Mg,Ca元素对可降解Zn合金组织性能影响

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 t 挤压后,纯 Zn晶粒尺寸达到100 μm;Zn-0.2Mg-Ca合金中晶粒尺寸均维持在15 -20 pm之间,并 存在第二相Mg2Znu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- 50 μm.纯 Zn的屈服强度和延伸率分别为64 MPa和 14%,Zn - 0. 2Mg - xCa合...

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Bibliographic Details
Published in东北大学学报（自然科学版） Vol. 39; no. 1; pp. 35 - 39
Main Author 王利卿;孙世能;任玉平;秦高梧
Format Journal Article
LanguageChinese
Published 东北大学 材料科学与工程学院,辽宁 沈阳 110819 2018
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
Subjects
Zn-Mg-Ca合金
力学性能
反向热挤压
显微组织
降解速率
Zn-Mg-Ca alloys
力学性能
indirect hot extrusion
反向热挤压
显微组织
degradation rate
microstructure
降解速率
Zn-Mg-Ca合金
mechanical property
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ISSN1005-3026
DOI10.12068/j.issn.1005-3026.2018.01.008

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Summary: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 t 挤压后,纯 Zn晶粒尺寸达到100 μm;Zn-0.2Mg-Ca合金中晶粒尺寸均维持在15 -20 pm之间,并 存在第二相Mg2Znu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- 50 μm.纯 Zn的屈服强度和延伸率分别为64 MPa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200 MPa,延伸率则逐渐由18%降低到6% .纯Zn和Z n-0.2Mg- xCa合金在SBF溶液中降解速率维持在0.05 -0. 15 mm ·a-1,而且随Ca的添加降解速率略有降低.
Bibliography:21-1344/T
WANG Li-qing1,2,SUN Shi-neng1,REN Yu-ping1,2,QIN Gao-wu1,2（1. School of Materials Science ＆ Engineering, Northeastern University, Shenyang 110819,China; 2. Key Laboratory for Anisotropy and Texture of Materials （Ministry of Education）,Northeastern University,Shenyang 110819, China.）
Zn-Mg-Ca alloys; indirect hot extrusion; microstructure; mechanical property; degradation rate
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 100 pm and Zn -0. 2Mg - xCa alloys were composed of refined grains with the size of 15 -20 pm and the second phases of MgqZnn and CaZn, 3. With increasing Ca addition,the amount of CaZn13 increased and the size of CaZn13 r
ISSN:1005-3026
DOI:10.12068/j.issn.1005-3026.2018.01.008