Distribution of Be in a Ti-Based Bulk Metallic Glass Composite Containing B-Ti. Issue 7 (July 2017)

• Record Type: Journal Article
• Authors: Zhang, L.; Li, W.Q.; Zhu, Z.W.; Fu, H.M.; Li, H.; Li, Z.K.; Zhang, H.W.; Wang, A.M.; Zhang, H.F.
• Is Part Of: Journal of materials science & technology. Volume 33:Issue 7(2017:Jul.)
• Page Start: 708
• Page End: 711
• Publication Date: 2017-07
• Subjects: Bulk metallic glass (BMG) -- Metallic glass composite -- Beryllium -- Quasi-equilibrium; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2016.03.025
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract : 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 Ti47.5 Zr33 Cu5.8 Co3 Be12.5 (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.