Pressure-induced amorphous-amorphous transition in pre-densified silica glass: an experimental exploration of the potential energy landscape
Abstract Despite the difficulty of experimentally studying polyamorphic transitions in high-Tg glasses, it is well known that silica glass has two high-density phases: the cold-compressed and hot-compressed high-density amorphous phases (c-HDA and h-HDA). By means of vibrational spectroscopy techniq...
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Nature Portfolio
2025-02-01
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| Online Access: | https://doi.org/10.1038/s41598-025-89802-7 |
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| author | M. Courtois A. Berthelot A. Cornet S. Le Floch C. Martinet T. Deschamps |
| author_facet | M. Courtois A. Berthelot A. Cornet S. Le Floch C. Martinet T. Deschamps |
| author_sort | M. Courtois |
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| description | Abstract Despite the difficulty of experimentally studying polyamorphic transitions in high-Tg glasses, it is well known that silica glass has two high-density phases: the cold-compressed and hot-compressed high-density amorphous phases (c-HDA and h-HDA). By means of vibrational spectroscopy techniques under pressure, we first evidence that the yield strength under hydrostatic pressure is identical for glasses of similar density, whatever the thermo-mechanical history, showing that the elastic limit of a silica glass depends solely of its density. Our results also reveal the changes in the energy landscape of amorphous silica under high pressure. Above a certain threshold pressure, the energy barriers between the different amorphous phases vanish and the glass is automatically driven toward the c-HDA phase, whatever the initial structure and the temperature of compression. Very high pressures can therefore erase all traces of a glass’s thermodynamic history. |
| format | Article |
| id | doaj-art-0648c91dd5fa47d19fa5a63414bad55e |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-0648c91dd5fa47d19fa5a63414bad55e2025-08-20T02:16:40ZengNature PortfolioScientific Reports2045-23222025-02-011511910.1038/s41598-025-89802-7Pressure-induced amorphous-amorphous transition in pre-densified silica glass: an experimental exploration of the potential energy landscapeM. Courtois0A. Berthelot1A. Cornet2S. Le Floch3C. Martinet4T. Deschamps5Institut Lumière Matière UMR CNRS 5306, Université Claude Bernard Lyon 1, CNRSInstitut Lumière Matière UMR CNRS 5306, Université Claude Bernard Lyon 1, CNRSInstitut Néel, Université Grenoble Alpes and Centre National de la Recherche ScientifiqueInstitut Lumière Matière UMR CNRS 5306, Université Claude Bernard Lyon 1, CNRSInstitut Lumière Matière UMR CNRS 5306, Université Claude Bernard Lyon 1, CNRSInstitut Lumière Matière UMR CNRS 5306, Université Claude Bernard Lyon 1, CNRSAbstract Despite the difficulty of experimentally studying polyamorphic transitions in high-Tg glasses, it is well known that silica glass has two high-density phases: the cold-compressed and hot-compressed high-density amorphous phases (c-HDA and h-HDA). By means of vibrational spectroscopy techniques under pressure, we first evidence that the yield strength under hydrostatic pressure is identical for glasses of similar density, whatever the thermo-mechanical history, showing that the elastic limit of a silica glass depends solely of its density. Our results also reveal the changes in the energy landscape of amorphous silica under high pressure. Above a certain threshold pressure, the energy barriers between the different amorphous phases vanish and the glass is automatically driven toward the c-HDA phase, whatever the initial structure and the temperature of compression. Very high pressures can therefore erase all traces of a glass’s thermodynamic history.https://doi.org/10.1038/s41598-025-89802-7Silica glassHigh-pressurePolyamorphismPotential energy landscape |
| spellingShingle | M. Courtois A. Berthelot A. Cornet S. Le Floch C. Martinet T. Deschamps Pressure-induced amorphous-amorphous transition in pre-densified silica glass: an experimental exploration of the potential energy landscape Scientific Reports Silica glass High-pressure Polyamorphism Potential energy landscape |
| title | Pressure-induced amorphous-amorphous transition in pre-densified silica glass: an experimental exploration of the potential energy landscape |
| title_full | Pressure-induced amorphous-amorphous transition in pre-densified silica glass: an experimental exploration of the potential energy landscape |
| title_fullStr | Pressure-induced amorphous-amorphous transition in pre-densified silica glass: an experimental exploration of the potential energy landscape |
| title_full_unstemmed | Pressure-induced amorphous-amorphous transition in pre-densified silica glass: an experimental exploration of the potential energy landscape |
| title_short | Pressure-induced amorphous-amorphous transition in pre-densified silica glass: an experimental exploration of the potential energy landscape |
| title_sort | pressure induced amorphous amorphous transition in pre densified silica glass an experimental exploration of the potential energy landscape |
| topic | Silica glass High-pressure Polyamorphism Potential energy landscape |
| url | https://doi.org/10.1038/s41598-025-89802-7 |
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