Beryllium-distribution in metallic glass matrix composite containing beryllium

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• 作者：Zhen-xi GUO^a ; ^b ; ^{guozhenxi9999@ibp.ac.cn} ; Yong-sheng WANG^c ; ^d ; Lu-jun ZHU^a ; Yue-fei ZHANG^a ; Zhen-hua ZHANG^a ; Xiao-xing KE^a ; Jun-pin LIN^d ; Guo-jian HAO^d ; Ze ZHANG^a ; ^e ; Man-ling SUI^a
• 关键词：metallic glass ; composites ; microstructure ; electron energy loss spectroscopy ; Be-distribution
• 刊名：Transactions of Nonferrous Metals Society of China
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：27
• 期：1
• 页码：110-116
• 全文大小：2893 K
• 卷排序：27

文摘

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 Ti47Zr19Cu5V12Be17 (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 Ti28.3Zr19.7Cu8V6.4Be37.6 (mole fraction, %) for glass matrix and Ti62.4Zr18.4Cu2.6V16.6 (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.