Direct atomic observation of large-angle lattice rotation in Cu3Pd
收藏中国科学院兰州化学物理研究所科学数据中心2025-12-19 更新2026-01-10 收录
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资源简介：
Grain rotation plays a critical role in grain growth of nanocrystalline materials, yet the underlying atomic-scale mechanisms, especially for large-angle rotation, remain poorly understood. Here, we report a 62.4◦ lattice
rotation in Cu3Pd nanocrystals by in-situ atomic resolution transmission electron microscopy (TEM) images. This rotation proceeds via a sequential two-step mechanism: double-shear-driven structural transition followed by
atomic shuffling. The large-angle rotation suggests a potential coalescence between adjacent grains and provides an atomic-scale explanation for abnormal grain growth in intermetallic nanocrystals. These experiments establish a novel shear-shuffle paradigm for grain rotation, offering a new framework for understanding the structural evolution and nanocrystal coalescence.
提供机构：
中国科学院兰州化学物理研究所科学数据中心
创建时间：
2025-12-19
