杨敏,刘德宝.生物医用Mg-3Zn-0.2Ca合金显微组织与性能研究[J].稀有金属材料与工程,2018,47(1):93~98.[Min Yang,Debao Liu.Study on the microstructure and properties of Mg-3Zn-0.2Ca alloy for biomedical application[J].Rare Metal Materials and Engineering,2018,47(1):93~98.]
生物医用Mg-3Zn-0.2Ca合金显微组织与性能研究
投稿时间:2016-01-25  修订日期:2016-12-06
中文关键词:  Mg-Zn-Ca合金,显微组织,力学性能。
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      生物医用Mg-3Zn-0.2Ca合金的显微组织,力学性能,腐蚀行为通过光学显微镜,扫描电镜,力学测试以及模拟体液浸泡手段进行了研究。X射线衍射结果表明该合金的主要第二相为Mg7Zn3, Mg2Zn3, 和Mg4Zn7的金属间化合物相。经过56:1挤压比后的挤压态Mg-3Zn-0.2Ca合金的晶粒尺寸平均为2.5um,相比铸态的119.1um下降了47.6倍。屈服强度,抗拉强度以及延伸率分别为205MPa, 336MPa 和17.85%。挤压态合金的耐蚀性也明显优于铸态合金,其原因主要为晶粒细化。本文设计的新型生物医用Mg-3Zn-0.2Ca合金呈现出良好的综合力学性能以及耐蚀性。
Study on the microstructure and properties of Mg-3Zn-0.2Ca alloy for biomedical application
英文关键词:Mg-Zn-Ca alloy, microstructure, mechanical property, bio-corrosion behavior
英文摘要:
      Microstructure, mechanical properties and bio-corrosion properties of Mg–3Zn–0.2Ca alloys were investigated for biomedical application by optical microscopy (OM), scanning electronic microscopy (SEM), mechanical properties testing, electrochemical and immersion measurement, with the as-cast of this alloy as control. The XRD showed that the main second phases in the cast alloy were Mg-Zn intermetallic compounds such as Mg7Zn3, Mg2Zn3, and Mg4Zn7. In comparison with the cast alloy, the average grain size of the extruded Mg–3Zn–0.2Ca alloy was significantly decreased by 47.6 times from 119.1μm to 2.5μm after extrusion ratio 56:1. The yield tensile strength (0.2%YS), ultimate tensile strength and elongation of the extruded alloys were 205MPa, 336MPa and 17.85%, respectively. The electrochemical and the immersion tests showed that the corrosion resistance of the extruded alloy was obviously higher than that of the cast alloy due to the fine grained microstructure. The new designed Mg–3Zn–0.2Ca alloy showed the good combination of mechanical performance and corrosion resistance for biomedical application.
作者单位E-mail
杨敏 天津理工大学 debaoliu@126.com 
刘德宝 天津理工大学 debaoliu@126.com 
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