Break-down of the relationship between α-relaxation and equilibration in hydrostatically compressed metallic glasses
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| author | Cornet, Antoine Shen, Jie Ronca, Alberto Li, Shubin Neuber, Nico Frey, Maximilian Pineda, Eloi Deschamps, Thierry Martinet, Christine Floch, Sylvie Le Cangialosi, Daniele Chushkin, Yuriy Zontone, Federico Cammarata, Marco Vaughan, Gavin B. M. di Michiel, Marco Garbarino, Gaston Busch, Ralf Gallino, Isabella Goujon, Celine Legendre, Murielle Manthilake, Geeth Ruta, Beatrice |
| author_facet | Cornet, Antoine Shen, Jie Ronca, Alberto Li, Shubin Neuber, Nico Frey, Maximilian Pineda, Eloi Deschamps, Thierry Martinet, Christine Floch, Sylvie Le Cangialosi, Daniele Chushkin, Yuriy Zontone, Federico Cammarata, Marco Vaughan, Gavin B. M. di Michiel, Marco Garbarino, Gaston Busch, Ralf Gallino, Isabella Goujon, Celine Legendre, Murielle Manthilake, Geeth Ruta, Beatrice |
| contents | Glasses encode the memory of any thermo-mechanical treatment applied to them. This ability is associated to the existence of a myriad of metastable amorphous states which can be probed through different experimental pathways. It is usually assumed that this memory can be erased in the supercooled liquid, and that this process occurs on a time scale controlled by the α-relaxation. We find that this assumption does not apply for hydrostatically compressed glasses. Annealing under pressure a prototypical metallic glass can irreversibly modify its dynamics, thermodynamics and structure, reduce the atomic mobility and lead to structural modifications of the first coordination shells which reduce the thermal stability with respect to a glass annealed in absence of pressure. When heated above their glass transition temperature, these compressed glasses do not convert into the pristine supercooled liquid, implying the existence of an additional process, beyond the α-relaxation, contributing to the equilibrium recovery of the material. These results establish pressure as a powerful tool for engineering non-equilibrium glassy materials with tailored properties, while deepening our understanding of relaxation dynamics in disordered systems under extreme conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_13636 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Break-down of the relationship between α-relaxation and equilibration in hydrostatically compressed metallic glasses Cornet, Antoine Shen, Jie Ronca, Alberto Li, Shubin Neuber, Nico Frey, Maximilian Pineda, Eloi Deschamps, Thierry Martinet, Christine Floch, Sylvie Le Cangialosi, Daniele Chushkin, Yuriy Zontone, Federico Cammarata, Marco Vaughan, Gavin B. M. di Michiel, Marco Garbarino, Gaston Busch, Ralf Gallino, Isabella Goujon, Celine Legendre, Murielle Manthilake, Geeth Ruta, Beatrice Materials Science Glasses encode the memory of any thermo-mechanical treatment applied to them. This ability is associated to the existence of a myriad of metastable amorphous states which can be probed through different experimental pathways. It is usually assumed that this memory can be erased in the supercooled liquid, and that this process occurs on a time scale controlled by the α-relaxation. We find that this assumption does not apply for hydrostatically compressed glasses. Annealing under pressure a prototypical metallic glass can irreversibly modify its dynamics, thermodynamics and structure, reduce the atomic mobility and lead to structural modifications of the first coordination shells which reduce the thermal stability with respect to a glass annealed in absence of pressure. When heated above their glass transition temperature, these compressed glasses do not convert into the pristine supercooled liquid, implying the existence of an additional process, beyond the α-relaxation, contributing to the equilibrium recovery of the material. These results establish pressure as a powerful tool for engineering non-equilibrium glassy materials with tailored properties, while deepening our understanding of relaxation dynamics in disordered systems under extreme conditions. |
| title | Break-down of the relationship between α-relaxation and equilibration in hydrostatically compressed metallic glasses |
| topic | Materials Science |
| url | https://arxiv.org/abs/2409.13636 |