Kinetics of ferroelastic domain switching with and without back-switching events: A phase-field study

IF 8.3 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Avisor Bhattacharya, Mohsen Asle Zaeem
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Abstract

Incomplete domain switching in ferroic materials under external stimuli occurs frequently and it significantly affects their performance. In this study, we perform phase-field simulations of ferroelastic domain switching in yttria-stabilized zirconia to investigate the kinetics of domain switching. For a wide range of applied loads, the kinetics of domain switching follows the Kolmogorov-Avrami-Ishibashi (KAI) model. The domain wall velocity remains constant under a constant load but accelerates when the load is gradually increased over time. The steady movement of domain wall is observed to dominate the kinetics of ferroelastic domain switching. The present study reveals that during switching, some degree of back-switching simultaneously may occur depending upon the applied load and microstructures. Also, sharp corners on domain walls intensify the switching activity, and they often promote back-switching during loading, leading to incomplete domain switching. Increase in back-switching is subsequently followed by another re-switching event that ultimately results in a large deviation from KAI model and a greater absorption of applied deformation.

Abstract Image

Abstract Image

有和没有反向开关事件的铁弹性畴切换动力学:相场研究
铁材料在外界刺激下经常发生不完全畴切换现象,严重影响其性能。在这项研究中,我们对氧化钇稳定氧化锆的铁弹性畴切换进行了相场模拟,以研究畴切换的动力学。对于大范围的施加载荷,畴切换动力学遵循Kolmogorov-Avrami-Ishibashi (KAI)模型。在恒定载荷下,畴壁速度保持恒定,但随着时间的推移,载荷逐渐增加,畴壁速度加速。畴壁的稳定运动主导了铁弹性畴切换动力学。本研究表明,在开关过程中,根据外加载荷和微观结构的不同,可能同时发生一定程度的反向开关。此外,区域壁上的尖角加剧了切换活动,并且在加载过程中经常促进反向切换,导致区域切换不完全。反向开关的增加随后伴随着另一次重新开关事件,最终导致与KAI模型的大偏差和对施加变形的更大吸收。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Acta Materialia
Acta Materialia 工程技术-材料科学:综合
CiteScore
16.10
自引率
8.50%
发文量
801
审稿时长
53 days
期刊介绍: Acta Materialia serves as a platform for publishing full-length, original papers and commissioned overviews that contribute to a profound understanding of the correlation between the processing, structure, and properties of inorganic materials. The journal seeks papers with high impact potential or those that significantly propel the field forward. The scope includes the atomic and molecular arrangements, chemical and electronic structures, and microstructure of materials, focusing on their mechanical or functional behavior across all length scales, including nanostructures.
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