| 1 | Distribution of Be in a Ti-Based Bulk Metallic Glass Composite Containing B-Ti显示文摘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 Ti_(47.5)Zr_(33)Cu_(5.8)Co_3Be_(12.5)(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. | L.Zhang W.Q.Li Z.W.Zhu H.M.Fu H.Li Z.K.Li H.W.Zhang A.M.Wang H.F.Zhang | 2017 | Journal of Materials Science & Technology2017，33，7： | 3 |
| 2 | New ductile laminate structure of Ti-alloy/Ti-based metallic glass composite with high specific strength显示文摘Bulk laminate structure of Ti-alloy/Ti-based metallic glass composite(MGC) was prepared by melting a preform of alternate stack-up foils in the high vacuum atmosphere. The composite demonstrates a good combination of yield strength(~1618 MPa), plasticity(~4.3%) and specific fracture strength(384 × 10~3 Nmkg^(-1)) in compression. The maintained yield strength results from the unique microstructure composed of the Ti layer, the solution layer with gradient structure and the MGC layer. Such a multilayer structure effectively inhibits the propagation of shear band, leading to the enhanced plasticity. Those extraordinary properities suggest that combining ductile lamella with brittle metallic glass(MG) by such a lay-up method can be an effective way to improve mechanical properties of MG. | D.Li Z.W.Zhu A.M.Wang H.M.Fu H.Li H.W.Zhang H.F.Zhang | 2018 | Journal of Materials Science & Technology2018，34，4： | 2 |
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