中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 27 No. 1 January 2017 |
（1. Institute of Microstructure and Property of Advanced Materials,
Beijing University of Technology, Beijing 100124, China;
2. Center for Biological Imaging, Core Facilities for Protein Science,
Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101;
3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
4. State Key Laboratory for Advanced Metals and Materials,
University of Science and Technology Beijing, Beijing 100083, China;
5. Department of Materials Science and Engineering,
State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China）
Abstract: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.
Key words: metallic glass; composites; microstructure; electron energy loss spectroscopy; Be-distribution
