Comment on “High Mixing Entropy Enhanced Energy States in Metallic Glasses”

Achieving high energy absorption capacity in cellular bulk metallic glasses

Cellular bulk metallic glasses (BMGs) have exhibited excellent energy-absorption performance by inheriting superior strength from the parent BMGs. However, how to achieve high energy absorption capacity in cellular BMGs is vital but mysterious. In this work, using step-by-step observations of the deformation evolution of a series of cellular BMGs, the underlying mechanisms for the remarkable en...

Comment on ‘‘High-Frequency Dynamics in Metallic

A recent Letter reports x-ray Brillouin data on a metallic glass, Ni33Zr67 [1]. Longitudinal acoustic (LA) excitations of energy @ are found well above an independently observed boson peak (BP), located at @ BP ’ 3 meV. The authors claim that Ni33Zr67 is strong in the sense of Angell [2]. From the linewidth of the acoustic signal, they also claim a Ioffe-Regel (IR) crossover, = , at @ IR ’ 23 m...

High-frequency dynamics in metallic glasses.

Using inelastic x-ray scattering we studied the collective dynamics of the glassy alloy Ni33Zr67 in the first pseudo-Brillouin-zone, an energy-momentum region still unexplored in metallic glasses. We determine key properties such as the momentum transfer dependence of the sound velocity and of the acoustic damping, discussing the results in the general context of recently proposed pictures for ...

Superconductivity in Metallic Glasses

On the origin of multi-component bulk metallic glasses: Atomic size mismatches and de-mixing.

The likelihood that an undercooled liquid vitrifies or crystallizes depends on the cooling rate R. The critical cooling rate R(c), below which the liquid crystallizes upon cooling, characterizes the glass-forming ability (GFA) of the system. While pure metals are typically poor glass formers with R(c)>10(12)K/s, specific multi-component alloys can form bulk metallic glasses (BMGs) even at cooli...