Abstract
Ceramics are generally brittle at ambient condition and they can hardly be deformed plastically. In this study,severe plastic deformation was successfully imposed on barium titanate ceramic powders by high-pressure torsion. A tetragonal-to-cubic phase transformation occurred,and the fraction and stability of the cubic phase increased by straining because of the formation of nanograins. BaTiO 3 exhibited photoluminescence and the yellow intensity increased after straining because of the formation of large fraction of grain boundaries. The dielectric constant of BaTiO 3 was unusually increased by nanograin formation while the Curie temperature remained constant.
| Original language | English |
|---|---|
| Pages (from-to) | 216-221 |
| Number of pages | 6 |
| Journal | Materials Research Letters |
| Volume | 3 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Jul 24 2015 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
Cite this
Plastic deformation of BaTiO 3 ceramics by high-pressure torsion and changes in phase transformations,optical and dielectric properties . / Edalati, Kaveh; Arimura, Masashi; Ikoma, Yoshifumi; Daio, Takeshi; Miyata, Moriji; Smith, David J.; Horita, Zenji.
In: Materials Research Letters, Vol. 3, No. 4, 24.07.2015, p. 216-221.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Plastic deformation of BaTiO 3 ceramics by high-pressure torsion and changes in phase transformations,optical and dielectric properties
AU - Edalati, Kaveh
AU - Arimura, Masashi
AU - Ikoma, Yoshifumi
AU - Daio, Takeshi
AU - Miyata, Moriji
AU - Smith, David J.
AU - Horita, Zenji
PY - 2015/7/24
Y1 - 2015/7/24
N2 - Ceramics are generally brittle at ambient condition and they can hardly be deformed plastically. In this study,severe plastic deformation was successfully imposed on barium titanate ceramic powders by high-pressure torsion. A tetragonal-to-cubic phase transformation occurred,and the fraction and stability of the cubic phase increased by straining because of the formation of nanograins. BaTiO 3 exhibited photoluminescence and the yellow intensity increased after straining because of the formation of large fraction of grain boundaries. The dielectric constant of BaTiO 3 was unusually increased by nanograin formation while the Curie temperature remained constant.
AB - Ceramics are generally brittle at ambient condition and they can hardly be deformed plastically. In this study,severe plastic deformation was successfully imposed on barium titanate ceramic powders by high-pressure torsion. A tetragonal-to-cubic phase transformation occurred,and the fraction and stability of the cubic phase increased by straining because of the formation of nanograins. BaTiO 3 exhibited photoluminescence and the yellow intensity increased after straining because of the formation of large fraction of grain boundaries. The dielectric constant of BaTiO 3 was unusually increased by nanograin formation while the Curie temperature remained constant.
UR - http://www.scopus.com/inward/record.url?scp=84996548652&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84996548652&partnerID=8YFLogxK
U2 - 10.1080/21663831.2015.1065454
DO - 10.1080/21663831.2015.1065454
M3 - Article
AN - SCOPUS:84996548652
VL - 3
SP - 216
EP - 221
JO - Materials Research Letters
JF - Materials Research Letters
SN - 2166-3831
IS - 4
ER -