原子单位
晶界
晶界滑移
微晶
材料科学
变形(气象学)
倾斜(摄像机)
Atom(片上系统)
平面(几何)
凝聚态物理
结晶学
复合材料
化学
冶金
物理
微观结构
几何学
计算机科学
嵌入式系统
量子力学
数学
作者
Lihua Wang,Yin Zhang,Zhi Zeng,Hao Zhou,Jian He,Pan Liu,Mingwei Chen,Jian Han,David J. Srolovitz,Jiao Teng,Yizhong Guo,Guo Yang,Deli Kong,E. Ma,Yongli Hu,Baocai Yin,Xiaoxu Huang,Ze Zhang,Ting Zhu,Xiaodong Han
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2022-03-17
卷期号:375 (6586): 1261-1265
被引量:155
标识
DOI:10.1126/science.abm2612
摘要
Grain boundaries (GBs) play an important role in the mechanical behavior of polycrystalline materials. Despite decades of investigation, the atomic-scale dynamic processes of GB deformation remain elusive, particularly for the GBs in polycrystals, which are commonly of the asymmetric and general type. We conducted an in situ atomic-resolution study to reveal how sliding-dominant deformation is accomplished at general tilt GBs in platinum bicrystals. We observed either direct atomic-scale sliding along the GB or sliding with atom transfer across the boundary plane. The latter sliding process was mediated by movements of disconnections that enabled the transport of GB atoms, leading to a previously unrecognized mode of coupled GB sliding and atomic plane transfer. These results enable an atomic-scale understanding of how general GBs slide in polycrystalline materials.
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