Article
Chemistry, Multidisciplinary
Zheyi An, Hiroko Yokota, Kyomaru Kurihara, Nozomu Hasegawa, Pavel Marton, Anthony Michael Glazer, Yoshiaki Uesu, Wei Ren, Zuo-Guang Ye, Marek Pasciak, Nan Zhang
Summary: A tunable polar domain boundary is discovered in an antiferroelectric single crystal, where the density, volume, and polarity of the boundaries can be controlled under a small stress or electric field.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wenjie Li, Weimin Li, Guo Chen, Liyun Wu, Jun Zhang, Ming Chen, Guohua Zhong, Junyi Zhu, Ye Feng, Hao Zeng, Chunlei Yang
Summary: Conducting atomic force microscopy is used to investigate the mechanism behind the lower power conversion efficiency (PCE) of CZTS solar cells compared to CIGS solar cells. The difference in efficiency is attributed to the distinct band alignment at the grain boundaries and grain interior for the two materials. CZTS demonstrates type-I band alignment, leading to enhanced carrier recombination and decreased PCE.
Article
Chemistry, Multidisciplinary
Xinglong Ye, Fengkai Yan, Lukas Schaefer, Di Wang, Holger Gesswein, Wu Wang, Mohammed Reda Chellali, Leigh T. Stephenson, Konstantin Skokov, Oliver Gutfleisch, Dierk Raabe, Horst Hahn, Baptiste Gault, Robert Kruk
Summary: Hydrogen atoms play a critical role in permanent magnets, and engineering grain boundaries can achieve the giant magnetoelectric effect in these magnets.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ksenia Bets, Vasilii Artyukhov, Boris Yakobson
Summary: The study investigates the formation of grain boundaries in graphene through kinetic Monte Carlo simulations and comparison with previous global minimum structures, revealing key parameters influencing lattice structure and conditions resulting in different types of grain boundaries.
Article
Chemistry, Physical
Xin Xu, Connor Carr, Xinqi Chen, Benjamin D. Myers, Ruiyun Huang, Weizi Yuan, Sihyuk Choi, Dezhi Yi, Charudatta Phatak, Sossina M. Haile
Summary: This study reveals the variation in grain boundary properties of polycrystalline ionic materials and the correlation between grain boundary resistance and impurity concentration. The findings suggest that the grain boundary resistance may be caused by impurity-generated space charge effects and driven by the energetics of impurity segregation.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Ceramics
Xin Wang, Xin Ren, Zhuyun Li, Wanli You, Haibo Jiang, Wenqi Yu, Lujiang Jin, Zheng Yao, Liyi Shi
Summary: Magnesium doping has a significant impact on the comprehensive electrical properties of ZnO varistors, improving nonlinearity, decreasing residual voltage ratio, and exhibiting excellent overall electrical performance.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Xianming Yang, Weiguo Wang, Xinfu Gu
Summary: The study found that in BCC metals, grain boundaries with {0 1 1}/{0 1 1} inter-connections have higher forming ability and corrosion resistance, making them suitable as near singular boundaries. This discovery is significant for grain boundary design and control in BCC metals.
PHILOSOPHICAL MAGAZINE
(2022)
Article
Materials Science, Multidisciplinary
Yaodong Xuanyuan, Hongjun Li, Ming Huang, Yinbiao Yan, Sen Yang
Summary: Grain boundary character distribution (GBCD) in TiAl-based alloy was modified through multidirectional isothermal forging (MDIF) combined with annealing, resulting in enhanced room-temperature plasticity. The combination of MDIF and annealing at 1100 degrees C for 90 min promoted the formation of annealing twins and increased the fraction of low-SCSL boundaries, leading to the disruption of random boundary networks and improved plasticity in TiAl-based alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Nannan Chen, Haris Ali Khan, Shenxi Li, Jingjing Li
Summary: This study investigated the mechanisms behind the increased electrical conductivity in pure copper joined with aluminum via micro friction stir blind riveted and post-heating. The increase in E3 boundaries and reduction in random grain boundaries were identified as the main contributing factors. While this grain boundary engineering approach led to improved electrical conductivity, high-temperature heating resulted in a significant reduction in microhardness due to strain relief and grain growth.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Mingyue Wen, Yuan Sun, Jinjiang Yu, Shulin Yang, Xingyu Hou, Yanhong Yang, Xiaofeng Sun, YiZhou Zhou
Summary: By regulating the cooling rates of pre-weld heat treatments, the effects of microstructures of grain boundaries in the prototype M951 superalloy were investigated to improve its weldability and reduce the occurrence of weld cracks. Engineering the grain boundaries in the M951 superalloy with a low cooling rate favored the formation of continuous liquid films on the grain boundaries, significantly preventing the formation of weld cracks.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Hongyi Dou, Markus Hellenbrand, Ming Xiao, Zedong Hu, Sundar Kunwar, Aiping Chen, Judith L. MacManus-Driscoll, Quanxi Jia, Haiyan Wang
Summary: Defect engineering in valence change memories has been extensively studied to tune the concentration and transport of oxygen vacancies. However, most of the focus has been on individual extended defects. This work investigates the impact of engineering large numbers of grain boundaries on resistive switching mechanisms and performances. Three different grain morphologies are realized in CeO2 thin films, and the devices exhibit vastly different resistive switching behaviors. The research provides design guidelines for grain boundary engineering of oxide-based resistive switching materials.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Zhe Cheng, Chiheng Dong, Huan Yang, Qinghua Zhang, Satoshi Awaji, Lin Gu, Hai-Hu Wen, Yanwei Ma
Summary: Researchers have finely tuned the electronic properties of grain boundaries in iron-based superconductors by doping them with different concentrations of a certain element. The study reveals that the contribution of grain boundaries to supercurrent transport is closely related to the doping concentration. The presence of a special structure at the grain boundaries and adjacent grains plays a key role in the transport of supercurrent. This study provides important insights for improving the application performance of iron-based superconductors through grain boundary engineering.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Kunyen Liao, Kiyou Shibata, Teruyasu Mizoguchi
Summary: Grain boundaries significantly affect the coefficient of thermal expansion in polycrystals. This study used EELS to directly measure CTE in different types of grain boundaries, revealing variations in thermodynamic properties and demonstrating the potential of EELS for probing local thermal properties at nanometer-scale resolution.
Article
Nanoscience & Nanotechnology
J. -E. Brandenburg, J. Seo, K. Eto, D. A. Molodov, S. Tsurekawa
Summary: The study used nanoindentation to investigate the local mechanical properties near 1010 tilt grain boundaries in magnesium bicrystals with different misorientation angles. It was found that critical shear-stress for the second pop-in differed substantially for grain boundaries with different structures, indicating important mechanical property variations in these boundaries.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Byeongmin Kang, Yejin Park, Dong Gyu Hwang, Donghwan Kim, Uijung Yong, Khoon S. Lim, Jinah Jang
Summary: Researchers have developed a microscale bioprinting process using light-activated decellularized extracellular matrix-based bioinks. This bioprinting process allows for the production of size-controllable spheroidal and tubular tissue constructs at the microscale without the need for cumbersome post-processing steps. The bioprinted microtissues can support cellular activities and tissue maturation with tissue-specific physiological significance.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
