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22nd International Conference on Composite Materials, ICCM 2019

作者： Qi, Yun-Chao Fang, Guo-Dong Liang, Jun Xie, Jun-Bo Science and Technology on Advanced Composites in Special Environments Key Laboratory Harbin Institute of Technology Harbin15008 China School of Aerospace Engineering Beijing Institute of Technology Beijing100081 China Key Laboratory of Advanced Textile Composite Materials of Ministry of Education Tianjin Polytechnic University Tianjin300387 China

To build the relationship between needled process parameters and C/C-SiC composites stiffness, and get better process parameters to improve the stiffness performances of composites, a surrogate model for optimizing process parameters of three dimensional needled preforms of C/C-SiC composites was established based on back propagation (BP) neural network combing with improved genetic algorithm. The stiffness prediction was realized by BP network. The predicted value of the network is almost identical with the finite element calculation, so the prediction accuracy of the model is high. The genetic strategy and optimization strategy of genetic algorithm were improved. Two improved genetic algorithms were used to optimize the process parameters. The obtained process parameters can significantly improve the stiffness of the material. © 2019 International Committee on Composite Materials. All rights reserved.

关键词： Genetic algorithms

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Aluminate/Co Composite Absorbing Materials Developing for Elevated-Temperature and High-Efficiency Electromagnetic Absorbing (EMA) Materials

SSRN

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SSRN 2025年

作者： Guan, Zhen-Jie Yang, Bo-An Yuan, Yong Jiang, Jian-Tang Li, Yang Song, Bo Sun, Xue-Yin Gong, Yuan-Xun Yan, Shao-Jiu Shao, Wen-Zhu Zhen, Liang School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China School of Materials and Metallurgy University of Science and Technology Liaoning Liaoning 114051 China Shanghai Aerospace Precision Machinery Research Institute Shanghai201109 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Aerospace Research Institute of Special Material and Processing Technology Beijing100074 China Beijing Institute of Aeronautical Materials Beijing100095 China Nanjing University of Aeronautics and Astronautics Nanjing210016 China

For the design requirements of structural/functional integrated components, it is increasingly urgent to find EMA materials that combine high-efficiency EMA performances with load-bearing capacity. Herein, aluminate/Co composite absorbing materials were prepared through mechanical mixing combined with a hydration hardening process. The microstructures of the composite specimens were controlled by adjusting the shape of Co particles, and cordierite particles were added to further regulate the distribution of Co particles. Compared to spherical Co particles, flake-shaped Co particles exhibit superior electromagnetic parameters. However, the excessively high conductivity of Co flakes filled specimen leads to a significant degradation in their impedance matching, resulting in a rapid attenuation of the electromagnetic performances. The temperature-dependent ionic conductivity plays an important role in controlling the elevated-temperature conductivity and can be suppressed by adding a second dielectric component. For a 2 mm composite specimen, the maximum reflection loss (RLmax) reaches -13.1 dB, and the effective absorption bandwidth (RL © 2025, The Authors. All rights reserved.

关键词： Composite coatings

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Ultrahigh Gain of a Vacuum-Ultraviolet Photodetector Based on a Heterojunction Structure of AlN Nanowires and NiO Quantum Dots

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Physical Review Applied 2020年第6期13卷 064036-064036页

作者： Mengting Liu Xianjie Wang Tai Yao Bin Fang Yiyong Wu Chengyue Sun Zhongming Zeng Bo Song School of Physics Harbin Institute of Technology Harbin 150001 China Interdisciplinary Science Research Center Harbin Institute of Technology Harbin 150001 China Key Laboratory of Nanodevices and Applications Suzhou Institute of Nano-tech and Nano-bionics Chinese Academy of Science Suzhou 215123 China School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150001 China

Aluminum nitride (AlN) is a promising candidate for the manufacture of vacuum ultraviolet (VUV) photodetectors. However, its poor electrical conductivity limits its applications. Herein, a high-performance AlN nanowire (NW)-NiO quantum dot (QD) based VUV photodetector is constructed via a mixed-dimensional strategy. The formation of isolated nanoscale p-n heterojunctions greatly increases the concentration of photogenerated electrons, resulting in an ultrahigh photoconductive gain (9.96) in the AlN NW-NiO QD material, which is about 27-fold higher than that of AlN NW (0.368). In addition, the significant improvement in both photocurrent and response speed convincingly suggest the great potential of AlN NW-NiO QD based VUV photodetectors. Furthermore, the properties of these photodetectors in an irradiation environment are also evaluated here. It is found that AlN NW exhibits excellent anti-irradiation characteristics towards both electron and proton irradiation, while the AlN NW-NiO QD material also presents promising potential under low-dose electron irradiation. This study can be used as a guideline to design and fabricate high-performance VUV photodetectors based on wide-band-gap semiconductors coupled with other nanostructured systems.

关键词： Optical sources & detectors Optoelectronics Heterostructures III-V semiconductors Junctions Nanowires Quantum dots Transition metal oxides

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Microstructure, mechanical properties and oxidation resistance of C/C-SIC-ZRB2 composites 22

Microstructure, mechanical properties and oxidation resistan...

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22nd International Conference on Composite Materials, ICCM 2019

作者： Han, Wenbo Zhou, Changling Wang, Chonghai Zhang, Yumin Zhang, Huayu Wang, Zhuju National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin China Shandong Industrial Ceramic Research and Design Institute Co. Ltd. Zibo China Shenzhen China

To overcome the poor oxidation resistance of C/C composites, anti-oxidation SiC and ZrB2-SiC ceramics were introduced into C/C composites by chemical vapor infiltration (CVI) and precursor infiltration-pyrolysis (PIP). The microstructure, mechanical properties and oxidation resistance of C/C-SiC-ZrB2 composites were investigated. The ZrB2-SiC ceramic exhibits uniform dispersion and distribution in C/C composite. The C/C-SiC-ZrB2 composites pyrolyzed at 1500°C has the highest flexural strength (315 MPa) and fracture toughness (10.87 MPam1/2). The flexural strength, tensile strength and compressive strength increased with temperature. The C/C-SiC-ZrB2 composites exhibited low ablation characteristics in plasma ablation experiments, and the linear ablation rate was 3.67×10-3 mm/s. The composite material, which exhibited synergistic effect between toughening and oxidation resistance, has potential application in the field of hypersonic vehicle. © 2019 International Committee on Composite Materials. All rights reserved.

关键词： Microstructure

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Optimal isotropic, reusable truss lattice material with near-zero Poisson’s ratio

arXiv

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arXiv 2020年

作者： Chen, Xueyan Moughames, Johnny Ji, Qingxiang Martínez, Julio Andrés Iglesias Tan, Huifeng Adrar, Samia Laforge, Nicolas Cote, Jean-Marc Euphrasie, Sébastien Ulliac, Gwenn Kadic, Muamer Laude, Vincent National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology 92 Xidazhi Street Harbin150001 China Institut FEMTO-ST CNRS Université Bourgogne Franche-Comté Besançon25000 France

Cork is a natural amorphous material with near-zero Poisson’s ratio that is ubiquitously used for sealing glass bottles. It is an anisotropic, transversally isotropic, composite that can hardly be scaled down. Here, we propose a new class of isotropic and reusable cork-like metamaterial that is designed from an hybrid truss-lattice material to show an isotropic Poisson’s ratio close to zero. Optimization is conducted using a multi-objective genetic algorithm, assisted by an elliptical basis function neural network, and coupled with finite element simulations. The optimal micro-structured metamaterial, fabricated by two-photon lithography with a lattice constant of 300 µm, has an almost isotropic Poisson’s ratio smaller than 0.08 in all directions. It can recover 96.6% of its original shape after a compressional test exceeding 20% strain. Copyright © 2020, The Authors. All rights reserved.

关键词： Metamaterials

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Microstructure and Tribological Properties of Laser Melting Deposited Ti-6Al-4V Coating on Cu-Cr-Zr Substrate

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advanced Engineering Materials 2025年

作者： Xie, Shiqiang Huang, Changlin Ding, Chaoyi Wen, Yan Wang, Liqiang Xie, Lechun Hua, Lin State Key Laboratory of Superalloy and Application Technology Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China Hubei Longzhong Laboratory Hubei Xiangyang441000 China State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai200240 China

Copper alloys are extensively utilized in electronics, electrical, and transportation because of their outstanding thermal and electrical conductivity. However, their low hardness and wear resistance restrict their utilization in some special environments. To address these issues, laser melting deposition (LMD) is utilized to fabricate Ti-6Al-4V coating on Cu-Cr-Zr substrate. The microstructure and mechanical properties of the interface between the coating and the substrate are analyzed. The results show that the composition of the transition zone is highly eutectic, mainly composed of Cu3Ti2 and Cu4Ti. The LMD-constructed Ti-6Al-4V/Cu-Cr-Zr (TC4/Cu-Cr-Zr) has a shear strength of 101.11 MPa and a shear deformation strain of more than 23%. In terms of wear resistance, the wear rate of the coating is measured at 8.29 × 10−5 mm3 N−1 m−1 under a 5 N load, which represents a 64.27% reduction compared to that of the substrate. The microhardness of the coating increased by a factor of 3.84 compared to that of the substrate. In general, Cu was melted into the titanium coating under LMD. The intermetallic compounds generated by reaction between Cu and titanium promoted the coating bonding strength, and the titanium coating improved the wear resistance of the copper alloy. © 2025 Wiley-VCH GmbH.

关键词： Microhardness

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Reconstruction of Ferromagnetic/Paramagnetic Cobalt-Based Electrocatalysts under Gradient Magnetic Fields for Enhanced Oxygen Evolution

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Angewandte Chemie 2024年第46期136卷

作者： Shengyu Ma Kaixi Wang Moniba Rafique Prof. Jiecai Han Qiang Fu Sida Jiang Prof. Xianjie Wang Tai Yao Prof. Ping Xu Bo Song School of Physics Harbin Institute of Technology 150001 Harbin China Zhengzhou Research Institute Harbin Institute of Technology 450046 Zhengzhou China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology 150001 Harbin China Laboratory for Space Environment and Physical Sciences Harbin Institute of Technology 150001 Harbin China State Key Laboratory of Space Power-Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology 150001 Harbin China National Key Laboratory of Laser Spatial Information 150001 Harbin China Frontier Research Center of Space Environment Interacting with Matter Harbin Institute of Technology 150001 Harbin China

The rational manipulation of the surface reconstruction of catalysts is a key factor in achieving highly efficient water oxidation, but it is a challenge due to the complex reaction conditions. Herein, we introduce a novel in situ reconstruction strategy under a gradient magnetic field to form highly catalytically active species on the surface of ferromagnetic/paramagnetic CoFe 2 O 4 @CoBDC core–shell structure for electrochemical oxygen evolution reaction (OER). We demonstrate that the Kelvin force from the cores’ local gradient magnetic field modulates the shells’ surface reconstruction, leading to a higher proportion of Co 2+ as active sites. These Co sites with optimized electronic configuration exhibit more favorable adsorption energy for oxygen-containing intermediates and lower the activation energy of the overall catalytic reaction. As a result, a significant enhancement in OER performance is achieved with a large current density increment about 128 % at 1.63 V and an overpotential reduction by 28 mV at 10 mA cm −2 after reconstruction. Interestingly, after removing the external magnetic field, the activity could persist for over 100 h. This work showcases the directional surface reconstruction of catalysts under a gradient magnetic field for enhanced water oxidation.

关键词： Gradient magnetic field oxygen evolution reaction electrochemical reconstruction ferromagnetic/paramagnetic electrocatalyst divalent cobalt

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Hydrophobic interaction determines docking affinity of SARS-CoV-2 variants with antibodies

arXiv

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arXiv 2021年

作者： Li, Jiacheng Hou, Chengyu Wang, Menghao Liao, Chencheng Guo, Shuai Shi, Liping Ma, Xiaoliang Zhang, Hongchi Jiang, Shenda Zheng, Bing Ye, Lin Yang, Lin He, Xiaodong National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology Harbin150080 China School of Electronics and Information Engineering Harbin Institute of Technology Harbin150080 China School of Chemistry and Materials Science Heilongjiang University Harbin150001 China School of Aerospace Mechanical and Mechatronic Engineering The University of Sydney NSW2006 Australia Shenzhen STRONG Advanced Materials Research Institute Co. Ltd Shenzhen518035 China

Preliminary epidemiologic, phylogenetic and clinical findings suggest that several novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants have increased transmissibility and decreased efficacy of several existing vaccines. Four mutations in the receptor-binding domain (RBD) of the spike protein that are reported to contribute to increased transmission. Understanding physical mechanism responsible for the affinity enhancement between the SARS-CoV-2 variants and ACE2 is the "urgent challenge" for developing blockers, vaccines and therapeutic antibodies against the coronavirus disease 2019 (COVID-19) pandemic. Based on a hydrophobic-interaction-based protein docking mechanism, this study reveals that the mutation N501Y obviously increased the hydrophobic attraction and decrease hydrophilic repulsion between the RBD and ACE2 that most likely caused the transmissibility increment of the variants. By analyzing the mutation-induced hydrophobic surface changes in the attraction and repulsion at the binding site of the complexes of the SARS-CoV-2 variants and antibodies, we found out that all the mutations of N501Y, E484K, K417N and L452R can selectively decrease or increase their binding affinity with some antibodies. © 2021, CC BY.

关键词： Antibodies

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Overcoming electron/ion transport barriers in NASICON-type cathode through mixed-conducting interphase

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Chinese Chemical Letters 2024年

作者： Nan Zhang Qian Yan Xiaorui Dong Jingyang Wang Fan Jin Jiaxuan Liu Dianlong Wang Huakun Liu Bo Wang Shixue Dou State Key Laboratory of Space Power-Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 China School of Sustainable Energy and Resources School of Materials Science and Intelligent Engineering Nanjing University Suzhou 215163 China Institute of Energy Material Science University of Shanghai for Science and Technology Shanghai 200093 China Institute for Superconducting & Electronic Materials Australian Institute of Innovative Materials University of Wollongong Wollongong NSW 2500 Australia

The NASICON-structured Na 3 MnTi(PO 4 ) 3 (NMTP) cathode has attracted widespread attention due to its prominent thermal stability, stable 3D structure and rapid sodium ion transport channel. However, the poor cycling stability, limited electronic conductivity and phase transition represent significant obstacles to for its commercialization. Herein, an innovative mixed-conducting interphase, comprising amorphous carbon and Ti 3 C 2 -MXene, was developed for NMTP. NMTP particles are evenly dispersed on the MXene sheets through electrostatic adsorption, and MXenes can also regulate the growth of NMTP crystals and provide a large number of active sites in contact with the electrolyte. Furthermore, DFT calculations demonstrate that MXene enhances both electron and ion transport processes. Therefore, the mixed-conducting interphase, forming an interconnected network on the NMTP surface, serves as an artificial cathode electrolyte interface, significantly enhancing the dynamic processes and cycle stability of the NMTP cathode. The NMTP/C@Ti 3 C 2 exhibits a fully reversible three-electron redox reaction and inhibited voltage hysteresis. An excellent reversible capacity of 158.2 mAh/g is achieved at 0.2 C, corresponding to an extremely high energy density of 466.6 Wh/kg. This study presents an effective approach for developing high-energy SIB cathodes.

关键词： Sodium-ion batteries NASICON structure Na 3 MnTi(PO 4 ) 3 Mixed-conducting interphase MXenes

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Synthesis of Fe3o4@Sio2@C Microspheres for Enhanced Electromagnetic Wave Absorption

SSRN

引用

SSRN 2022年

作者： Lv, Fanglin Yu, Shitao Jiang, Long Ji, Renjie Jia, Zhen Zhang, Jingyun Liu, Mingya Liu, Shiwei Li, Lu Liu, Yue State Key Laboratory Base of Eco-chemical Engineering College of Chemical Engineering Qingdao University of Science and Technology 53 Zhengzhou Road Qingdao266042 China CAS Key Laboratory of Bio-based Materials Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao266101 China AVIC Research Institute for Special Structures of Aeronautical Composites 19 Jiqi Road Jinan250000 China Shandong Linyi Sunny Wealth Chemicals Company Limited Shandong Linyi276000 China

Electromagnetic wave absorbing materials usually had the problems of wide thickness, poor absorption performance and narrow band width. This is the deficiency in practical application In the paper, a dual-core-shell absorbing material was prepared by using silica as the middle shell, ferrite as the carbon layer was the core layer and the carbon layer was the outer laye (Fe 3 O 4 @SiO 2 @C). By adjusting shell thickness, the best absorbing property can be obtained. In particular, silica layer was used as the intermediate to combine its absorbing achieve better impedance matching performance, adjusted the shell thickness to achieve better absorbing performance, For a sample with a matching thickness of 4 mm, the minimum reflection loss was - 36.4 dB and the maximum effective bandwidth is 5.8 GHz. which can be used as an excellent absorbing material. © 2022, The Authors. All rights reserved.

关键词： Silica

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