TY - JOUR
T1 - Highly ductile amorphous oxide at room temperature and high strain rate
AU - Frankberg, Erkka J.
AU - Kalikka, Janne
AU - Ferré, Francisco García
AU - Joly-Pottuz, Lucile
AU - Salminen, Turkka
AU - Hintikka, Jouko
AU - Hokka, Mikko
AU - Koneti, Siddardha
AU - Douillard, Thierry
AU - Le Saint, Bérangère
AU - Kreiml, Patrice
AU - Cordill, Megan J.
AU - Epicier, Thierry
AU - Stauffer, Douglas
AU - Vanazzi, Matteo
AU - Roiban, Lucian
AU - Akola, Jaakko
AU - Fonzo, Fabio Di
AU - Levänen, Erkki
AU - Masenelli-Varlot, Karine
N1 - Funding Information:
We thank A.T. Frankberg for making this study possible. In addition, we acknowledge E. Calvi?, I. Issa, D. Krstic, J. Chevalier, J. Juuti, and R. Nowak for supporting the work. Simulation coordinates of a-SiO2 structure are shown in fig. S18 by courtesy of M. Murakami et al. (30). We thank Tampere University graduate school, Tutkijat maailmalle mobility grant by Technology Industries of Finland Centennial Foundation, Tampere University of Technology strategic research funding, Consortium Lyon Saint-Etienne de Microscopie (CLYM), CNRS-CEA ?METSA? French network (FR CNRS 3507) on the platform CLYM, CSC ? IT Center for Science, Jenny and Antti Wihuri Foundation, Academy of Finland (grant no. 315451), Italian National Agency for New Technologies, Energy and Sustainable Economic Development, and Technoprobe SpA for providing the resources to perform the experimental and computational research. This project has received funding from the European Union?s Horizon 2020 research and innovation program (grant agreement nos. 841527, 754586, 755269, and 740415). This work made use of Tampere Microscopy Center facilities at Tampere University.
Publisher Copyright:
Copyright © 2019 The Authors,
PY - 2019/11/15
Y1 - 2019/11/15
N2 - 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.
AB - 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.
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U2 - 10.1126/science.aav1254
DO - 10.1126/science.aav1254
M3 - Article
C2 - 31727833
AN - SCOPUS:85075053772
VL - 366
SP - 864
EP - 869
JO - Science
JF - Science
SN - 0036-8075
IS - 6467
ER -