铁弹性增强复合材料中与温度有关的阻尼机制

IF 2.7 3区 物理与天体物理 Q2 PHYSICS, APPLIED Journal of Applied Physics Pub Date : 2024-08-02 DOI:10.1063/5.0218133
Wenting Xiang, Min Tang, Wenhui Zhu, Jingheng Chai, Qi Wu, Zihan Zhang, Xiaoxu Guo, Zheng Yang, Yongke Yan, Liwei D. Geng
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引用次数: 0

摘要

为了揭示在 BaTiO3 增强复合材料中观察到的阻尼容量峰值背后的基本机制,我们对绝缘和导电两种情况都进行了相场建模和计算机模拟。模拟得到的阻尼容量曲线随温度变化,在两种情况下都显示出接近 Tc 的双峰值。第一个峰值(标为峰值 I)出现在 Tc 以下,归因于温度引起的畴重新定向。第二个峰值(标为峰值 II)出现在 Tc 以上,是应力引起的副弹性态与铁弹性态之间的相变。这种转变导致了双环应变-应力滞后,类似于在铁电系统中观察到的 Tc 及以上的极化-场滞后。在峰值 I 和峰值 II 之间,由于 BaTiO3 粒子在临界温度附近的铁弹性减弱,阻尼能力在 Tc 以下出现下降。在复合材料中,由于 Tc 具有异质性,受到提高或降低 Tc 的各种因素的影响,双峰合并为单峰。这种趋同与实验观察结果一致。
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Temperature-dependent damping mechanism in ferroelastic-reinforced composites
Phase field modeling and computer simulations were conducted to uncover the fundamental mechanism behind the peak in damping capacity observed in BaTiO3-reinforced composites, considering both insulating and conductive cases. The damping capacity curve obtained from these simulations, which varies with temperature, reveals dual peaks near Tc for both cases. The first peak, labeled Peak I, occurs below Tc and is attributed to temperature-induced domain reorientation. The second peak, labeled Peak II, occurs above Tc and arises from stress-induced phase transitions between paraelastic and ferroelastic states. This transition results in a double-loop strain–stress hysteresis, akin to the polarization-field hysteresis observed in ferroelectric systems at and above Tc. Between Peak I and Peak II, there is a dip in damping capacity just below Tc, caused by the diminished ferroelasticity of BaTiO3 particles near this critical temperature. In composite materials, the dual peaks merge into a single peak due to the heterogeneous nature of Tc, influenced by various factors that either raise or lower Tc. This convergence aligns with experimental observations.
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来源期刊
Journal of Applied Physics
Journal of Applied Physics 物理-物理:应用
CiteScore
5.40
自引率
9.40%
发文量
1534
审稿时长
2.3 months
期刊介绍: The Journal of Applied Physics (JAP) is an influential international journal publishing significant new experimental and theoretical results of applied physics research. Topics covered in JAP are diverse and reflect the most current applied physics research, including: Dielectrics, ferroelectrics, and multiferroics- Electrical discharges, plasmas, and plasma-surface interactions- Emerging, interdisciplinary, and other fields of applied physics- Magnetism, spintronics, and superconductivity- Organic-Inorganic systems, including organic electronics- Photonics, plasmonics, photovoltaics, lasers, optical materials, and phenomena- Physics of devices and sensors- Physics of materials, including electrical, thermal, mechanical and other properties- Physics of matter under extreme conditions- Physics of nanoscale and low-dimensional systems, including atomic and quantum phenomena- Physics of semiconductors- Soft matter, fluids, and biophysics- Thin films, interfaces, and surfaces
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