Relaxation effect on crystal nucleation in a glass unveiled by experimental, numerical, and analytical approaches

In this work, we significantly extend our new approach for analyzing nucleation kinetics below the glass transition, Tg, which considers the structural relaxation effect. Using a 5BaO·8SiO2 (B5S8) glass, we showed a significant stepwise change in the nucleation relaxation time, τsr, with temperature...

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Bibliographic Details
Published in:Acta materialia 2022-01, Vol.223, p.117458, Article 117458
Main Authors: Rodrigues, Lorena R., Abyzov, Alexander S., Fokin, Vladimir M., Schmelzer, Jürn W.P., Zanotto, Edgar D.
Format: Article
Language:English
Subjects:
Crystal growth
Crystallization
Glass
Glass transition
Nucleation
Phase transition
Relaxation
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Summary:In this work, we significantly extend our new approach for analyzing nucleation kinetics below the glass transition, Tg, which considers the structural relaxation effect. Using a 5BaO·8SiO2 (B5S8) glass, we showed a significant stepwise change in the nucleation relaxation time, τsr, with temperature in the Tg region, in contrast with the expected monotonous variation with temperature: τsr is four times shorter for the supercooled liquid than for the glass. Then, using a combination of new experimental data and theoretical (analytical and numerical) analyses, we advance an interpretation within the Classical Nucleation Theory (CNT) framework that brings together the nucleation rates in the T > Tg and T 
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2021.117458