GRAPHENE

New discoveries and insights into the glass transition

A collaborative group from Tohoku College and Johns Hopkins College have offered invaluable insights into the glass transition.

When a liquid is cooled quickly, it beneficial properties viscosity and finally turns into a inflexible stable glass. The purpose at which it does so is called the glass transition.

However the precise physics behind the glass transition, and the character of glass generally, nonetheless pose many questions for scientists.

Metallic Glasses (MGs) are extremely wanted since they mix the flexibleness of plastic with the energy of metal. They’re amorphous supplies with a disordered atomic construction and exhibit distinctive and divergent thermodynamic and dynamic traits, particularly when approaching the glass-transition temperature.

The glass transition in MGs is often decided by calorimetric and dynamical measurements. The calorimetric glass transition detects the temperature at which particular warmth has an abrupt leap, whereas dynamical transition appears to be like on the numerous rest responses that emerge with growing temperature varieties.

Typically, the calorimetric glass-transition temperature follows the identical pattern because the dynamic α-relaxation temperature.

Nevertheless, the collaborative group found that top configuration entropy considerably influences the glass transition of MGs and results in the decoupling between calorimetric and dynamical glass transitions of excessive entropy metallic glasses.

The outcomes of their analysis have been printed within the journal Nature Communication on June 22, 2021.

Their research presents a brand new glass-forming system that makes use of excessive configurational entropy, named excessive entropy metallic glasses (HEMGs).

The group featured Specifically Appointed Professor Jing Jiang and Professor Hidemi Kato from the Institute for Supplies Analysis at Tohoku College and Professor Mingwei Chen from Johns Hopkins College.

“We’re enthusiastic about this discovery and imagine this work furthers our understanding of the basic mechanism behind the glass transition,” mentioned members of the analysis group.

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Materials offered by Tohoku University. Notice: Content material could also be edited for fashion and size.

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