Effect of Grain Geometry on the Stability of Polycrystalline Pt at the Nanoscale
收藏中国科学院兰州化学物理研究所科学数据中心2025-12-18 更新2026-01-10 收录
下载链接：
https://ggjsfwdata.licp.cn/dataDetails/b76b877aa1894199b97b2e353c8c04ea
下载链接
链接失效反馈官方服务：
资源简介：
Kelvin polycrystals with geometrical packing of tetrakaidecahedra grains were regarded as the only
possible stable polycrystalline structures in solids. By intensive plastic straining of Pt, we identified the
existence of Kelvin polycrystals with 4 nm grains and Schwarz crystals of 2–3 nm in size connected by
minimal-surface grain boundaries, both constrained by twins. We found Schwarz crystals remained stable
up to 1923 K,nearly 94% of the melting point of Pt, well above the stability limit of the Kelvin polycrystals
(1373 K). It means geometries of grains and their boundary networks play a crucial role in stabilizing
polycrystalline face-centered-cubic metals at the nanoscale.
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：
2025-12-18
