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Beryllium-distribution in metallic glass matrix composite containing beryllium 被引量:1

含Be非晶复合材料中Be元素的分布(英文)
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摘要 The morphologies, sizes, compositions and volume fractions of dendritic phases in in situ Ti-based metallic glass matrix composites (MGMCs) containing beryllium (Be) with the nominal composition of Tia7Zr19Cu5V12Be17 (mole fraction, %) were investigated using XRD, SEM, EBSD, TEM, EDS and three-dimensional reconstruction method. Moreover, visualized at the nanoscale, Be distribution is confirmed to be only present in the matrix using scanning transmission electron microscopy-electron energy loss spectroscopy (STEM-EELS). Based on these findings, it has been obtained that the accurate chemical compositions are Wi28.3Zr19.7Cu8V6.4Be37.6 (mole fraction, %) for glass matrix and Wi62.nZr18.aCu2.6V16.6 (mole fraction, %) for the dendritic phases, and the volume fractions are 38.5% and 61.5%, respectively. It is believed that the results are of particular importance for the designing of Be-containing MGMCs. 采用XRD、SEM、EBSD、TEM、EDS以及三维组织重构方法系统研究原位Be元素的Ti基非晶复合材料Ti_(47)Zr_(19)Cu_5V_(12)Be_(17)(摩尔分数,%)中晶体相的形态、尺寸、成分和体积分数,并采用STEM-EELS证明Be元素仅仅分布在非晶基体中。在此基础上,准确地得到了晶体相和非晶基体的化学成分分别为Ti_(62.4)Zr_(18.4)Cu_(2.6)V_(16.6)和Ti_(28.3)Zr_(19.7)Cu_8V_(6.4)Be_(37.6)(摩尔分数,%),相应的体积分数分别为61.5%和38.5%,该结果对设计原位含Be非晶复合材料具有重要的指导意义。
出处 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第1期110-116,共7页 中国有色金属学报(英文版)
基金 Project(11374028)supported by the National Natural Science Foundation of China Project supported by the Cheung Kong Scholars Program of China
关键词 metallic glass COMPOSITES microstructure electron energy loss spectroscopy Be-distribution 非晶 复合材料 微观结构 电子能量损失谱 Be元素分布
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