High temperature stiffening of ferroelastic LaCoO3 |
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| Affiliation: | 1. Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, USA;2. Institute for Problems of Materials Science, NAS of Ukraine, Kiev, Ukraine;3. School of Engineering and Materials Science, Queen Mary University of London, London, UK;4. Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600, Duebendorf, Switzerland;1. Microelectronics research unit, University of Oulu, P.O.Box 4500, FI-90014, Finland;2. Nokia Oyj. / Oulu, Kaapelitie 4, 90650, Oulu, Finland;1. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. Department of Physics, University of Science and Technology of China, Hefei 230026, PR China;1. School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea;2. UNIST Central Research Facilities, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea;3. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea;4. Department of Materials Science and Engineering, Sun Moon University, Asan 31460, Republic of Korea;5. iBULe Photonics, Inc., 7-39, Songdo-dong, Yeonsu-gu, Incheon 21999, Republic of Korea;1. R & D Division, Todakogyo Corporation, 1-4 Meijishinkai, Otake, Hiroshima 739-0652, Japan;2. R & D Division, BASF TODA Battery Materials LLC, 1-1-1 Shinoki, Sanyoonoda, Yamaguchi 756-0847, Japan;3. R & D Division, Todakogyo Corporation, 1-1-1 Shinoki, Sanyoonoda, Yamaguchi 756-0847, Japan;4. Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama, Kanagawa 226-8502, Japan;5. Department of Physical Science, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan;1. Institute of Advanced Ceramics, Hamburg University of Technology, Denickestrasse 15, 21073, Hamburg, Germany;2. Institute of Optical and Electronic Materials, Hamburg University of Technology, Eissendorfer Strasse 38, 21073, Hamburg, Germany;3. Department of Materials Science, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK;4. ITMO University, 49 Kronverkskii Ave., 197101, St. Petersburg, Russia |
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| Abstract: | The cyclic ferroelastic hysteretic behavior of pure LaCoO3 perovskite ceramic has been studied at different temperatures in four point bending. The stress-strain deformation behavior of LaCoO3 was analyzed both in the term of the maximum stress in the cycle and in terms of the temperature used when the cyclic testing was performed. The characteristics of the stress-strain hysteresis loops, such as hysteresis loop area and irreversible strain, as well as effective Young’s modulus, were analyzed, and it was established that both the loading and the temperature history have a significant influence on the mechanical behavior of LaCoO3. Young’s modulus values are reported to be much higher in the 700–900 °C temperature range as compared to the measurements performed in the RT-400 °C temperature range. |
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| Keywords: | Young’s modulus High temperature Ferroelasticity Hysteresis |
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