Effect of size and domain orientation on strength of Barium Titanate

Nidhin George Mathews; Ashish Kumar Saxena; Christoph Kirchlechner; Gerhard Dehm; Balila Nagamani Jaya

doi:10.1016/j.scriptamat.2020.02.039

Effect of size and domain orientation on strength of Barium Titanate

Nidhin George Mathews
, Ashish Kumar Saxena
, Christoph Kirchlechner
, Gerhard Dehm
, Balila Nagamani Jaya^*

^*Corresponding author for this work

Not published at VTT

Indian Institute of Technology Bombay
Max-Planck-Institute for Sustainable Materials
Karlsruhe Institute of Technology (KIT)

Research output: Contribution to journal › Article › Scientific › peer-review

22 Citations (Scopus)

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.

Original language	English
Pages (from-to)	68-73
Number of pages	6
Journal	Scripta Materialia
Volume	182
DOIs	https://doi.org/10.1016/j.scriptamat.2020.02.039
Publication status	Published - Jun 2020
MoE publication type	A1 Journal article-refereed

Funding

The authors would like to thank the Max Planck Society ( 17MAX001 ) for financial support, and facilities at IIT Bombay: Department of Science and Technology (DST) – Fund for Improvement in Science and Technology (FIST) for FIB; National Facility for Texture and Orientation Imaging Microscopy (OIM) for TKD; Central Facilities for Conductive AFM (PFM) and Nanoindenter.

Keywords

Micropillar compression
Plastic deformation
Ferroelectric ceramics
Domains
Perovskite

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title = "Effect of size and domain orientation on strength of Barium Titanate",

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",

author = "Mathews, \{Nidhin George\} and Saxena, \{Ashish Kumar\} and Christoph Kirchlechner and Gerhard Dehm and Jaya, \{Balila Nagamani\}",

year = "2020",

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doi = "10.1016/j.scriptamat.2020.02.039",

language = "English",

volume = "182",

pages = "68--73",

journal = "Scripta Materialia",

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T1 - Effect of size and domain orientation on strength of Barium Titanate

AU - Mathews, Nidhin George

AU - Saxena, Ashish Kumar

AU - Kirchlechner, Christoph

AU - Dehm, Gerhard

AU - Jaya, Balila Nagamani

PY - 2020/6

Y1 - 2020/6

N2 - 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.

AB - 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.

KW - Micropillar compression

KW - Plastic deformation

KW - Ferroelectric ceramics

KW - Domains

KW - Perovskite

UR - https://www.scopus.com/pages/publications/85081018644

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DO - 10.1016/j.scriptamat.2020.02.039

M3 - Article

SN - 1359-6462

VL - 182

SP - 68

EP - 73

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Effect of size and domain orientation on strength of Barium Titanate

Abstract

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Keywords

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