A5068804701- Glass properties and applications
- Metallic Glasses and Amorphous Alloys
- Crystal Structures and Properties
- Phase-change materials and chalcogenides
- Material Dynamics and Properties
- High-pressure geophysics and materials
- Shape Memory Alloy Transformations
Center for High Pressure Science and Technology Advanced Research
2020-2021
A 4:1 (volume ratio) methanol–ethanol (ME) mixture and silicone oil are two of the most widely used liquid pressure-transmitting media (PTM) in high-pressure studies. Their hydrostatic limits have been extensively studied using various methods; however, evolution atomic structures associated with their emerging nonhydrostaticity remains unclear. Here, we monitor as functions pressure up to ∼30 GPa at room temperature situ synchrotron x-ray diffraction (XRD), optical micro-Raman spectroscopy,...
Recently, solid-state amorphization through temperature-induced martensitic transition has been reported. The stability of the amorphous martensite phase, which co-exists with a crystalline counterpart, is intriguing but remains unclear. In this work, we studied structural Ti59.1Zr37Cu2.3Fe1.6 alloy by combining in situ high-pressure synchrotron x-ray diffraction ex transmission electron microscopy. During compression at room temperature, an irreversible pressure-induced crystallization...
Cerium-based metallic glasses are prototype polyamorphous systems with pressure-induced polyamorphic transitions extensively reported. Cooling typically has a similar effect on materials as compression regard to reducing volume. However, previous studies show dramatically different behavior of Ce-based between cooling and compression, whose origin remains unclear. Here, using in situ low-temperature synchrotron high-energy x-ray diffraction, the structural evolution Ce68Al10Cu20Co2 glass is...