王建利,万银,朱美玲,马志军,郭永春,杨忠,李建平.Sr元素对Mg-Zn-Ca合金非晶形成能力和耐蚀性的影响[J].稀有金属材料与工程,2018,47(7):2151~2158.[WANG Jian-Li,WAN Yin,Zhu Mei-ling,MA Zhijun,Guo Yong-chun,Yang Zhong,LI Jian-Ping.Effect of Sr element on the glass forming ability and corrosion properties of bulk Mg-Zn-Ca alloys[J].Rare Metal Materials and Engineering,2018,47(7):2151~2158.]
Sr元素对Mg-Zn-Ca合金非晶形成能力和耐蚀性的影响
投稿时间:2017-05-17  修订日期:2017-07-18
中文关键词:  Mg-Zn-Ca-Sr非晶合金  非晶形成能力  腐蚀性能
基金项目:国家自然科学基金资助(项目号51201120),陕西省科技统筹创新工程计划项目(2016KTZDGY-04-01), 陕西省教育厅重点实验室项目
中文摘要:
      为改善Mg-Zn-Ca合金的非晶形成能力,本文采用铜模喷铸法制备了不同Sr含量的Mg-Zn-Ca-Sr合金2 mm和4mm棒材试样。利用XRD、SEM、DSC和电化学测试方法研究了Sr元素对Mg-Zn-Ca合金非晶形成能力和在模拟体液中耐蚀性的影响。结果表明,Mg65Zn30Ca5-xSrx(x=0,0.5,1.0,1.5, at%)合金的2mm棒材试样组织均为非晶态,而4mm棒材试样均是由非晶和晶体相(Mg和MgZn相)组,但晶体相的体积分数和尺寸随着Sr元素添加量的增加而减少,即合金的非晶形成能力提高,其中,Mg65Zn30Ca4Sr1合金非晶形成能力最强。电化学腐蚀测试结果表明随着Sr含量增多,合金的腐蚀电位向正向移动,腐蚀电流密度减小,合金的耐蚀性逐渐增强,2mm棒材试样中Mg65Zn30Ca4Sr0.5合金的耐蚀性最好,4mm棒材试样中Mg65Zn30Ca4Sr1合金的耐蚀性最强。
Effect of Sr element on the glass forming ability and corrosion properties of bulk Mg-Zn-Ca alloys
英文关键词:Mg-Zn-Ca-Sr amorphous alloys  Glass forming ability  Corrosion properties
英文摘要:
      In order to improve the glass forming ability of Mg-Zn-Ca alloy, 2mm and 4mm rod samples of Mg-Zn-Ca-Sr alloys with different amount of Sr were prepared by copper mould injection method. Effects of Sr addition on glass forming ability and corrosion properties in simulated body fluids of Mg-Zn-Ca alloys were studied by means of X-ray diffraction, scanning electron microscopy, differential scanning calorimeter and electrochemical test. Results showed that with the increasing content of Sr element, the 2mm rod samples were all in completely amorphous state. While the microstructure of 4 mm rod samples were composed of amorphous phase and crystalline Mg and MgZn phases. However, the volume fraction and particle size were decreased with increasing addition of Sr element, which indicated that the glass forming ability of Mg-Zn-Ca alloy was enhanced with Sr element addition. Mg65Zn30Ca4Sr1 alloy exhibited the highest glass forming ability. The results of electrochemical test demonstrated that Sr-doped samples showed more positive corrosion potential and smaller corrosion current density, which suggested that the corrosion resistance was improved with increasing addition of Sr element. The corrosion resistance of Mg65Zn30Ca4.5Sr0.5 alloy was the highest among the 2mm rod samples, while the corrosion resistance of Mg65Zn30Ca4Sr1 alloy was the best among the 4mm rod samples.
作者单位E-mail
王建利 西安工业大学材料与化工学院 wjl810325@163.com 
万银 西安工业大学材料与化工学院  
朱美玲 西安工业大学材料与化工学院  
马志军 西安工业大学材料与化工学院  
郭永春 西安工业大学材料与化工学院  
杨忠 西安工业大学材料与化工学院  
李建平 西安工业大学材料与化工学院  
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