|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Thermal Structural Evolution of Zr-based Metallic Glasses and Liquids Investigated by High Energy X-ray Diffraction and Inelastic Neutron Scattering
||Zengquan Wang, Wojciech Dmowski, Yang Tong, Takeshi Egami, Adam J. Vogt, Kenneth Kelton
|On-Site Speaker (Planned)
In this work, the structural evolutions of Zr65Cu17Ni8Al10 and Zr80Pt20 metallic glass samples were studied by in-situ high energy X-ray and neutron diffraction. X-ray patterns were collected from RT up to 1300 K and the structure functions and PDFs were analyzed. Glass transition, nano-crystallization, and liquid transition were observed in the Zr65Cu17Ni8Al10 sample during the heating. The extrapolated structure function changes smoothly from the supercooled region to the liquid state. In the Zr80Pt20 sample, a transition is observed at 430 oC resulting in nano-crystalline phase, and another phase transition is observed at higher temperature. Furthermore, the local dynamics in Zr80Pt20 liquid were studied by inelastic neutron scattering with electro-static levitation. Combining with molecular dynamics simulation, the different thermal structural evolutions are tentatively explained by the topological and chemical effects of the atomic pairs in these alloys.
||Planned: Supplemental Proceedings volume