Abstract
Oxide glasses are an integral part of the modern world, but their usefulness can be limited by their characteristic brittleness at room temperature. We show that amorphous aluminum oxide can permanently deform without fracture at room temperature and high strain rate by a viscous creep mechanism. These thin-films can reach flow stress at room temperature and can flow plastically up to a total elongation of 100%, provided that the material is dense and free of geometrical flaws. Our study demonstrates a much higher ductility for an amorphous oxide at low temperature than previous observations. This discovery may facilitate the realization of damage-tolerant glass materials that contribute in new ways, with the potential to improve the mechanical resistance and reliability of applications such as electronic devices and batteries.
Original language | English |
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Pages (from-to) | 864-869 |
Number of pages | 6 |
Journal | Science |
Volume | 366 |
Issue number | 6467 |
DOIs | |
Publication status | Published - 15 Nov 2019 |
Publication type | A1 Journal article-refereed |
Publication forum classification
- Publication forum level 3
ASJC Scopus subject areas
- General
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Dive into the research topics of 'Highly ductile amorphous oxide at room temperature and high strain rate'. Together they form a unique fingerprint.Equipment
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Advanced mechanics of materials
Hokka, M. (Contact), Mohanty, G. (Contact) & Isakov, M. (Contact)
Materials Science and Environmental EngineeringFacility/equipment: Facility
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Ceramic processing
Levänen, E. (Contact) & Frankberg, E. (Contact)
Materials Science and Environmental EngineeringFacility/equipment: Facility
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Tampere Microscopy Center
Vippola, M. (Manager), Honkanen, M. (Operator) & Salminen, T. (Operator)
Faculty of Engineering and Natural SciencesFacility/equipment: Facility
Prizes
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Young Researcher award
Frankberg, E. (Recipient), 8 Jun 2021
Prize: Award or honor granted for a specific work
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