Article
Mechanics
Saeid Hosseinpour Dashatan, Levend Parnas, Demirkan Coker, Mirac Onur Bozkurt, Emine Burcin Ozen
Summary: In this study, the dynamic delamination behavior in asymmetric GFRP tapered laminates under quasi-static tensile loading is investigated. Abaqus/Explicit cohesive interface modeling is used for simulating delamination initiation and dynamic propagation. The observed results confirm that the ply drop-off type has a significant influence on the strength and delamination behavior of the tapered beam.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Maanas Togaru, Rajat Sainju, Lichun Zhang, Weilin Jiang, Yuanyuan Zhu
Summary: This study used in situ environmental transmission electron microscopy (ETEM) to investigate the thermal oxidation of pristine and self-ion irradiated polycrystalline tungsten for the first time. Two distinctive tungsten oxide microstructures were observed, showing sensitivity to tungsten surface orientation and dynamic changes during oxidation. The study highlights the importance of surface orientation in influencing the microstructure and oxidation kinetics of tungsten oxide scales.
MATERIALS CHARACTERIZATION
(2021)
Article
Multidisciplinary Sciences
Quentin Stern, Samuel Francois Cousin, Frederic Mentink-Vigier, Arthur Cesar Pinon, Stuart James Elliott, Olivier Cala, Sami Jannin
Summary: Dynamic nuclear polarization is a widely used tool for enhancing the sensitivity of nuclear magnetic resonance spectroscopy and imaging, but its practical applicability is limited by the spin diffusion barrier, which hinders efficient polarization transfer between highly polarized nuclei and bulk nuclei.
Article
Engineering, Electrical & Electronic
Alize Vaihiria Gaumet, Richard J. Ball, Alain Nogaret
Summary: The study introduces the synthesis and testing of miniature sensors for structural health monitoring, capable of detecting strain relaxation events and providing early warning of plastic deformation in materials. The sensors are made of thin composite films of polydimethylsiloxane and graphite nanoparticles that conduct via tunneling percolation, showing high sensitivity to deformation.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Review
Materials Science, Multidisciplinary
Yanzheng He, Sisi Liu, Mengfan Wang, Qiyang Cheng, Haoqing Ji, Tao Qian, Chenglin Yan
Summary: Gas-involved electrochemical reactions offer viable solutions to the global energy crisis and environmental pollution. In situ techniques have gained significant attention as judicious tools for real-time monitoring of the variations in catalysts, intermediates, and products during the reaction process, providing insights into reaction mechanisms, material structures, and active sites. This review highlights the recent progress of various advanced in situ characterization techniques, such as in situ X-ray based technologies, in situ spectrum technologies, and in situ scanning probe technologies, in enhancing our understanding of heterogeneous electrocatalytic reactions. The development and applications of these techniques, along with key questions that need to be addressed, are summarized.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Giorgia Greco, Giuseppe Antonio Elia, Daniel Hermida-Merino, Robert Hahn, Simone Raoux
Summary: The reaction mechanism of aluminum graphite dual ion cell during anion intercalation process is investigated using operando X-ray scattering. The research directly measures the repeated intercalation distance and microporosity of the cathode graphite, and observes the staging behavior, phase transitions, and reversibility of graphite intercalation compound formation. The study demonstrates complete reversibility of electrochemical intercalation process and nano- and micro-structural reorganization of natural graphite induced by intercalation. This work provides new thermodynamic insights into the intermediate phase transitions in graphite intercalation compound formation.
Article
Engineering, Multidisciplinary
Songbin Zhang, Hailong Qin, Zhuang Li, Chong Wei, Cheng Zhang, Xiaoqiang Li
Summary: The damage process and mechanism of Mo-SiCf/SiC cladding is revealed, showing that micro-cracks originate from pores in the outermost side of the SiCf/SiC layer and propagate along fiber bundles boundaries. Bamboo joint-like damage occurs in the SiCf/SiC layer during C-ring test due to periodic pore distribution. Mo-SiCf/SiC cladding exhibits better crack growth resistance and higher strength compared to SiCf/SiC cladding.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Environmental Sciences
Endong Miao, Yi Du, Hongyue Wang, Xufan Zheng, Xuguang Zhang, Zhuo Xiong, Yongchun Zhao, Junying Zhang
Summary: This study systematically investigated the direct aqueous mineral carbonation of wood combustion ash (WCA) under various operating conditions. The WCA demonstrated high CO2 sequestration characteristics, with an optimal carbonation efficiency of 76.4% and a CO2 sequestration capacity of 0.314 g CO2/g WCA. In addition, the dry residues from the liquid products showed potential as feedstocks for quality potash fertilizer. The proposed modified shrinking core models based on a diffusion-controlled mechanism provided a better fit to the experimental data compared to traditional kinetic equations.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Thomas Zillhardt, Genoveva Burca, Wolfgang Ludwig, Dong Liu, T. James Marrow
Summary: This study demonstrates that the reorientation of crystal domains accompanies the accommodation of mechanical strain in unirradiated polygranular graphite. The researchers used in situ neutron and synchrotron X-ray experiments to observe the changes in crystal orientation and local neutron scattering when strain was applied. The study provides new evidence for crystal deformation mechanisms that contribute to the elastic non-linearity and permanent set of polycrystalline graphite.
Article
Engineering, Multidisciplinary
Long Wang, Yushan Geng, A. Kiet Tieu, Guiojuan Hai, Hui Tan, Jiao Chen, Jun Cheng, Jun Yang
Summary: A FeCoCrNiAl high entropy alloy matrix composite containing graphite nanoplates was produced by spark plasma sintering method, and its tribological properties were tested under various loads and velocities. The results showed that the addition of graphite nanoplates significantly reduced the coefficient of friction and wear, attributing to the in-situ formed graphene and tribo-induced oxide layer on the rubbing interface.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Mechanics
Yakun Zhao, Song Gao, Xiantao Zhang, Xiaoxian Guo, Xin Li, Xinliang Tian
Summary: Direct numerical simulations were conducted to investigate the flow around an inclined thin square plate with different conditions, revealing the presence of four flow regimes: steady state, periodic state, quasi-periodic state, and chaotic state. The flow under the IL condition tends to lose symmetry more easily compared to the IS condition, and the critical Reynolds numbers at different bifurcations are generally higher for the square plate than for the circular disk.
Article
Chemistry, Multidisciplinary
Xiaomin Tang, Wei Chen, Xianfeng Yi, Zhiqiang Liu, Yao Xiao, Zhongfang Chen, Anmin Zheng
Summary: Carbonium ions, important reaction intermediates, are difficult to monitor in situ due to their short lifetime. Researchers successfully stabilized the 2NB(+) and observed its non-classical structure at ambient temperature without the need for a super acidic environment, providing a new strategy for expanding carbocation chemistry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Guangming Zhao, Yunduo Yao, Wei Lu, Guanyu Liu, Xuyun Guo, Antonio Tricoli, Ye Zhu
Summary: Direct observation of the oxygen evolution reaction (OER) on Mn2O3 nanocatalyst surface using in situ liquid holder in a transmission electron microscope (TEM) enables real-time visualization of the chemical process, shedding light on the dynamic OER catalysis and demonstrating a powerful strategy combining in situ and ex situ TEM for investigating various chemical reaction mechanisms in liquid.
Article
Materials Science, Multidisciplinary
Meiling Gao, Xianglong Wan, Shengfa Lai, Hao Cui, Zhibo Chen, Yanfeng Qian, Guoxin Ding, Guojun Cheng
Summary: Graphite powder used as a substrate for the in-situ polymerization growth of PANI/G composite shows significantly improved electrical conductivity through synergistic effects.
Article
Materials Science, Multidisciplinary
V. V. Kaverinsky, G. A. Bagliuk, Z. P. Sukhenko
Summary: The thermodynamic equilibria in the Al-Ti-C ternary system were studied using the CALPHAD method for synthesizing titanium carbides in an aluminum medium. Isothermal sections of the corresponding state diagram were obtained through calculation. A physically substantiated semi-empirical mathematical computer model was developed to describe the kinetics of TiC synthesis processes in the aluminum medium, based on the results of thermodynamic analysis. The experimental results showed that the aluminum content in the system significantly affects the temperature and dispersity of the synthesized titanium carbide particles.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
