Some strange things about the mechanical properties of glass
Glasses and crystals from the same chemical system mostly share the same interatomic bond strength. Nevertheless, they differ by the arrangement of bonds in space, which gives birth to different atomic packing efficiencies. We show in this review that as far as the elastic moduli and hardness are co...
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Académie des sciences
2023-01-01
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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.126/ |
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| author | Rouxel, Tanguy |
| author_facet | Rouxel, Tanguy |
| author_sort | Rouxel, Tanguy |
| collection | DOAJ |
| description | Glasses and crystals from the same chemical system mostly share the same interatomic bond strength. Nevertheless, they differ by the arrangement of bonds in space, which gives birth to different atomic packing efficiencies. We show in this review that as far as the elastic moduli and hardness are concerned, the atomic packing density predominates over the bond strength. The shear modulus of crystalline phases is usually much larger than the one of glasses with the same stoichiometric composition, thanks to a more efficient packing of atoms in the former. In contrast, the increase in hardness is quite limited, likely because of the additional contribution of dislocation activity to the deformation processes beneath the indenter in the case of crystals (shear plasticity). We also show that the occurrence of chemical heterogeneities (weak channels) at the mesoscopic scale in glasses, which is often associated with the lack of long range atomic ordering, promotes easy fracture paths and is responsible for the low toughness and fracture surface energy. |
| format | Article |
| id | doaj-art-8201a86f0ec54ebca4e459336ce0bc54 |
| institution | Kabale University |
| issn | 1878-1535 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Physique |
| spelling | doaj-art-8201a86f0ec54ebca4e459336ce0bc542025-02-07T13:52:27ZengAcadémie des sciencesComptes Rendus. Physique1878-15352023-01-0124S19911210.5802/crphys.12610.5802/crphys.126Some strange things about the mechanical properties of glassRouxel, Tanguy0https://orcid.org/0000-0002-9961-2458Glasses and Mechanics Lab., Physics Institute (IPR), UMR UR1-CNRS 6251, Université de Rennes, Campus de Beaulieu, 35042 Rennes cedex, France; Institut Universitaire de France, FranceGlasses and crystals from the same chemical system mostly share the same interatomic bond strength. Nevertheless, they differ by the arrangement of bonds in space, which gives birth to different atomic packing efficiencies. We show in this review that as far as the elastic moduli and hardness are concerned, the atomic packing density predominates over the bond strength. The shear modulus of crystalline phases is usually much larger than the one of glasses with the same stoichiometric composition, thanks to a more efficient packing of atoms in the former. In contrast, the increase in hardness is quite limited, likely because of the additional contribution of dislocation activity to the deformation processes beneath the indenter in the case of crystals (shear plasticity). We also show that the occurrence of chemical heterogeneities (weak channels) at the mesoscopic scale in glasses, which is often associated with the lack of long range atomic ordering, promotes easy fracture paths and is responsible for the low toughness and fracture surface energy.https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.126/GlassMechanical propertiesElasticityHardnessFracture toughness |
| spellingShingle | Rouxel, Tanguy Some strange things about the mechanical properties of glass Comptes Rendus. Physique Glass Mechanical properties Elasticity Hardness Fracture toughness |
| title | Some strange things about the mechanical properties of glass |
| title_full | Some strange things about the mechanical properties of glass |
| title_fullStr | Some strange things about the mechanical properties of glass |
| title_full_unstemmed | Some strange things about the mechanical properties of glass |
| title_short | Some strange things about the mechanical properties of glass |
| title_sort | some strange things about the mechanical properties of glass |
| topic | Glass Mechanical properties Elasticity Hardness Fracture toughness |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.126/ |
| work_keys_str_mv | AT rouxeltanguy somestrangethingsaboutthemechanicalpropertiesofglass |