东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (1): 35-39.DOI: 10.12068/j.issn.1005-3026.2018.01.008

• 材料与冶金 • 上一篇    下一篇

Mg,Ca元素对可降解Zn合金组织性能影响

王利卿1,2, 孙世能1,2, 任玉平1,2, 秦高梧1,2   

  1. (1. 东北大学 材料科学与工程学院, 辽宁 沈阳110819; 2. 东北大学 材料各向异性与织构教育部重点实验室, 辽宁 沈阳110819)
  • 收稿日期:2016-08-08 修回日期:2016-08-08 出版日期:2018-01-15 发布日期:2018-01-31
  • 通讯作者: 王利卿
  • 作者简介:王利卿(1988-),男,山西朔州人,东北大学博士研究生; 秦高梧(1975-),男,江苏盐城人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51371046,51525101); 中央高校基本科研业务费专项资金资助项目(N141008001).

Effect of Mg, Ca Addition on Microstructure and Properties of Biodegradable Zn Alloy

WANG Li-qing1,2, SUN Shi-neng1,2, REN Yu-ping1,2, QIN Gao-wu1,2   

  1. 1. School of Materials Science & Engineering, Northeastern University, Shenyang 110819, China; 2. Key Laboratory for Anisotropy and Texture of Materials
  • Received:2016-08-08 Revised:2016-08-08 Online:2018-01-15 Published:2018-01-31
  • Contact: QIN Gao-wu
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摘要: 采用X射线衍射、扫描电子显微镜、光学显微镜、室温拉伸和浸泡失重法研究了挤压态纯Zn和Zn-0.2Mg-xCa(x=0,0.06,0.15,0.3)(质量分数)合金微观组织、力学性能和体外降解速率.结果表明:200℃挤压后,纯Zn晶粒尺寸达到100μm;Zn-0.2Mg-xCa合金中晶粒尺寸均维持在15~20μm之间,并存在第二相Mg2Zn11和CaZn13.随着Ca含量增加,CaZn13含量逐渐增加,且当Ca质量分数达到0.15%以上时CaZn13尺寸达到15~50μm.纯Zn的屈服强度和延伸率分别为64MPa和14%,Zn-0.2Mg-xCa合金随着Ca含量增加屈服强度由180MPa提高到约200MPa,延伸率则逐渐由18%降低到6%.纯Zn和Zn-0.2Mg-xCa合金在SBF溶液中降解速率维持在0.05~0.15mm·a-1,而且随Ca的添加降解速率略有降低.

关键词: Zn-Mg-Ca合金, 反向热挤压, 显微组织, 力学性能, 降解速率

Abstract: Pure Zn and Zn-0.2Mg-xCa (x=0, 0.06, 0.15 and 0.3,mass fraction) alloys were prepared by indirect hot extrusion. The microstructure, mechanical properties and in vitro degradation rate of extruded Zn-based alloys were investigated by X-ray diffraction, scanning electron microscopy, optical microscope, tensile test and immersion test. The results showed that pure Zn consisted of equiaxed grains with the size of 100μm and Zn-0.2Mg-xCa alloys were composed of refined grains with the size of 15~20μm and the second phases of Mg2Zn11 and CaZn13. With increasing Ca addition, the amount of CaZn13 increased and the size of CaZn13 reached 15~50μm when the Ca mass fraction was over 0.15%. The yield strength and elongation of pure Zn was 64MPa and 14%, respectively. With increasing Ca addition, the yield strength of Zn-0.2Mg-xCa increased from 180MPa to 200MPa, while the elongation decreased from 18% to 6%. The degradation rate of Zn and Zn-0.2Mg-xCa kept between 0.05~0.15mm·a-1 and decreased with Ca addition.

Key words: Zn-Mg-Ca alloys, indirect hot extrusion, microstructure, mechanical property, degradation rate

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