原子尺度的洞察力 以诱导的谷物边界结构修改在Al2O3中
Jingyuan Yan1,2, Tatsuya Yokoi3, Yuuki Nakano3
1Institute of Engineering Innovation, The University of Tokyo, Tokyo, 113-0032, Japan.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 22, 2025
概括
在氧化粒边界中的分离改变了原子结构和密度,最大限度地减少了过剩的体积,从而提高了材料的性能. 这项研究揭示了谷物边界结构转变的原子尺度机制.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 固态物理 固态物理
背景情况:
- 在粒度边界 (GBs) 上的杂质分离显著影响材料特性.
- 了解GB分离的原子尺度机制对于材料设计至关重要.
研究的目的:
- 为了研究 (Y) 分离的GBs在alpha-Al2O3.3中的原子结构.
- 为了阐明由杂质分离引起的GB结构转变的机制.
主要方法:
- 扫描传输电子显微镜 (STEM). 扫描传输电子显微镜.
- 蒙特卡洛 (MC) 和分子动力学 (MD) 模拟.
- 神经网络 (NN) 对模拟的潜力.
主要成果:
- 分离涉及Y的替代Al原子.
- 分离诱导结构适应与改变的GB原子密度.
- 结合环境的变化将多余的体积最小化,从而导致最低能量的结构.
结论:
- 分离驱动GBs的原子层结构转变.
- 这项研究为GB结构变化的原子尺度机制提供了新的见解.
- 这些发现对于通过GB工程来控制材料特性至关重要.
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