可降解医用Zn-3Al-1Mg合金的体外腐蚀行为和力学性能  

In vitro corrosion behavior and mechanical properties of biodegradable medical Zn-3Al-1Mg alloy

作　　者：刘晓倩 刘翠[1] 乔爱科 穆永亮[1,2] Liu Xiaoqian;Liu Cui;Qiao Aike;Mu Yongliang(School of Metallurgy,Northeastern University,Shenyang 110819,China;Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,China;School of Chemistry and Life Science,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]东北大学冶金学院,沈阳110819 [2]东北大学多金属共生矿生态化治金教育部重点实验室,沈阳110819 [3]北京工业大学化学与生命科学学院,北京100124

出　　处：《材料与冶金学报》2024年第2期181-189,196,共10页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目(12172018);北京市教委-市自然科学基金联合项目(KZ202110005004).

摘　　要：采用热挤压方法制备了管状Zn-3Al-1Mg合金,利用扫描电子显微镜(SEM)及拉伸、压缩测试等方法研究了铸态和挤压态管状Zn-3Al-1Mg合金的微观组织与力学性能同时,利用浸泡试验、电化学测试、X射线光电子能谱分析(XPS)研究了挤压态管状Zn-3Al-1Mg合金在模拟体液(SBF)溶液中的腐蚀行为结果表明:铸态及挤压态合金均由η-Zn,α-Al及Mg2Zn11三相组成,挤压态合金的微观组织明显细化,且力学性能明显优于铸态合金的力学性能挤压态合金在模拟体液中的腐蚀速率为015~028 mm/a腐蚀形貌分析结果揭示了不同物相间的微电偶腐蚀机制,腐蚀产物包括Zn/Al/Mg的氧化物、氢氧化物,以及Ca,P和Zn/Al/Mg相结合产生的磷酸盐、碳酸盐结合电化学测试结果,对挤压态合金的腐蚀过程和腐蚀机理进行了分析.The tubular Zn-3Al-1Mg alloy was prepared by hot extrusionThe microstructure and mechanical properties of as-cast and extruded tubular Zn-3Al-1Mg alloy were studiedThe corrosion behavior of extruded tubular Zn-3Al Mg alloy in simulated body fluid(SBF)was studied by immersion test,electrochemical test,and X-ray photoelectron spectroscopy(XPS)The results showed that both as-cast and extruded alloys were composed of three phases:η-Zn,α-Al,and Mg2Zn11The microstructure of extruded alloy was significantly refined,and the mechanical properties were much better than that of as-cast alloyThe corrosion rate of extruded alloy in simulated body fluid was 015~028 mm/aThe analysis of corrosion morphology revealed the mechanism of microgalvanic corrosion between different phasesThe corrosion products included Zn/Al/Mg oxides,hydroxides,as well as phosphates and carbonates produced by the combination of Ca,P and Zn/Al/MgFinally,the corrosion process and mechanism of the extruded alloy were discussed based on the electrochemical test results.

关 键 词：ZN合金 生物材料 力学性能 模拟体液 降解行为 

分 类 号：TG146[一般工业技术—材料科学与工程]