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本实验借助于XRF、OM、XRD、SEM等测试方法对铸态合金Mg-5Sn-xEr (x=0,0.5,1,1.5,2,2.5,4,6,8,10)进行了研究,结果发现稀土Er对合金的晶粒有明显的细化,还可以抑制圆盘状Mg2Sn相的形成,促进不规则形状稀土相的形成,因此稀土Er对铸态Mg-5Sn合金的显微组织及物相有显著影响.本工作通过对合金的衍射谱线进行了全谱拟合,计算了不同合金中的a-Mg固溶体的晶格常数,并在此基础上用Vegard' Law分别计算出Er在α-Mg基体中a,c轴方向的的固溶度大小,结果表明在a轴方向的计算结果更为合理.

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