材料/吻合钉/自然时效/体外降解/生物可降解金属Key words
biomedical materials/surgical staple/natural aging/in vitro degradation/biodegradable metals分类
矿业与冶金引用本文复制引用
董旭,耿芳,马凤仓,李伟,张柯..可降解Zn-Li合金吻合钉的自然时效与降解机制研究[J].有色金属材料与工程,2024,45(3):38-45,8.基金项目
国家自然科学基金资助项目(51771119) （51771119）
上海市自然科学基金资助项目(17ZR1419600) （17ZR1419600）
