Academic literature on the topic 'Ferroelastic'

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Journal articles on the topic "Ferroelastic"

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Skaliukh, Alexander. "Modeling of a hysteretic deformation response in polycrystalline ferroelastics." EPJ Web of Conferences 221 (2019): 01045. http://dx.doi.org/10.1051/epjconf/201922101045.

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You In the absence of an electric field a mathematical model describing the ferroelastic response of complete ferroelectrics ferroelastics on action of mechanical stresses is proposed. The modeling is based on the concept of a “ferroelastic” element, similar to the theory of plasticity where used the Saint-Venant element of “dry friction”. The constitutive relations for elastic and residual strains are constructed. The dependence of elastic compliance on the main values of the tensor of residual strains is established. For residual strains, the constitutive relations are obtained in differentials. The obtained constitutive equations can be used in finite element analysis of irreversible processes of deformation of polycrystalline ferroelastics. A number of numerical experiments were performed, which showed good agreement with the experimental data.
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Ding, Xinkai, and Gaoyang Gou. "Two-dimensional ferroelasticity and ferroelastic strain controllable anisotropic transport properties in CuTe monolayer." Nanoscale 13, no. 45 (2021): 19012–22. http://dx.doi.org/10.1039/d1nr03689k.

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Based on the transverse thermoelectric effect and the domain-wall motion assisted ferroelastic switching, ferroelastic strain controllable transport properties can be achieved in two-dimensional ferroelastic CuTe monolayers.
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Salje, Ekhard K. H. "Ferroelastic Materials." Annual Review of Materials Research 42, no. 1 (August 4, 2012): 265–83. http://dx.doi.org/10.1146/annurev-matsci-070511-155022.

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Muramatsu, Mayu, Tatsuya Kawada, and K. Terada. "A Simulation of Ferroelastic Phase Formation by Using Phase Field Model." Key Engineering Materials 725 (December 2016): 208–13. http://dx.doi.org/10.4028/www.scientific.net/kem.725.208.

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In order to incorporate the mechanical behavior of ferroelastic phase into the stress analysis of solid oxide fuel cell in consideration of elastic, creep, thermal and reduction strains, we propose a mathematical model to predict the formation of ferroelastic phases in crystal grains of La0.6Sr0.4Co0.2Fe0.8O3-δ. The phase field model equipped with the elastic energy is introduced to realize the morphology formation of ferroelastic phases in a crystal grain. By the use of the developed mathematical model, some numerical examples are performed to reproduce the deformation-induced nucleation and growth of ferroelastic phases of La0.6Sr0.4Co0.2Fe0.8O3-δ.
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Рогинский, Е. М., А. С. Крылов, and Ю. Ф. Марков. "Эффекты фазового перехода, индуцированные давлением, в модельных сегнетоэластиках Hg-=SUB=-2-=/SUB=-Br-=SUB=-2-=/SUB=-." Письма в журнал технической физики 44, no. 17 (2018): 3. http://dx.doi.org/10.21883/pjtf.2018.17.46564.17346.

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AbstractRaman spectra of model improper ferroelastics (Hg_2Br_2 crystals) have been analyzed in a wide range of hydrostatic pressures. The baric dependences of the phonon frequencies are obtained. The revealing and anomalous behavior of the soft mode, which is genetically related to the acoustic phonon (ТА_1) at the Brillouin zone boundary (point X ) of the tetragonal phase, are most interesting. The buildup of the second acoustic phonon (ТА_2) from the same point has also been found in the ferroelastic-phase spectra, and its baric behavior has been investigated. The splitting of doubly degenerate phonons of the E _g symmetry has been revealed at fairly high pressures and explained.
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Zhao, Meng-Meng, Lin Zhou, Ping-Ping Shi, Xuan Zheng, Xiao-Gang Chen, Ji-Xing Gao, Fu-Juan Geng, Qiong Ye, and Da-Wei Fu. "Halogen substitution effects on optical and electrical properties in 3D molecular perovskites." Chemical Communications 54, no. 94 (2018): 13275–78. http://dx.doi.org/10.1039/c8cc07052k.

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Xu, Xilong, Yandong Ma, Baibiao Huang, and Ying Dai. "Two-dimensional ferroelastic semiconductors in single-layer indium oxygen halide InOY (Y = Cl/Br)." Physical Chemistry Chemical Physics 21, no. 14 (2019): 7440–46. http://dx.doi.org/10.1039/c9cp00011a.

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Alikin, Denis, Anton Turygin, Andrei Ushakov, Mikhail Kosobokov, Yurij Alikin, Qingyuan Hu, Xin Liu, Zhuo Xu, Xiaoyong Wei, and Vladimir Shur. "Competition between Ferroelectric and Ferroelastic Domain Wall Dynamics during Local Switching in Rhombohedral PMN-PT Single Crystals." Nanomaterials 12, no. 21 (November 6, 2022): 3912. http://dx.doi.org/10.3390/nano12213912.

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The possibility to control the charge, type, and density of domain walls allows properties of ferroelectric materials to be selectively enhanced or reduced. In ferroelectric–ferroelastic materials, two types of domain walls are possible: pure ferroelectric and ferroelastic–ferroelectric. In this paper, we demonstrated a strategy to control the selective ferroelectric or ferroelastic domain wall formation in the (111) single-domain rhombohedral PMN-PT single crystals at the nanoscale by varying the relative humidity level in a scanning probe microscopy chamber. The solution of the corresponding coupled electro-mechanical boundary problem allows explaining observed competition between ferroelastic and ferroelectric domain growth. The reduction in the ferroelastic domain density during local switching at elevated humidity has been attributed to changes in the electric field spatial distribution and screening effectiveness. The established mechanism is important because it reveals a kinetic nature of the final domain patterns in multiaxial materials and thus provides a general pathway to create desirable domain structure in ferroelectric materials for applications in piezoelectric and optical devices.
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Meng, Xin, Zhi-Bo Liu, Ke Xu, Lei He, Yu-Zhen Wang, Ping-Ping Shi, and Qiong Ye. "Metal regulated organic–inorganic hybrid ferroelastic materials: [(CH3)3CN(CH3)2CH2F]2[MBr4] (M = Cd and Zn)." Inorganic Chemistry Frontiers 9, no. 8 (2022): 1603–8. http://dx.doi.org/10.1039/d1qi01533h.

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Two organic–inorganic hybrid compounds [(CH3)3CN(CH3)2CH2F]2[MBr4] (M = Cd and Zn) undergo ferroelastic phase transitions. The substitution of metal center Cd with Zn of inorganic anions regulate the ferroelastic phase transitions.
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Wadhawan, V. K. "Ferroelastic Phase Transitions." Materials Science Forum 3 (January 1985): 91–109. http://dx.doi.org/10.4028/www.scientific.net/msf.3.91.

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Dissertations / Theses on the topic "Ferroelastic"

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Viola, Giuseppe. "Domain switching dynamics in ferroelastic and ferroelastic/ferroelectric perovskites." Thesis, Queen Mary, University of London, 2010. http://qmro.qmul.ac.uk/xmlui/handle/123456789/382.

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A comprehensive study of domain switching process in different ferroelastic and ferroelastic/ferroelectric perovskite structured ceramics has been performed. The effects of thermal fluctuations on domain switching dynamics were investigated in the ferroelastic and in the ferroelectric case under static and dynamic electric and mechanical conditions. In the ferroelastic case, domain switching behaviour was investigated for different compositions, using different types of mechanical tests. Compression tests were carried out to characterize the ferroelastic properties, such as coercive stress, hysteresis loop and irreversible strain. Creep experiments were performed to study the domain switching time dependence at different stress levels. Domain switching kinetics during creep was characterized by implementing a rate model, based on thermal activation rate theory, which allowed the activation volume to be estimated. A Rayleigh-type analysis was performed to study the effects of stress amplitude, loading rate, temperature and composition on ferroelastic switching. Rayleigh-type relationships were proposed to fit the results and the rate model developed was applied to quantify the effect of the loading rate on the Rayleigh loops. Alternative methodologies were developed to assess the effects of rate and temperature on the coercive stress, providing original sets of data. A further application of the rate model provided an estimation of the activation parameters (volume and enthalpy). In PZT 5A at the coercive field the activation volume was calculated to be 2.44 nm3, with a reasonable consistency with the value obtained from creep tests (7.49 nm3). In the ferroelectric case, domain switching was studied by generating P-E and butterfly hysteresis loops and by analysing creep-relaxation curves. In creep experiments, the polarization and the strain were measured simultaneously, during the application of a constant electric field. An insight into the evolution of domain structure and on domain switching mechanisms was gained, highlighting analogies and differences with the ferroelastic case. Experiments at different frequencies, allowed the activation volume to be estimated at the coercive field (77 nm3). The relatively large value indicates small rate dependence and suggests a domain structure with broad and mobile domain walls, being the preferred sites for the nucleation.
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Novak, Jurica. "Simulated mesoscopic structures in a ferroelastic lattice." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621535.

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Garcia, Melendrez Jose Angel. "Ferroelectric and ferroelastic phenomena in PZT thin films." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707904.

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Goncalves, Ferreira Liliana. "Computer simulations of ferroelastic twin walls and defects in perovskite." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611266.

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Rush, Jeremy Richard. "Crystal growth, guest ordering and ferroelastic properties of urea inclusion compounds." Diss., Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/526.

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Imlao, Soodkhet Bond Materials Science &amp Engineering Faculty of Science UNSW. "Ferroelastic domain switching behaviour in lead zirconate titanate under mechanical and electrical loading." Awarded by:University of New South Wales. Materials Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41549.

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In this thesis, ferroelastic domain switching behaviour of lead zirconate titanate ceramics, as used in devices such as actuators, was studied. In particular, the effect of cyclic frequency and amplitude were assessed to develop a correlation between macrostructural changes and fatigue behaviour, both in the bulk and in crack-tip process zones. A variety of experimental methods were used. Raman scattering enabled the poling state of the ceramics can be determined. However, it could not distinguish between the different preferred orientations of in-plane c-domains. Conversely, neutron and X-ray diffraction technique can detect domain orientation distribution and the preferred direction of c-domains. In this study, neutron diffraction was used to probe domain switching behaviour in bulk samples while high spatial resolution X-rays were employed to analyse a switching zone near a crack tip. Under cyclic mechanical loading, domain switching and the accumulation of ferroelastic strain becomes saturated with increasing number of cycles. Moreover, time-dependent deformation was investigated. The results show that a domain forward-switching process occurs during creep deformation while a domain backward-switching process takes place during recovery. In addition, it was found that the frequency of applied stress affects the saturation of the ferroelastic strain while its magnitude has an influence on the level of strain accumulated. Under static mechanical loading, it was found that the size of the crack-tip zone where stress-induced domain switching occurs with increase in the stress intensity factor but the degree of domain switching around the crack tip changes only slightly. Under cyclic electrical loading, the results present a strong link between the frequency of the applied field, remnant polarisation, domain switching and the resultant crack growth. The results show that polarisation fatigue, the size of the switching zone, and the crack growth rate is greater at lower loading frequency. The quantitative analysis of the time dependent mechanism as well as the effect of loading frequency and amplitude on domain switching was achieved by applying viscoelastic models. Importantly, these models can be used to explain domain switching behaviour and domain wall movement under cyclic loading and link these processes to macroscopic deformation.
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Poquette, Ben David. "Understanding Ferroelastic Domain Reorientation as a Damping Mechanism in Ferroelectric Reinforced Metal Matrix Composites." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/29169.

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Ferroelectric-reinforced metal matrix composites (FR-MMCs) offer the potential to improve damping characteristics of structural materials. Many structural materials are valued based on their stiffness and strength; however, stiff materials typically have limited inherent ability to dampen mechanical or acoustic vibrations. The addition of ferroelectric ceramic particles may also augment the strength of the matrix, creating a multifunctional composite. The damping behavior of two FR-MMC systems has been examined. One involved the incorporation of barium titanate (BaTiO3) particles into a Cu- 10w%Sn (bearing bronze) matrix and the other incorporating them into an electroformed Ni matrix. Here the damping properties of the resulting ferroelectric reinforced metal matrix composites (FR-MMCs) have been investigated versus frequency, temperature (above and below the Curie temperature of the reinforcement), and number of strain cycles. FR-MMCs currently represent a material system capable of exhibiting increased damping ability, as compared to the structural metal matrix alone. Dynamic mechanical analysis and neutron diffraction have shown that much of this added damping ability can be attributed to the ferroelectric/ferroelastic nature of the reinforcement.
Ph. D.
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Asare, Ted Ankomahene. "Investigating Ferroelastic and Piezoelectric Vibration Damping Behavior in Nickel-Barium Titanate and Nickel-PZT Composites." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/29208.

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Ferroelectric and piezoelectric ceramic reinforced metal matrix composites are new materials being explored for vibration damping purposes. The high damping ability of ferroelectric and piezoelectric ceramics such as barium titanate (BaTiO3) and lead zirconate titanate (PZT) is due to the anelastic response of ferroelastic domain walls to applied external stress. In piezoelectric ceramics, vibration energy can also be dissipated through the direct piezoelectric effect if the appropriate electric circuit is connected across the ceramic. In this work we have examined the vibration damping behavior of BaTiO3, nickel-barium titanate (Ni-BaTiO3) composites and nickel-lead zirconate titanate (Ni-PZT) composites. BaTiO3 ceramics were fabricated by a combination of uniaxial pressing and cold isostatic pressing followed by sintering in air. Low frequency (0.1Hz-10Hz) damping capacity of BaTiO3, tanδ has been measured in three-point bend configuration on a dynamic mechanical analyzer. Tanδ has been found to increase with temperature up to the Curie temperature (Tc) of BaTiO3, after which there was a drop in damping capacity values due to the disappearance of ferroelectric domains above Tc. Furthermore within the frequency range tested, tanδ has been found to decrease with increasing vibration frequency. We also observed that tanδ decays with the number of vibration cycles (N). The decrease in tanδ with N, however, is fully recovered if BaTiO3 is heated above the Tc. Ni-BaTiO3 composite composed of a layer of BaTiO3 ceramic sandwiched between two layers of Ni were fabricated using a combination of electroless plating and electroforming. The damping behavior of the composite was analyzed in terms of the damping mechanisms below Tc and the damping mechanisms above Tc of BaTiO3. Below Tc, vibration damping ability of the composite was highly influenced by ferroelastic damping in the BaTiO3 component. Above the Curie temperature, the damping capacity was influence more by the inherent damping mechanisms in the nickel matrix. The damping mechanisms in Ni-PZT composites were evaluated at a low vibration frequency of 1Hz. In these composites we identified ferroelastic domain wall motion as the main damping mechanism active below the Tc of PZT. Using a poled PZT ceramic enhanced the damping capacity of the composite because of favorable ferroelastic domain orientation in the direction of applied stress. Based on our experimental results, we found no evidence of a direct piezoelectric damping mechanism in the Ni-PZT composites.
Ph. D.
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Bromberek, Marek. "Elastic properties of ferroelastic LiKSO¦4 in the temperature range from 20 K to 150 K." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ66748.pdf.

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Schultheiß, Jan Erich [Verfasser], Jurij [Akademischer Betreuer] Koruza, and Donner [Akademischer Betreuer] Wolfgang. "Polarization reversal dynamics in polycrystalline ferroelectric/ferroelastic ceramic materials / Jan Erich Schultheiß ; Jurij Koruza, Donner Wolfgang." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2018. http://d-nb.info/116792634X/34.

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Books on the topic "Ferroelastic"

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Phase transitions in ferroelastic and co-elastic crystals: An introduction for mineralogists, material scientists, and physicists. Cambridge [England]: Cambridge University Press, 1990.

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Salje, Ekhard K. H. Phase transitions in ferroelastic and co-elastic crystals: An introduction for mineralogists, material scientists, and physicists. Cambridge [England]: Cambridge University Press, 1993.

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Nechaev, Vladimir, Andrey Shuba, Stanislav Gridnev, and Vitaliy Topolov. Dimensional effects in phase transitions and physical properties of ferroics. ru: INFRA-M Academic Publishing LLC., 2022. http://dx.doi.org/10.12737/1898400.

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The monograph presents mathematical methods and a set of mathematical models describing, within the framework of phenomenological theory, phase transitions in 0D-. 1D-, 2D-, 3D-dimensional ferroelectrics, ferroelastics, ferromagnets and their static and dynamic physical properties near the phase transition point. The influence of the parameters characterizing the ferroic sample and its interaction with the environment on the features of the phase transition, phase transition temperature shift, heat capacity, generalized susceptibilities is analyzed. Mathematical models of multilayer thin-film structures and composite materials, where one of the components is a ferroic nanoparticle, are considered. In general, modern ideas about dimensional effects in ferroelectrics, ferroelastics, ferromagnets and mechanisms of purposeful influence on their properties are sufficiently fully covered. It is intended for researchers, students and postgraduates of physical specialties of universities interested in fundamental problems of formation of physical properties of low-dimensional materials. Research engineers, developers of new materials can use the presented material as a scientific and methodological basis to support the development of optimal solutions for their creation.
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Salje, E. K. Phase Transitions in Ferroelastic and Co-elastic Crystals. Cambridge University Press, 1993.

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Salje, E. K. Phase Transitions in Ferroelastic and Co-Elastic Crystals. Cambridge University Press, 2011.

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Salje, E. K. Phase Transitions in Ferroelastic and Co-Elastic Crystals. Cambridge University Press, 2012.

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Ishibashi, Y. Domain Structures in Ferroelectrics, Ferroelastics, and other Ferroic Materials (Ferroelectrics,). Routledge, 1989.

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Book chapters on the topic "Ferroelastic"

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Fett, T. "Ferroelastic Characterization of Piezoelectrics." In Piezoelectricity, 457–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-68683-5_20.

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Tückmantel, Philippe. "Crossings of Ferroelastic Twin Domains." In Scanning Probe Studies of Structural and Functional Properties of Ferroelectric Domains and Domain Walls, 93–114. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72389-7_7.

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Lloveras, Pol, Teresa Castán, Antoni Planes, and Avadh Saxena. "Precursor Nanoscale Textures in Ferroelastic Martensites." In Disorder and Strain-Induced Complexity in Functional Materials, 227–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20943-7_12.

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Landis, Chad M. "Modeling of Fracture in Ferroelastic Ceramics." In Fracture Mechanics of Ceramics, 471–84. Boston, MA: Springer US, 2005. http://dx.doi.org/10.1007/978-0-387-28920-5_37.

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Lookman, Turab, Marcel Porta, and Avadh Saxena. "Strain Heterogeneity and Ferroelastic Interfaces in Materials." In ICOMAT, 376–81. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118803592.ch55.

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Bhalla, Amar S., Gargi Raina, and Shiv K. Sharma. "Atomic Force Microscope Study of Ferroelastic Domains." In Atomic Force Microscopy/Scanning Tunneling Microscopy, 189–94. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4757-9322-2_19.

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Novak, Jurica, and Ekhard K. H. Salje. "Mesoscopic Scale Structures of a Ferroelastic Domain Wall." In High-Temperature Superconductors and Novel Inorganic Materials, 263–70. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4732-3_45.

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Salje, E. K. H., O. Aktas, and X. Ding. "Functional Topologies in (Multi-) Ferroics: The Ferroelastic Template." In Topological Structures in Ferroic Materials, 83–101. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-25301-5_4.

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Salje, E. K. H. "Fast Ionic Transport Along Twin Walls in Ferroelastic Minerals." In Properties of Complex Inorganic Solids 2, 3–15. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-1205-9_1.

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Salje, Ekhard K. H. "3. Mesoscopic Twin Patterns in Ferroelastic and Co-Elastic Minerals." In Transformation Processes in Minerals, edited by Simon A. Redfern and Michael A. Carpenter, 65–84. Berlin, Boston: De Gruyter, 2000. http://dx.doi.org/10.1515/9781501509155-004.

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Conference papers on the topic "Ferroelastic"

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Meek, S. W., and B. A. Auld. "A Tunable Active Optical Ferroelastic Grating." In Sixth IEEE International Symposium on Applications of Ferroelectrics. IEEE, 1986. http://dx.doi.org/10.1109/isaf.1986.201099.

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Landis, Chad M. "Nonlinear fracture mechanics for ferroelastic materials." In Smart Structures and Materials, edited by Dimitris C. Lagoudas. SPIE, 2004. http://dx.doi.org/10.1117/12.539829.

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Jardine, A. Peter, and John S. Madsen. "Fabrication of "smart" ferroelastic-ferroelectric heterostructures." In 1993 North American Conference on Smart Structures and Materials, edited by Vijay K. Varadan. SPIE, 1993. http://dx.doi.org/10.1117/12.148495.

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Narayanan, V., X. Lu, and S. Hanagud. "A Domain Evolution Model for the Ferroelastic Hysteresis of Piezoceramic Materials." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42768.

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In this paper, we model the thermo-ferroelastic hysteresis phenomena under large mechanical loading by using internal state variables that are associated with a statistical description of microstructural domain characterization. This work is to extend our previous work [1, 2] to include the ferroelastic effects. Under large mechanical loading, the total bulk strain includes the mechanical strain and the bulk piezoelectric strain. The piezoelectric strain is the accompanying strain with the evolution of the domain network, which is described by a domain orientation distribution function. In ferroelastic hysteresis, the domain evolution, which is mainly contributed by 90° domain switching, is delineated by the evolution of the associated domain distribution function and further simplified by the evolution of the associated internal state variables that are the parameters of the domain distribution function. For the mechanical field, the mechanical strain is divided into two parts- the elastic strain and the inelastic strain. The inelastic strain is the corresponding internal variable to describe the inelastic behavior under large mechanical loading. Therefore, the remnant strain contains two parts: the remnant piezoelectric strain and remnant inelastic strain. The dissipation and the associated temperature increase per unit cycle in the ferroelastic hysteresis are studied.
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Hwang, Stephen C., and Robert M. McMeeking. "Finite element model of ferroelectric/ferroelastic polycrystals." In SPIE's 7th Annual International Symposium on Smart Structures and Materials, edited by Christopher S. Lynch. SPIE, 2000. http://dx.doi.org/10.1117/12.388224.

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Yalcinkaya, Yenal, Stefan Weber, and Hans-Jürgen Butt. "Tracking Ferroelastic Twin Domains in MAPbI3 Structure." In nanoGe Fall Meeting 2021. València: Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.nfm.2021.180.

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Elhadrouz, Mourad, Tarak Ben Zineb, and Etienne Patoor. "Micromechanical model for ferroelectric and ferroelastic single crystals." In Smart Structures and Materials, edited by Dimitris C. Lagoudas. SPIE, 2004. http://dx.doi.org/10.1117/12.539133.

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Ikeda, Tadashige. "Modeling of ferroelastic behavior of shape-memory alloys." In Smart Structures and Materials, edited by Ralph C. Smith. SPIE, 2005. http://dx.doi.org/10.1117/12.598693.

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Drozdowski, Miroslaw. "Study of ferroelastic domains in LiKSO4 single crystals." In Solid State Crystals: Materials Science and Applications, edited by Jozef Zmija. SPIE, 1995. http://dx.doi.org/10.1117/12.224969.

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Chen, Wei, Christopher S. Lynch, and Doru Lupascu. "A Method for Measuring Short Crack R-Curve Behavior of Ferroelectric Ceramic." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0535.

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Abstract This work describes a method for measurement of R-curve behavior in ferroelectric ceramics using four point bending specimens with a controlled surface crack. A short surface crack is produced by a Knoop indentation and the damage zone is polished away. The results are compared for two compositions of lead lanthanum zirconate titanate (PLZT), an elastio-plastic ferroelectric composition and a linear elastic electrostrictive composition. R-curves are measured in the crack length regime of 0.1 to 0.8 mm. The ferroelastic composition displays a toughness increase from 0.7 to 1.4 MPam. The linear elastic composition displays a constant toughness of between 0.6 and 0.7 MPa√m. The R-curve behavior of PLZT 8/65/35 is attributed to ferroelastic toughening.
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Reports on the topic "Ferroelastic"

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Sayir, A. Multifunctional Structural Ceramics with Ferroelastic and Martensitic Transformations. Fort Belvoir, VA: Defense Technical Information Center, August 2004. http://dx.doi.org/10.21236/ada450941.

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Ball, Brian L., Ralph C. Smith, Sang-Joo Kim, and Stefan Seelecke. A Ferroelastic Switching Model for Lead Zirconate-Titanate (PZT). Fort Belvoir, VA: Defense Technical Information Center, January 2005. http://dx.doi.org/10.21236/ada440134.

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Matsumoto, Roger L., and Robert J. Mayhew. High Temperature Evaluation of New Ferroelastic Toughened Ceramic Materials. Fort Belvoir, VA: Defense Technical Information Center, February 1988. http://dx.doi.org/10.21236/ada203197.

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Hatch, D. M., A. Saxena, and G. R. Barsch. Landau-Ginzburg model of interphase boundaries in CsCl-type ferroelastics due to M{sup -}{sub 5} mode instability: LaAg{sub 1-x}In{sub x}. Office of Scientific and Technical Information (OSTI), July 1995. http://dx.doi.org/10.2172/88653.

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