Unravelling the structural origin of cyclic fatigue in ferroelectrics

揭示铁电体循环疲劳的结构起源

• 批准号: DP190101155
• 负责人: Prof Xiaozhou Liao
• 金额: $ 28.78万
• 依托单位: The University of Sydney
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2019
• 资助国家: 澳大利亚
• 起止时间: 2019-01-01 至 2024-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP190101155
• 关键词: Unravelling; structural; origin; cyclic; fatigue

Ferroelectric materials have extensive applications in electromechanical devices and memories and in service are often subjected to repeat mechanical and/or electrical loading, leading to cyclic fatigue and failure. This project aims to apply in-situ electron microscopy techniques and computational modelling to explore cyclic ferroelectric fatigue behaviour and to understand the relationships between local atomic scale structure and fatigue. The structural origin of ferroelectric fatigue has not been clear because of the limitations of previous measurement capabilities. This project will provide guidance in materials design to increase ferroelectric fatigue lifetime for more reliable ferroelectric-based electronic devices.

铁电材料在机电设备和存储器中具有广泛的应用，并且在使用中经常经受重复的机械和/或电负载，导致循环疲劳和失效。该项目旨在应用原位电子显微镜技术和计算建模来探索循环铁电疲劳行为，并了解局部原子尺度结构与疲劳之间的关系。由于以往测量能力的限制，铁电疲劳的结构起源尚不清楚。本研究将为提高铁电疲劳寿命的材料设计提供指导，以获得更可靠的铁电基电子器件。