Distribution of Be in a Ti-Based Bulk Metallic Glass Composite Containing B-Ti

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2017,（7）
• 页码范围: 708-711
• 页数: 4页
• 语种: 英文

摘要

In order to obtain a glassy matrix during quenching,Be is often selected as a constituent of the compositions of Ti/Zr-based bulk metallic glass composites (BMGCs).The in situ formed β phase in Be-bearing BMGCs was reported to be Be-free.However,a thorough investigation of the distribution of Be in BMGCs is still missing to date.In this work,the distribution of Be in a Ti47.5Zr33Cu5.8Co3Be12.5 (at.％) BMGC was studied by the secondary ion mass spectrometry (SIMS) and the electron energy loss spectroscopy (EELS).It is found that Be almost totally dissolves in the glassy matrix,but a very weak intensity of Be in β phase is still detectable by SIMS,and the content of Be in β-Ti is estimated to be about 0.3 at.％.Based on the recently established two-phase quasi-equilibrium of BMGCs,the distinct solubility of Be in the glassy matrix and in β-Ti has been explained.