Room-Temperature Plastic Deformation of Strontium Titanate Crystals Grown from Different Chemical Compositions
Oxide materials have the potential to exhibit superior mechanical properties in terms of high yield point, high melting point, and high chemical stability. Despite this, they are not widely used as a structural material due to their brittle nature. However, this study shows enhanced room-temperature...
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MDPI AG
2017-11-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/7/11/351 |
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| author | Atsutomo Nakamura Kensuke Yasufuku Yuho Furushima Kazuaki Toyoura K. Peter D. Lagerlöf Katsuyuki Matsunaga |
| author_facet | Atsutomo Nakamura Kensuke Yasufuku Yuho Furushima Kazuaki Toyoura K. Peter D. Lagerlöf Katsuyuki Matsunaga |
| author_sort | Atsutomo Nakamura |
| collection | DOAJ |
| description | Oxide materials have the potential to exhibit superior mechanical properties in terms of high yield point, high melting point, and high chemical stability. Despite this, they are not widely used as a structural material due to their brittle nature. However, this study shows enhanced room-temperature plasticity of strontium titanate (SrTiO3) crystals through the control of the chemical composition. It is shown that the deformation behavior of SrTiO3 crystals at room temperature depends on the Sr/Ti ratio. It was found that flow stresses in deforming SrTiO3 crystals grown from a powder with the particular ratio of Sr/Ti = 1.04 are almost independent of the strain rate because of the high mobility of dislocations in such crystals. As a result, the SrTiO3 crystals can deform by dislocation slip up to a strain of more than 10%, even at a very high strain rate of 10% per second. It is thus demonstrated that SrTiO3 crystals can exhibit excellent plasticity when chemical composition in the crystal is properly controlled. |
| first_indexed | 2024-04-11T21:49:46Z |
| format | Article |
| id | doaj.art-c92c5c0c04964edcbfbfed5d565af584 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-11T21:49:46Z |
| publishDate | 2017-11-01 |
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| series | Crystals |
| spelling | doaj.art-c92c5c0c04964edcbfbfed5d565af5842022-12-22T04:01:16ZengMDPI AGCrystals2073-43522017-11-0171135110.3390/cryst7110351cryst7110351Room-Temperature Plastic Deformation of Strontium Titanate Crystals Grown from Different Chemical CompositionsAtsutomo Nakamura0Kensuke Yasufuku1Yuho Furushima2Kazuaki Toyoura3K. Peter D. Lagerlöf4Katsuyuki Matsunaga5Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanDepartment of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanDepartment of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanDepartment of Materials Science and Engineering, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, JapanDepartment of Materials Science and Engineering, Case Western Reserve University, Cleveland, OH 44106, USADepartment of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanOxide materials have the potential to exhibit superior mechanical properties in terms of high yield point, high melting point, and high chemical stability. Despite this, they are not widely used as a structural material due to their brittle nature. However, this study shows enhanced room-temperature plasticity of strontium titanate (SrTiO3) crystals through the control of the chemical composition. It is shown that the deformation behavior of SrTiO3 crystals at room temperature depends on the Sr/Ti ratio. It was found that flow stresses in deforming SrTiO3 crystals grown from a powder with the particular ratio of Sr/Ti = 1.04 are almost independent of the strain rate because of the high mobility of dislocations in such crystals. As a result, the SrTiO3 crystals can deform by dislocation slip up to a strain of more than 10%, even at a very high strain rate of 10% per second. It is thus demonstrated that SrTiO3 crystals can exhibit excellent plasticity when chemical composition in the crystal is properly controlled.https://www.mdpi.com/2073-4352/7/11/351strontium titanate (STO)dislocationstransmission electron microscopy (TEM)single crystalsoxides |
| spellingShingle | Atsutomo Nakamura Kensuke Yasufuku Yuho Furushima Kazuaki Toyoura K. Peter D. Lagerlöf Katsuyuki Matsunaga Room-Temperature Plastic Deformation of Strontium Titanate Crystals Grown from Different Chemical Compositions Crystals strontium titanate (STO) dislocations transmission electron microscopy (TEM) single crystals oxides |
| title | Room-Temperature Plastic Deformation of Strontium Titanate Crystals Grown from Different Chemical Compositions |
| title_full | Room-Temperature Plastic Deformation of Strontium Titanate Crystals Grown from Different Chemical Compositions |
| title_fullStr | Room-Temperature Plastic Deformation of Strontium Titanate Crystals Grown from Different Chemical Compositions |
| title_full_unstemmed | Room-Temperature Plastic Deformation of Strontium Titanate Crystals Grown from Different Chemical Compositions |
| title_short | Room-Temperature Plastic Deformation of Strontium Titanate Crystals Grown from Different Chemical Compositions |
| title_sort | room temperature plastic deformation of strontium titanate crystals grown from different chemical compositions |
| topic | strontium titanate (STO) dislocations transmission electron microscopy (TEM) single crystals oxides |
| url | https://www.mdpi.com/2073-4352/7/11/351 |
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