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Ferroelectric Domains and Mechanical Size Effects in Barium Titanate: Do They Interact?

17 Pages Posted: 30 Oct 2019 First Look: Under Review

See all articles by Nidhin George Mathews

Nidhin George Mathews

Indian Institute of Technology (IIT), Bombay - Department of Metallurgical Engineering and Materials Science

Ashish Kumar Saxena, PhD

Max Planck Institute for Iron Research - Department of Structure and Nano-/Micro-mechanics of Materials

Christoph Kirchlechner, PhD

Max Planck Institute for Iron Research - Department of Structure and Nano-/Micro-mechanics of Materials

Gerhard Dehm, PhD

Max Planck Institute for Iron Research - Department of Structure and Nano-/Micro-mechanics of Materials

Balila Nagamani Jaya, PhD

Indian Institute of Technology (IIT), Bombay - Department of Metallurgical Engineering and Materials Science

Abstract

Microscale mechanical behaviour of single crystalline Barium Titanate (BaTiO3), a ferroelectric ceramic was studied by uniaxial in situ micropillar compression and nanoindentation. It was observed that pillars below 1 μm diameter reached the theoretical strength of BaTiO3 whereas larger pillars yielded at lower stress values with multiple stress drops confirming slip activity. A size scaling exponent of 0.96 ± 0.09 was estimated for BaTiO3 which is close to one of the soft fcc metals. The material's strength, hardness and deformation behaviour did not show any dependence on the character of the ferroelectric domain, within our error bars.

Keywords: Micropillar compression, Plastic deformation, Ferroelectric ceramics, Domains, Perovskite

Suggested Citation

Mathews, Nidhin George and Saxena, Ashish Kumar and Kirchlechner, Christoph and Dehm, Gerhard and Jaya, Balila Nagamani, Ferroelectric Domains and Mechanical Size Effects in Barium Titanate: Do They Interact?. Available at SSRN: https://ssrn.com/abstract=3474466

Nidhin George Mathews (Contact Author)

Indian Institute of Technology (IIT), Bombay - Department of Metallurgical Engineering and Materials Science ( email )

Mumbai, 400076
India

Ashish Kumar Saxena

Max Planck Institute for Iron Research - Department of Structure and Nano-/Micro-mechanics of Materials

Germany

Christoph Kirchlechner

Max Planck Institute for Iron Research - Department of Structure and Nano-/Micro-mechanics of Materials

Germany

Gerhard Dehm

Max Planck Institute for Iron Research - Department of Structure and Nano-/Micro-mechanics of Materials

Germany

Balila Nagamani Jaya

Indian Institute of Technology (IIT), Bombay - Department of Metallurgical Engineering and Materials Science ( email )

Mumbai, 400076
India

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