Title
Micro-scale damage tolerance studies in ferroelectric barium titanate thin films
Conference Dates
October 2 – 7, 2022
Abstract
Barium Titanate (BTO) is a brittle, lead free ferroelectric and piezoelectric ceramic used in the miniature form in microscale electrical device applications as capacitors, actuators and sensors. During service this material system develops mechanical stresses due to thermal and electric loads acting on the system, which leads to the failure of the system due to cracking in the films or interface delamination. Micropillar compression revealed a size effect in strength with a size exponent close to 1 and an enhancement in elastic strain limit [1]. It also revealed strain accommodation by dislocation plasticity. However, signature of plastic deformation in compression (Figure 1a) does not necessarily translate to crack tip plasticity tension for brittle ceramics.
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Recommended Citation
Nidhin George Mathews, Aloshious Lambai, Gaurav Mohanty, Christoph Kirchlechner, N Venkataramani, Gerhard Dehm, and Balila Nagamani Jaya, "Micro-scale damage tolerance studies in ferroelectric barium titanate thin films" in "Nanomechanical Testing in Materials Research and Development VIII", Sandra Korte-Kerzel, RWTH Aachen University, Germany Eds, ECI Symposium Series, (2022). https://dc.engconfintl.org/nanomechtest_viii/100