Results 1 to 10 of about 431,575 (349)

Incommensurate grain-boundary atomic structure [PDF]

Nature Communications, 2023
Grain-boundary atomic structures of crystalline materials have long been believed to be commensurate with the crystal periodicity of the adjacent crystals.
Takehito Seki, Toshihiro Futazuka, Nobusato Morishige, Ryo Matsubara, Yuichi Ikuhara, Naoya Shibata   +5 more
doaj   +2 more sources

Grain boundary engineering for efficient and durable electrocatalysis [PDF]

Nature Communications
Grain boundaries in noble metal catalysts have been identified as critical sites for enhancing catalytic activity in electrochemical reactions such as the oxygen reduction reaction.
Xin Geng, Miquel Vega-Paredes, Zhenyu Wang, Colin Ophus, Pengfei Lu, Yan Ma, Siyuan Zhang, Christina Scheu, Christian H. Liebscher, Baptiste Gault   +9 more
doaj   +2 more sources

Dislocation-Grain Boundary Interaction Dataset for FCC Cu [PDF]

Scientific Data
Interactions between dislocations and grain boundaries play a major role in controlling the strength and ductility of structural materials. Experimentally, assessing and probing geometric and stress-based criteria at the local level for dislocation ...
Khanh Dang, Sumit Suresh, Avanish Mishra, Ian Chesser, Nithin Mathew, Edward M. Kober, Saryu Fensin   +6 more
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Strengthening/embrittlement effects induced by segregation of transmutation He and Li at Be {101̄1} grain boundary by first-principles calculations

Nuclear Materials and Energy, 2023
First-principles calculations have been performed to investigate the effect of segregation of transmutation helium and lithium atoms on the strength of beryllium {101̄1} grain boundary.
Yinlong Wang, Canglong Wang, Zhaocang Meng, Yiwen Liu, Yafeng Shu, Yuhong Li   +5 more
doaj   +1 more source

Grain refinement strengthening mechanism of an austenitic stainless steel: critically analyze the impacts of grain interior and grain boundary

Journal of Materials Research and Technology, 2022
In order to probe the superior nano/micron scale mechanical behaviors of ultra-fine grain (UFG) austenitic stainless steel as compared with coarse grain (CG) counterpart, systematic nanoindentation tests were carried out together with post-mortem EBSD ...
Rui Ke, Chengyang Hu, Ming Zhong, Xiangliang Wan, Kaiming Wu   +4 more
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Electron Radiation Effects of Grain-Boundary Evolution on Polycrystalline Silicon in MEMS

Micromachines, 2022
A specimen observed with a transmission electron microscope (TEM) was processed by focused ion beam (FIB) from a surface-micromachined polycrystalline silicon MEMS structure. Electron irradiation and in situ observation were performed on a selected grain
Lei Wang, Haiyun Liu, Xing Liu
doaj   +1 more source

Research progress in grain boundary serration in iron/nickel based austenitic polycrystalline alloys

工程科学学报, 2021
Grain boundaries of high-temperature metallic materials, such as alloys, are often considered weak. At elevated temperatures, the strength of the grain boundary is relatively lower than that of the intragranular areas, and cracks often initially form on ...
Xia ZHAO, Min WANG, Xian-chao HAO, Xiang-dong ZHA, Ming GAO, Ying-che MA, Kui LIU   +6 more
doaj   +1 more source

Grain boundary effects on piezoelectric properties of the core–shell-structured BaTiO3@TiO2 ceramics [PDF]

Journal of Advanced Dielectrics, 2018
Grain boundary effect on BaTiO3 has been widely investigated for several decades. However, all of them tailored the grain boundary by grain size of BaTiO3.
Xixi Li, Zhonghua Yao, Juan Xie, Zongxin Li, Hua Hao, Minghe Cao, Amjad Ullah, Atta Ullah, Abdul Manan, Hanxing Liu   +9 more
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The mechanisms of grain growth of Mg alloys: A review

Journal of Magnesium and Alloys, 2022
Grain growth directly influences the plasticity and strength of Mg alloys. As the grain size decreases from the microscale to the nanoscale, the plasticity of Mg alloys continually increases, whereas the strength first increases and later decreases ...
Qinghua Chen, Ruinan Chen, Jian Su, Qingsong He, Bin Tan, Chao Xu, Xu Huang, Qingwei Dai, Jian Lu   +8 more
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Grain boundary elimination by twinning and dislocation nucleation in front of intergranular crack tips in BCC iron

Materials & Design, 2022
Grain boundary structures with high resistance to intergranular fracture are the target of grain boundary design. In this work, grain boundary elimination in front of crack tip is observed in two special bcc iron bicrystals through molecular dynamics ...
Zhifu Zhao, Babak Safaei, Yanfei Wang, Fulei Chu, Yueguang Wei   +4 more
doaj   +1 more source