摘要
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α-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。
The effects of Er on the microstructures and the lattice parameters of the as cast Mg-5Sn-xEr （x=0, 0.5, 1, 1.5, 2, 4, 6, 8, 10） alloys were investigated by X-ray fluorescence（XRF）, optical microscopy（OM）, X-ray powder diffraction （XRD）, Scanning Electron Microscopy （SEM）/Energy Dispersive Spectroscopy （EDS）. The addition of Er will result in the grain refinement, inhibite the formation of the phase Mg2Sn, promote the formation of RE-phase with irregular polygon-like shape, so the Er-Adding has obvious effect on Mg-5Sn as cast alloy. The Rietvel whole pattern fitting methods were used to analyze the lattice parameters of a-Mg solid solution in different alloys, on base of it, the Er solubility was calculated with the Vegard＇Law on the orientation of a, c axis in a-Mg, respectively, the results show that the calculation of a axis is more reasonable.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第12期2481-2485,共5页
Rare Metal Materials and Engineering
基金
国家"973"重大基础研究项目(2007CB613700)
国家"十二五"科技支撑计划项目(2011BAE22B01-3)
科技部国际合作项目(2010DFR50010
2008DFR50040)
重庆市科委项目(CSTC
2010AA4048)
中央高校基本科研业务费(CDJXS11132228)
