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SSRN 2024年

作者： Cheng, Ming Li, Wen Wei, Qi Dun, Yuchao Chang, Wei Liu, Zeyu Jin, Lei Wei, Guoke Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering AVIC Manufacturing Technology Institute Beijing100024 China Science and Technology on Power Beam Processes Laboratory AVIC Manufacturing Technology Institute Beijing100024 China Technology Research Center Liyang Aero Power Co. LTD. AECC Guiyang550014 China

Metal corrosion incurs substantial economic and safety costs in industry, necessitating effective protective materials. Hexagonal boron nitride (h-BN) nanosheets, with their chemical stability and hydrophobicity, are an ideal choice for metal surface protection. However, optimizing their hydrophobic properties remains challenging. This study introduces an explainable AI-driven machine learning model to explore the impact of synthesis variables like temperature, heating time, and additive ratio on h-BN nanosheets' hydrophobicity. The model, with 82% accuracy, identified key variables and their nonlinear relationships, optimizing the nanosheets' hydrophobicity. By evaluating 687,500 conditions, AI-selected strategies significantly enhanced hydrophobicity, verified experimentally. This research underscores AI's potential in materials science, offering a new approach to developing advanced metal protective materials with theoretical and practical implications. © 2024, The Authors. All rights reserved.

关键词： Hydrophobicity

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Homogeneity and Activeness of Crowd on Aged Pedestrian Dynamics

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Procedia Computer science 2016年 83卷 361-368页

作者： Jun Zhang Shuchao Cao Daniel Salden Jian Ma Forschungszentrum Jülich GmbH Institute for Advanced Simulation 52425 Jülich Germany State Key Laboratory of Fire Science University of Science and Technology of China Hefei 230027 China School of Transportation and Logistics Southwest Jiaotong University Chengdu 610031 China

An aging population is bringing new challenges to the management of escape routes and facility design in many countries. In this paper the movement properties of middle- and old-aged adults are studied with series of single-file movement experiments under laboratory conditions. The fundamental diagrams for two different groups of pedestrians and time-space diagrams are compared. For the groups with different composition and status, the fundamental diagrams are totally different but maintain the same trend. Active crowd leads to inhomogeneous pedestrian flow but higher flow rate, while inactive pedestrians prefer to keep pace with others or keep larger personal space, which leads to more jams and stop-and-go waves. Density and inhomogeneous of speed do not always play main roles on the appearance of stop-and-go.

关键词： Aging effect Pedestrian dynamics Single-file flow Stop-and-go Aged crowd

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Applications of MXenes in human-like sensors and actuators

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Nano Research 2023年第4期16卷 5767-5795页

作者： Jinbo Pang Songang Peng Chongyang Hou Xiao Wang Ting Wang Yu Cao Weijia Zhou Ding Sun Kai Wang Mark H.Rümmeli Gianaurelio Cuniberti Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongUniversity of JinanJinan 250022China Institute for Materials Science and Max Bergmann Center of Biomaterials Technische Universität DresdenDresden 01069Germany Center for Advancing Electronics Dresden Technische Universität DresdenDresden 01069Germany Dresden Center for Computational Materials Science Technische Universität DresdenDresden 01062Germany Dresden Center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresden 01062Germany High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Microelectronic Devices&Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China State Key Laboratory of Biobased Material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353China School of Bioengineering Qilu University of TechnologyShandong Academy of ScienceJinan 250353China Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology(Ministry of Education) Northeast Electric Power UniversityJilin 132012China School of Electrical Engineering Northeast Electric Power UniversityJilin 132012China School of Electrical Engineering Weihai Innovation Research InstituteQingdao UniversityQingdao 266000China School of Electrical and Computer Engineering Jilin Jianzhu UniversityChangchun 130118China Institute for Complex Materials Leibniz Institute for Solid State and Materials Research Dresden(IFW Dresden)20 Helmholtz StrasseDresden 01069Germany College of Energy Soochow Institute for Energy and Materials Innovations Soochow UniversitySuzhou 215006China Key L

Human beings perceive the world through the senses of sight,hearing,smell,taste,touch,space,and *** first five senses are prerequisites for people to *** sensing organs upload information to the nervous systems,including the brain,for interpreting the surrounding ***,the brain sends commands to muscles reflexively to react to stimuli,including light,gas,chemicals,sound,and ***,as an emerging two-dimensional material,has been intensively adopted in the applications of various sensors and *** this review,we update the sensors to mimic five primary senses and actuators for stimulating muscles,which employ MXene-based film,membrane,and composite with other functional ***,a brief introduction is delivered for the structure,properties,and synthesis methods of ***,we feed the readers the recent reports on the MXene-derived image sensors as artificial retinas,gas sensors,chemical biosensors,acoustic devices,and tactile sensors for electronic ***,the actuators of MXene-based composite are ***,future opportunities are given to MXene research based on the requirements of artificial intelligence and humanoid robot,which may induce prospects in accompanying healthcare and biomedical engineering applications.

关键词： MXenes sensors actuators gas sensors biosensors tactile sensors sound sensors artificial retina

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Cylindrical vector beam-excited frequency-tunable second harmonic generation in a plasmonic octamer

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Photonics Research 2018年第3期6卷 157-161页

作者： FAJUN XIAO WUYUN SHANG WEIREN ZHU LEI HAN MALIN PREMARATNE TING MEI JIANLIN ZHAO MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information TechnologySchool of ScienceNorthwestern Polytechnical UniversityXi'an 710129China Department of Electronic Engineering Shanghai Jiao Tong UniversityShanghai 200240China Advanced Computing and Simulation Laboratory(AχL) Department of Electrical and Computer Systems Monash UniversityClaytonVlC 3800Australia

We report a method to tune the second harmonic generation(SHG) frequency of a metallic octamer by employing cylindrical vector beams as the excitation. Our method exploits the ability to spatially match the polarization state of excitations with the fundamental target plasmonic modes, enabling flexible control of the SHG resonant *** is found that SHG of the octamer is enhanced over a broad band(400 nm) by changing the excitation from the linearly polarized Gaussian beam to radially and azimuthally polarized beams. More strikingly, when subjected to an azimuthally polarized beam, the SHG intensity of the octamer becomes 30 times stronger than that for the linearly polarized beam even in the presence of Fano resonance.

关键词： SHG Cylindrical vector beam-excited frequency-tunable second harmonic generation in a plasmonic octamer

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Corrigendum to “The metallurgical bonding and high temperature tensile behaviors of 9Cr-1W steel and 316L steel dissimilar joint by friction stir welding” [J. Manuf. Process. 44 (2019) 241–251]

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Journal of Manufacturing Processes 2021年 64卷 1204-1205页

作者： Bin He Lei Cui Dongpo Wang Yongchang Liu Chenxi Liu Huijun Li Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and Engineering Tianjin University Tianjin 300354 PR China State Key Lab. of Hydraulic Engineering Simulation and Safety School of Materials Science & Engineering Tianjin University Tianjin 300354 PR China

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Li, An, and Morozov Reply:

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Physical Review Letters 2019年第11期123卷 119602-119602页

作者： Guodong Li Qi An Sergey I. Morozov Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics School of Science Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Chemical and Materials Engineering University of Nevada Reno Reno Nevada 89557 USA Department of Computer Simulation and Nanotechnology South Ural State University Chelyabinsk 454080 Russia

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Mold-Filling Ability of Aluminum Alloy Melt during the Two-Step Foaming Process

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Journal of Materials science & technology 2016年第6期32卷 509-514页

作者： Wang H Zhang M Zhou B C Yang D H Wu Y Liu X J Lu Z P University of Science and Technology Beijing State Key Laboratory for Advanced Metals and Materials Beijing 100083 Department of Aviation and Military Transportation Airforce Logistics College of PLA Xuzhou 221000 College of Mechanics and Materials Hohai University Nanjing 210098

For the two-step foaming method, one of the most cost-effective ways to fabricate three-dimensional shaped aluminum alloy foams with dense outer surface skin, it is crucial to describe and predict the moldfilling behavior of the shaped aluminum alloy foams with a favorable pore-distribution accurately. In this paper, a mold-filling model for semi-solid aluminum alloy foams was initially established and subsequently employed to predict the filling height, which represents the mold-filling ability of semi-solid aluminum alloy foams in a specially designed tube-like mold. Our results indicate that the proposed model can be applied to characterize the mold-filling property of aluminum alloy melts in a quantitative manner. Theoretically, our findings actually provide a guideline for mass-production of the shaped aluminum alloy foams by using the two-step foaming process.

关键词： Mould-filling Aluminum alloy Semi-solid metal forming

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CHARACTERIZATION, MECHINICAL, THERMAL AND ABLATIVE PROPERTIES OF CERAMIC MODIFIED PHENOLIC RESIN AEROGELS SYNTHSIZED BY AMBIENT PRESSURE DRYING

CHARACTERIZATION, MECHINICAL, THERMAL AND ABLATIVE PROPERTIE...

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第二十一届国际复合材料大会

作者： Jun Zhang Rongying Yin Haiming Cheng Changqing Hong Xinghong Zhang Songhe Meng National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology China Aerodynamics Research and Development Center Harbin Aircraft industry(Group)Co.Ltd Aviation Industry Corporation of China

During the past few decades, various organic aerogels（AGs） have been synthesized and shown number of exceptional and even unique properties, such as low bulk density, high porosity, grea surface areas, and extremely low thermal conductivity, which enable them being the focus of industr and ***, AGs exhibit substantial performance boosts in numerous applications such a adsorption, separation, catalysis, energy conversion and storage, and so ***, AG generally exhibit high cost, poor thermal and mechanical properties, which seriously restrict the large-scale *** this study, ceramic was introduced into commercial available resin derive aerogel due to the enhancement of silicon to thermal stability and low cost of the *** cerami modified phenolic resin（PR-SiO） aerogel was synthesized by a simple sol-gel polymerization o ceramic precursor, PR, hexamethylenetetramine in an ethylene glycol solution, followed by solven exchange and ambient pressure *** modified effect on the porous structure, textural property and thermal stability was studied by scanning electron microscope（SEM）, nitrogen adsorptio isotherms, and thermogravimetric analysis（TGA）.According to the characterizations of SEM an nitrogen adsorption, the obtained PR-SiO hybrid aerogels have a continuous three dimensiona network that consists of phenolic nano-particles and curved nano-sheets with size from 50 to 90 nm which define numerous mesopores and *** in argon atmosphere indicated that th thermal stability of the PR-SiO aerogels（both maximum decomposition rate and char yield a 1000 ℃） is better than that of the pristine PR *** order to improve the mechanical properties carbon fabric reinforced aerogel composite was prepared by impregnating carbon-bonded carbon fibe（CBCF） composite with the *** the micrographs of the aerogel matrix composite, the aerogel are fully and uniformly occupied the void between carbon fibers, and coated with a t

关键词： Ceramic Phenolic resin Aerogel Mechanical Properties Thermal Properties

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CMAS + sea salt corrosion to thermal barrier coatings

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Corrosion science 2023年第1期218卷

作者： Guo, Lei Zhang, Xinmu Liu, Mingguang Yang, Shuo Dai, JianWei School of Materials Science and Engineering Tianjin University Tianjin300072 China Tianjin Key Laboratory of Advanced Joining Technology Key Lab of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin300072 China Naval Logistics Academy Tianjin300450 China Center for analysis and Test Tianjin University 300072 China Key laboratory for advanced corrosion and protection of aviation materials AECC Beijing Institute of Aeronautical Materials Beijing100095 China

In marine environment, sea salt and calcium-magnesium-alumina-silicate (CMAS) coexist largely endangering thermal barrier coatings (TBCs) service safety. In this study, the corrosion behavior of synthetic sea salt and CMAS to TBCs was investigated. Sea salt changed the CMAS structure, thereby decreasing its melting temperature and high-temperature viscosity. At 1200 ℃, CMAS + sea salt completely melted but CMAS did not;at 1250 ℃, both melted while CMAS + sea salt had stronger penetration ability in TBCs than CMAS. Thus, TBCs which have not been or are less affected by CMAS may be damaged due to CMAS + sea salt attack. © 2023 Elsevier Ltd

关键词： Alumina

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Angular Deviation and Influential Factors of Burgers Orientation Relationship During Β→Α Transformation in Titanium Alloys

SSRN

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SSRN 2023年

作者： Li, Mingbing Wang, Kai Wang, Bin Lv, Chao Wang, Xinnan Li, Xing Zhu, Zhishou Hou, Huilong Zhao, Xinqing School of Materials Science and Engineering Beihang University Beijing100191 China Key Laboratory of Advanced Titanium Alloys Beijing Institute of Aeronautical Materials Aero Engine Corporation of China Beijing100095 China MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology Nanjing University of Science and Technology Nanjing210094 China Tianmushan Laboratory Zhejiang Provincial Laboratory for Aviation Hangzhou311312 China

The Burgers orientation relationship commonly observed during β→α transformation in titanium alloys exhibits an angular deviation in crystallographic orientation. Determining the possible angular deviations and governing factors is of great importance for controlling the microstructure and properties of alloys. Herein, we propose a calculation method to determine the angular deviations, Δθ, from the ideal Burgers orientation relationship. The calculated results show that the angular deviations exist between the β and α phases in α colonies for Ti-6Al-4V and Ti-6.5Al-2Zr-1Mo-1V alloys. The angular deviations originate from the lattice distortions by the dislocations in the α phase and β phase and their interfaces. Our work indicates that a tolerance angle could be used to determine whether the α phase and β phase obey the Burgers orientation relationship in polycrystalline titanium alloys. The proposed method offers an approach to quantify the variations of the Burgers orientation relationship and develops the understanding of crystallographic evolutions. © 2023, The Authors. All rights reserved.

关键词： Titanium alloys

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