TY - JOUR
T1 - Superelastic oxide micropillars enabled by surface tension–modulated 90° domain switching with excellent fatigue resistance
AU - Li, Yingwei
AU - Chu, Kangjie
AU - Liu, Chang
AU - Jiang, Peng
AU - Qu, Ke
AU - Gao, Peng
AU - Wang, Jie
AU - Ren, Fuzeng
AU - Sun, Qingping
AU - Chen, Longqing
AU - Li, Jiangyu
N1 - Funding Information:
ACKNOWLEDGMENTS. We acknowledge the support from the National Key Research and Development Program of China (Grant 2016YFA0201001), National Natural Science Foundation of China (Grants 11972262, 11627801, 11672264, 11972320, 52021006, and 11974023), the support of Guangdong Provincial Key Laboratory Program from the Department of Science and Technology of Guangdong Province (Grant 2021B1212040001), the Natural Science Foundation of Hubei Province (Grant 2019CFB486), the Fundamental Research Funds for the Central Universities, the Fundamental Research Program of Shenzhen (Grant JCYJ20170412153039309), and Zhejiang Provincial Natural Science Foundation (Grant LZ17A020001). This work was also supported by the Pico Center at SUSTech that receives support from Presidential fund and Development and Reform Commission of Shenzhen Municipality, the Science, Technology, and Innovation Commission of Shenzhen Municipality (Grant SGDX2019081623360564), the open foundation of Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics (Wuhan University of Technology) (Grant TAM202002).
Publisher Copyright:
© 2021 National Academy of Sciences. All rights reserved.
PY - 2021/6/15
Y1 - 2021/6/15
N2 - Superelastic materials capable of recovering large nonlinear strains are ideal for a variety of applications in morphing structures, reconfigurable systems, and robots. However, making oxide materials superelastic has been a long-standing challenge due to their intrinsic brittleness. Here, we fabricate ferroelectric BaTiO3 (BTO) micropillars that not only are superelastic but also possess excellent fatigue resistance, lasting over 1 million cycles without accumulating residual strains or noticeable variation in stress–strain curves. Phase field simulations reveal that the large recoverable strains of BTO micropillars arise from surface tension–modulated 90° domain switching and thus are size dependent, while the small energy barrier and ultralow energy dissipation are responsible for their unprecedented cyclic stability among superelastic materials. This work demonstrates a general strategy to realize superelastic and fatigue-resistant domain switching in ferroelectric oxides for many potential applications.
AB - Superelastic materials capable of recovering large nonlinear strains are ideal for a variety of applications in morphing structures, reconfigurable systems, and robots. However, making oxide materials superelastic has been a long-standing challenge due to their intrinsic brittleness. Here, we fabricate ferroelectric BaTiO3 (BTO) micropillars that not only are superelastic but also possess excellent fatigue resistance, lasting over 1 million cycles without accumulating residual strains or noticeable variation in stress–strain curves. Phase field simulations reveal that the large recoverable strains of BTO micropillars arise from surface tension–modulated 90° domain switching and thus are size dependent, while the small energy barrier and ultralow energy dissipation are responsible for their unprecedented cyclic stability among superelastic materials. This work demonstrates a general strategy to realize superelastic and fatigue-resistant domain switching in ferroelectric oxides for many potential applications.
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U2 - 10.1073/pnas.2025255118
DO - 10.1073/pnas.2025255118
M3 - Article
C2 - 34117121
AN - SCOPUS:85107968066
SN - 0027-8424
VL - 118
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 24
M1 - e2025255118
ER -