Highly ductile amorphous oxide at room temperature and high strain rate

Activity: Talk or presentationInvited lecture

Description

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 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.
Period13 Dec 2021
Event title14th Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 14) including Glass & Optical Materials Division 2021 Annual Meeting (GOMD 2021)
Event typeConference
LocationVancouver, Canada
Degree of RecognitionInternational