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乔雪岩,余琨,陈良建,戴翌龙,肖涛,邓幼文,帅词俊,颜阳.热挤压和时效处理对生物可降解Mg-Zn-Y合金性能的影响[J].稀有金属材料与工程(英文),2018,47(3):773~779.[Qiao Xueyan,Yu Kun,Chen Liangjian,Dai Yilong,Xiao Tao,Deng Youwen,Shuai Cijun,Yan Yang.The influence of hot extrusion and age treatment on the properties of biodegradable Mg-Zn-Y alloy[J].Rare Metal Materials and Engineering,2018,47(3):773~779.]
The influence of hot extrusion and age treatment on the properties of biodegradable Mg-Zn-Y alloy
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Received:March 24, 2016  Revised:April 25, 2016
DOI:
Key words: Magnesium  biomaterial  extrusion  aging  corrosion properties  mechanical properties
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliationE-mail
Qiao Xueyan 中南大学材料科学与工程学院 qxy_langya@163.com 
Yu Kun 中南大学材料科学与工程学院 yukunarticle@163.com 
Chen Liangjian 中南大学湘雅三医院  
Dai Yilong 中南大学材料科学与工程学院  
Xiao Tao 中南大学湘雅二医院  
Deng Youwen 中南大学湘雅二医院  
Shuai Cijun 中南大学机电工程学院  
Yan Yang 中南大学材料科学与工程学院  
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Abstract:
      Mg-6Zn-1Y (mass fraction, %) alloys were prepared for degradable biomaterials. The billets of the alloy were produced by powder metallurgy (PM) method and then hot extruded. The extruded samples were aged for 24h and 72h at 150°C respectively. The microstructure and corrosion behavior of the experimental alloys were comprehensively investigated. The microstructure observations show that the alloys contain α-Mg, MgZn, MgZn2 and Mg3YZn6 (I-phase) phases. The hot extrusion process significantly refined the grains and led to better mechanical properties with the value of compressive strength in the range of 365~399MPa, and better corrosion resistance for the PM alloy shows higher hydrogen volume in the immersion test. Furthermore, due to more uniform corrosion behavior, the alloy aged for 72h shows lower corrosion rate and corrosion current density in the immersion test and potentiodynamic polarization test respectively, and higher resistance value (Rp) results from the electrochemical impedance spectroscopy (EIS), which means the alloy aged for 72h exhibits better corrosion resistance than the other three alloys.