Bond Switching in Densified Oxide Glass Enables Record-High Fracture Toughness
| Autor: | Theany To, Morten Mattrup Smedskjær, Mathieu Bauchy, Johan Frederik Schou Christensen, Michal Bockowski, Rasmus Christensen, Søren Strandskov Sørensen, Lars Rosgaard Jensen |
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| Rok vydání: | 2021 |
| Předmět: |
toughening mechanism
010302 applied physics Toughness Materials science Bond Oxide High fracture bond switching 02 engineering and technology Plasticity 021001 nanoscience & nanotechnology 01 natural sciences Toughening molecular dynamics fracture toughness chemistry.chemical_compound oxide glasses Fracture toughness chemistry 0103 physical sciences Fracture (geology) General Materials Science Composite material 0210 nano-technology |
| Zdroj: | To, T, Sørensen, S S, Christensen, J F S, Christensen, R, Jensen, L R, Bockowski, M, Bauchy, M & Smedskjær, M M 2021, ' Bond Switching in Densified Oxide Glass Enables Record-High Fracture Toughness ', ACS Applied Materials & Interfaces, vol. 13, no. 15, pp. 17753–17765 . https://doi.org/10.1021/acsami.1c00435 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c00435 |
| Popis: | Humans primarily interact with information technology through glass touch screens, and the world would indeed be unrecognizable without glass. However, the low toughness of oxide glasses continues to be their Achilles heel, limiting both future applications and the possibility to make thinner, more environmentally friendly glasses. Here, we show that with proper control of plasticity mechanisms, record-high values of fracture toughness for transparent bulk oxide glasses can be achieved. Through proper combination of gas-mediated permanent densification and rational composition design, we increase the glasses' propensity for plastic deformation. Specifically, we demonstrate a fracture toughness of an aluminoborate glass (1.4 MPa m0.5) that is twice as high as that of commercial glasses for mobile devices. Atomistic simulations reveal that the densification of the adaptive aluminoborate network increases coordination number changes and bond swapping, ultimately enhancing plasticity and toughness upon fracture. Our findings thus provide general insights into the intrinsic toughening mechanisms of oxide glasses. |
| Databáze: | OpenAIRE |
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