|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Discovering a Unique Thermal-driven Glass-glass Transition in Metallic Glass
||Qing Du, Xiongjun Liu, Qiaoshi Zeng, En Ma, Hui Wang, Yuan Wu, Z.P. Lu
|On-Site Speaker (Planned)
Analogous to the well-known polymorphism in crystalline materials, the polyamorphic transition in glassy matters is also a ubiquitous and intriguing phenomenon in the natural world, such as the glassy water (amorphous ice) can exit in two distinct forms: low- and high-density amorphous ices, under different pressures. Recently, pressure-induced glass-glass transitions (GGTs) have also been observed in some lanthanide-based and Ca-Al metallic glasses, where the GGT seems impossible due to their densely-packed atomic structures. In this talk, we will report a non-pressure-induced GGT in a metallic glass. In particular, the following information will be delivered: (1) a unique thermal-induced GGT under ambient pressure condition is discovered in this metallic glass;(2) both in-situ synchrotron X-ray experiments and atomistic simulations are performed for observation of structure revolution;(3) discuss the difference between the present and the previously reported GGTs in metallic glasses, and the importance of this finding.
||Planned: Supplemental Proceedings volume