Entropy of metallic glasses and the size effect on glass transition
A statistical description of metallic glasses is proposed based on evaluation of an entropy and using the concept of potential energy landscape (PEL). The PEL is probed using nano-indentation, assuming that serrations observed are related to local energy levels. Serrations sizes follow a Poisson dis...
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| Format: | Article |
| Language: | English |
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Académie des sciences
2023-02-01
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| Series: | Comptes Rendus. Physique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.130/ |
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| author | Champion, Yannick |
| author_facet | Champion, Yannick |
| author_sort | Champion, Yannick |
| collection | DOAJ |
| description | A statistical description of metallic glasses is proposed based on evaluation of an entropy and using the concept of potential energy landscape (PEL). The PEL is probed using nano-indentation, assuming that serrations observed are related to local energy levels. Serrations sizes follow a Poisson distribution consistent with, that their formation is a rare events. An entropy is derived revealing parameters characterizing the glass structure. The relevance of the approach is tested on the size effect on mechanical properties of metallic glass. It is noticed that the relations explain the effect of film thickness on the glass transition temperature observed for glass polymers. |
| format | Article |
| id | doaj-art-e555faf2a5874e068117d694d1b520a4 |
| institution | Kabale University |
| issn | 1878-1535 |
| language | English |
| publishDate | 2023-02-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Physique |
| spelling | doaj-art-e555faf2a5874e068117d694d1b520a42025-02-07T13:52:27ZengAcadémie des sciencesComptes Rendus. Physique1878-15352023-02-0124S115516410.5802/crphys.13010.5802/crphys.130Entropy of metallic glasses and the size effect on glass transitionChampion, Yannick0https://orcid.org/0000-0003-0147-6919Univ. Grenoble Alpes, CNRS, Grenoble-INP, SIMaP, 38000 Grenoble, France.A statistical description of metallic glasses is proposed based on evaluation of an entropy and using the concept of potential energy landscape (PEL). The PEL is probed using nano-indentation, assuming that serrations observed are related to local energy levels. Serrations sizes follow a Poisson distribution consistent with, that their formation is a rare events. An entropy is derived revealing parameters characterizing the glass structure. The relevance of the approach is tested on the size effect on mechanical properties of metallic glass. It is noticed that the relations explain the effect of film thickness on the glass transition temperature observed for glass polymers.https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.130/Metallic glassEntropyNano-indentationMechanical behaviorGlass transition |
| spellingShingle | Champion, Yannick Entropy of metallic glasses and the size effect on glass transition Comptes Rendus. Physique Metallic glass Entropy Nano-indentation Mechanical behavior Glass transition |
| title | Entropy of metallic glasses and the size effect on glass transition |
| title_full | Entropy of metallic glasses and the size effect on glass transition |
| title_fullStr | Entropy of metallic glasses and the size effect on glass transition |
| title_full_unstemmed | Entropy of metallic glasses and the size effect on glass transition |
| title_short | Entropy of metallic glasses and the size effect on glass transition |
| title_sort | entropy of metallic glasses and the size effect on glass transition |
| topic | Metallic glass Entropy Nano-indentation Mechanical behavior Glass transition |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.130/ |
| work_keys_str_mv | AT championyannick entropyofmetallicglassesandthesizeeffectonglasstransition |