High Pressure Quenched Glasses: unique structures and properties

Abstract

Zr-based metallic glasses are prepared by quenching supercooled liquid under pressure. These glasses are stable in ambient conditions after decompression. The High Pressure Quenched glasses have a distinct structure and properties. The pair distribution function shows redistribution of the Zr-Zr interatomic distances and their shift towards smaller values. These glasses exhibit higher density, hardness, elastic modulus, and yield stress. Upon heating at ambient pressure, they show volume expansion and distinct relaxation behavior, reaching an equilibrated state above the glass transition. These experimental results are consistent with an idea of pressure-induced low to high density liquid transition in the supercooled melt.

High-Pressure and Temperature Effects on the Clustering Ability of Monohydroxy Alcohols

“…High-pressure diffraction experiments have been a challenge which along with the development of synchrotron facilities and pressure compression systems became possible to realize for solid − and liquid samples. − Yet, the high-pressure X-ray diffraction measurements of weakly scattering liquids such as alcohols still remain difficult. On the other hand, the advance of molecular dynamics simulations enables to complement experimental data and also provides additional structural properties unachievable from experiments. ,− The combination of both simulation and experimental methods is the most effective to reveal new information about the structure of the liquid phase of various hydrogen-bonded systems.…”

“…High-pressure diffraction experiments have been a challenge which along with the development of synchrotron facilities and pressure compression systems became possible to realize for solid 5 − 9 and liquid samples. 10 − 14 Yet, the high-pressure X-ray diffraction measurements of weakly scattering liquids such as alcohols still remain difficult.…”