Description
Oxide glasses are an integral part of the modern world, but theirusefulness can be limited by their characteristic brittleness at room
temperature. We show 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 (E.J. Frankberg
et al. Science 2019). Follow up studies confirm that the available
plasticity mechanisms can be scalable to thermodynamic bulk scale
by using microcompression and large scale atomistic simulations.
| Period | 13 Dec 2021 |
|---|---|
| Event title | 14th Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 14) including Glass & Optical Materials Division 2021 Annual Meeting (GOMD 2021) |
| Event type | Conference |
| Location | Vancouver, CanadaShow on map |
| Degree of Recognition | International |