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Space Solar Power and Wireless Transmission 2025年第1期2卷 54-64页

作者： Shuo Bian Size Ai Jianzheng Wei Zhimin Xie Guochang Lin Dongjie Zhang Huifeng Tan Qingxiang Ji Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 China School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 China Université de Franche-Comté Institute FEMTO-ST CNRS Besançon 25000 France

With the growing global energy demand and the pursuit of sustainable energy, solar energy has received widespread attention as a clean and renewable energy source. A structural design of an inflatable, large-scale solar concentrating reflector based on in-orbit assembly is proposed in this paper. The axisymmetric inflated reflector surface is inversely designed through membrane mechanics, and the internal pressures to maintain the reflector surface morphology at different orbital positions and the tiny deformation produced by the reflecting surface under the action of the uniform pressure are determined. A inflatable-rigidizable support structure is prepared by using a rigidizable aramid fabric-reinforced composite. The support structure used to the parabolic reflecting surface is designed, and the diameter and spacing distance of the resistance wire of the heating layer are determined by electrothermal simulation; the combination of solar radiation and electric heating is used to rigidize the reflector in orbit, and the corresponding electric heating time at different orbital positions is also analyzed by in orbit simulation. The heating voltage, folding radius and folding method of the rigidizable support structure are determined through the experimental design, and the folding and deployment experiments are carried out by using the heating and internal pressure and the final shape recovery rate of the support tube is approximately 100 %, which verifies the feasibility of its folding and deployment.

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Biomass Carbon Nanosphere-Based Piezoresistive Flexible Pressure Sensors for Motion Capture and Health Monitoring

SSRN

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SSRN 2024年

作者： Yang, Wenchuang Han, Xinyuan Yin, Cailiu Zhang, Xinjiang Peng, Qingyu Yi, Chunqiang Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization School of Materials and Environment Guangxi Colleges Universities Key Laboratory of Environmental-friendly Materials and Ecological Restoration Guangxi Minzu University Nanning530105 China 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

Biomass carbon-based piezoresistive flexible pressure sensors have shown significant potential in various applications. Indeed, biomass carbon-based flexible sensors, such as carbonized cotton fabrics, exhibit limitations in terms of sensitivity and response speed. Herein, a kind of biomass carbon nanosphere-based piezoresistive flexible pressure sensor was proposed and developed by embedding biomass carbon nanospheres on the skin-like structures of the polydimethylsiloxane surface. The carbon nanospheres were obtained through the carbonization of cuttlefish ink. Owing to the skin-like structures fabricated on the surface of the composite films, the sensors achieve a sensitivity of 135.2 kPa-1 in the pressure range of 0-1 kPa. In addition, the sensors exhibit a short response (43 ms) and recovery time (23 ms). With these properties, the sensors were applied to motion capture and health monitoring. © 2024, The Authors. All rights reserved.

关键词： Silicones

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Bioinspired Multi-Stimulus Responsive Mxene-Based Soft Actuator with Self-Sensing Function and Various Biomimetic Locomotion

SSRN

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SSRN 2023年

作者： Xu, Liangliang Zheng, Haowen Xue, Fuhua Ji, Qixiao Qiu, Changwen Yan, Qian Ding, Renjie Zhao, Xu Hu, Ying Peng, Qingyu 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 Institute of Industry and Equipment Technology Hefei University of Technology Hefei230009 China

Although a series of outstanding achievements have been realized so far, developing soft actuators that can respond to various stimuli and simulate biological versatility (e.g., self-sensing function, diverse locomotion, etc.) is still a great challenge. Here, by utilizing internal stress generated spontaneously during the preparation process, an originally rolled MXene/polydimethylsiloxane (PDMS) bimorph soft actuator has been designed and fabricated. Based on the outstanding photothermal/electrothermal conversion efficiency and adjustable interlayer d-spacing change of Ti3C2Tx MXene, and the large thermal/chemical vapor expansion of crosslinked PDMS, this actuator can produce reversible large deformation under various forms of stimulus, including heat, light, electric, and n-hexane vapor. More importantly, microcracks can be formed spontaneously on the surface of MXene layer during the fabrication process of the actuator, which causes the resistance of MXene layer to be very sensitive to mechanical deformation. Based on this, a light-driven artificial tongue is fabricated, which not only mimic the ejection motion and catching prey behavior of the frog’s tongue, but also perceive the touching object. Moreover, a series of sophisticated biomimetic locomotion such as jumping, crawling, and self-oscillation all can be realized by using this soft actuator. Besides, the actuator with rolled initial structure can also be an intelligent gripper with low energy consumption. By doping Fe3O4 nanoparticles in PDMS matrix, the composite actuator can carry object to through complex maze in adjustable magnetic field without additional stimulation. This MXene-based actuator provides new insights in design of next generation of smart actuators with multi-functions and multiform motions. © 2023, The Authors. All rights reserved.

关键词： Magnetite

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Welding Process Parameters and Mechanical Properties of Carbon Fiber-Reinforced Thermoplastic composites: Experimental and Simulation Analysis

SSRN

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SSRN 2024年

作者： Wang, Bing Yu, Lin Li, Menglei Guo, Jiabao Ji, Chunming Hu, Jiqiang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150001 China Beijing Institute of Astronautical Systems Engineering Beijing100076 China AVIC Jonhon Optoelectronics Technology Co. Ltd. Luoyang471000 China

Based on the fusible welding characteristic of thermoplastic composites, this paper develops a resistance welding apparatus to investigate the influence of welding parameters on welding performance and determine optimal welding parameters. To apply numerical simulation to study the mechanical properties of welded composite structures, we propose a multiscale model that combines experiments and micromechanical models. The experiments provide the normal fracture toughness and the tangential mechanical properties of the welds, while the micromechanical model based on the fast Fourier transform (FFT) method and the phase field method (PFM) provides the normal strength of the welds, and cohesive elements are used to simulate the welds. The correctness of the results calculated by the proposed multiscale model is verified based on double cantilever beam (DCB) experiments and T-joint structures. And further investigating the influence of laminate thickness on DCB performance and the failure mechanism of T-joints under bending loads based on this multiscale model. © 2024, The Authors. All rights reserved.

关键词： Welds

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Gradient C f /ZrB 2 -SiC composites integrating low-density, good mechanical properties and heat-resistant

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Journal of Materials science & technology 2026年 242卷 156-165页

作者： Qiang Gao Ping Hu Yuxuan Xia Yuan Cheng Guangdong Zhao Jiaxin Feng Zibin Chen Xinghong Zhang 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 Beijing Power Machinery Institute The Third Academy of State-owned Aerospace Giant China Aerospace Science & Industry Corporation (CASIC) Beijing 100074 China School of Chemistry and Materials Science Heilongjiang University Harbin 150080 China

Ultra-high temperature ceramic composites (UHTCCs) with low density and exceptional heat resistance are essential for hypersonic vehicle applications, enabling increased payload capacity and higher Mach numbers. However, developing a fabrication process that enables UHTCCs with both lightweight and superior thermal protection performance is still a challenge. To tackle this problem, in this study, a combinatorial process of vibration-assisted slurry impregnation and polymer infiltration pyrolysis was developed to fabricate gradient lightweight C f /ZrB 2 -SiC composites, consisting of continuous carbon fiber fabric, ZrB 2 -SiC and a carbon aerogels (CAs) layer. The resulting composites exhibit a low density of (0.62–0.96 g cm −3 ) but excellent oxidation and ablation resistance, which can withstand ultrahigh temperatures between 2100 °C and 2500 °C. The porous C f /CAs layer, with a density of 0.38 g cm −3 and specific bending and compressive strengths of 43.47 MPa/(g cm −3 ) and 15.53 MPa/(g cm −3 ), respectively, provides both structural integrity and lightweight properties to the C f /ZrB 2 -SiC composite. Furthermore, the density of the composites can be precisely tailored by adjusting the thickness of the C f /ZrB 2 -SiC layer, allowing for customized fabrication to meet diverse service environment requirements. This flexibility highlights the adaptability of the combined processing techniques. The unique combination of controllable low-density properties and exceptional oxidation and ablation resistance endows gradient lightweight C f /ZrB 2 -SiC composites are promising as lightweight, ultra-high temperature thermal protection systems for hypersonic vehicle applications.

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Ultra-fast synthesis and thermodynamic analysis of MoAlB by self-propagating high temperature combustion synthesis

arXiv

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arXiv 2022年

作者： Yin, Hang He, Xiaodong Song, Guangping Yu, Yongdong Zheng, Yongting Bai, Yuelei National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Centre for Composite Materials and Structures Harbin Institute of Technology Harbin150080 China

MoAlB as a typical member of the MAB phases has attracted much growing attention due to its unique properties. However, the low production of MoAlB powders limits its further development and potential applications. To respond this challenge, the ultra-fast preparation of high-purity MoAlB powders is achieved in a few seconds by self-propagating high temperature combustion synthesis (SHS) using the raw powder mixture at the atomic ratio of 1Mo/1.3Al/1B. The reaction mechanism in SHS process was obtained by analyzing the corresponding composition changes of starting materials. Furthermore, the thermodynamic prediction for the SHS reaction of Mo + (1+ y) Al + B = MoAlB + yAl is consistent with the present experiments, where the preparation of MoAlB also conforms to two common self-propagating conditions of SHS. Enthalpy vs temperature curve shows that the adiabatic temperature of the reaction decreases with increasing the amount of excuse Al, but increases when pre-heating the reactants. The thermodynamic calculation method also provides a new idea for the preparation of other MAB phases by SHS. © 2022, CC BY-NC-SA.

关键词： Temperature

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Microstructural Formation and Evolution of Near-Eutectic Al2o3-Zro2 Powders Prepared by a Rapid Cooling Technique: An Extended Composition Range for Complete Eutectic Microstructures Without Primary Dendrites

SSRN

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SSRN 2022年

作者： Yuan, Yuchen Yu, Wanjun Zheng, Yongting Yu, Yongdong Liu, Xudong Yin, Hang 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

Regulation of eutectic compositions is a difficult challenge due to the limited formation range of this microstructure. Al2O3-ZrO2 powders were successfully prepared through a modified high-temperature melt-assisted air atomization technique. The high-temperature melt (3500 K) was obtained based on the exothermic reaction between Al and O2, which was subsequently atomized and quenched to form composite powders. Eutectic colonies with nanolamellae (62–79 nm) were observed in the as-prepared Al2O3-(28–58 mol%) ZrO2 powders. Importantly, the powders with ZrO2 contents of 38 mol% and 42 mol% showed complete eutectic microstructures without primary dendrites, which indicated an extended obtainable range deviating by ~4.9 mol% from the eutectic composition (CE). The microstructural formation mechanism was discussed based on solidification behavior analysis. Furthermore, the evolution of the microstructure and phase in Al2O3-42 mol% ZrO2 powders was investigated. This work provides a reference for the composition regulation of oxide eutectics. © 2022, The Authors. All rights reserved.

关键词： Eutectics

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Layer Hall Detection of the Néel Vector in Centrosymmetric Magnetoelectric Antiferromagnets

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Physical Review Letters 2024年第9期133卷 096803页

作者： L. L. Tao Qin Zhang Huinan Li Hong Jian Zhao Xianjie Wang Bo Song Evgeny Y. Tsymbal Laurent Bellaiche School of Physics Key Laboratory of Material Simulation Methods and Software of Ministry of Education College of Physics International Center of Future Science National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience Smart Ferroic Materials Center Physics Department and Institute for Nanoscience and Engineering Department of Materials Science and Engineering Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel

The efficient detection of the Néel vector in antiferromagnets is one of the prerequisites toward antiferromagnetic spintronic devices and remains a challenging problem. Here, we propose that the layer Hall effect can be used to efficiently detect the Néel vector in centrosymmetric magnetoelectric antiferromagnets. Thanks to the robust surface magnetization of magnetoelectric antiferromagnets, the combination of sizable exchange field and an applied electric field results in the layer-locked spin-polarized band edges. Moreover, the Berry curvature can be engineered efficiently by an electric field, which consequently gives rise to the layer-locked Berry curvature responsible for the layer Hall effect. Importantly, it is demonstrated that the layer Hall conductivity strongly depends on the Néel vector orientation and exhibits rich electromagnetic responses, which can be used to detect the Néel vector reversal. Based on density functional theory calculations, we exemplify those phenomena in the prototypical Cr2O3 compound. A complete list of the magnetic point groups sustaining the layer Hall effect is presented, aiding the search for realistic materials. Our work proposes a novel approach to detect the Néel vector and holds great promise for antiferromagnetic spintronic applications.

关键词： Anomalous Hall effect Magnetoelectric effect Transport phenomena Antiferromagnets Multiferroics First-principles calculations k dot p method

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Rashba-like spin splitting around non-time-reversal-invariant momenta

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Physical Review B 2023年第23期107卷 235138-235138页

作者： L. L. Tao Jiayu Li Yuntian Liu Xianjie Wang Yu Sui Bo Song M. Ye. Zhuravlev Qihang Liu School of Physics Harbin Institute of Technology Harbin 150001 China Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology Shenzhen 518055 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150001 China St. Petersburg State University St. Petersburg 190000 Russia

The ubiquitous Rashba spin splitting occurring around time-reversal-invariant momenta (TRIM) reflects the fundamental interplay between spin-orbit coupling (SOC) and crystalline symmetry. Unexpectedly, recent measurements reveal novel Rashba spin splitting around the momenta lacking time-reversal symmetry (non-TRIM), whose mechanism remains elusive. Here, we theoretically elucidate the microscopic origin of Rashba spin splitting around non-TRIM and identify the design principles for its appearance. Conventionally, a Zeeman-like spin splitting dominates around non-TRIM due to the broken time-reversal symmetry and diminishes the Rashba-like features. Our results show that the Bloch wave function with specific orbital representation at certain non-TRIM could eliminate the first-order SOC effect. As a result, the corresponding little group hosts a type of quasisymmetry that commutes with the dominating SOC Hamiltonian, leading to a tiny SOC gap and helical spin texture. Furthermore, such a quasi-symmetry-induced tiny gap could manifest large Berry curvature, which is desirable for various topological applications. Our work expands the concept of Rashba physics beyond the conventional TRIM scenario, paving an avenue for designing novel spin-splitting materials through the cooperation of symmetry and orbital engineering.

关键词： Crystal symmetry Rashba coupling Spin-orbit coupling Interfaces Density functional calculations

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Polarization Multiplexing Graphene-Based Coding Metasurfaces For Flexible Wavefront Manipulation And Polarization of Terahertz Beam

SSRN

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SSRN 2023年

作者： He, Xunjun Lu, Jinliang Jiang, Jiuxing Yao, Yongtao Zhang, Ying School of Electrical and Electronic Engineering Harbin University of Science and Technology Harbin150080 China College of Science Harbin University of Science and Technology Heilongjiang150080 China National key laboratory of science and technology on advanced composites in special environments Harbin Institute of Technology Harbin150080 China

Recently, the wavefront control devices based on terahertz metasurfaces have drawn enormous attention in next-generation (6G) communication applications. Generally, these devices achieve dynamic wavefront control by integrating the metasurfaces with traditional active materials. However, most existing devices suffer from limitations such as single polarization mode of incident waves and intrinsic properties of the active materials, which hinder their developments and applications. To address these challenges, herein, we design graphene-based reflection coding metasurfaces for active wavefront control. The coding meta-atom is composed of a graphene split ring resonator, a dielectric layer, and a metal ground plate. Furthermore, by rotating the coding meta-atom, an independent 2π phase coverage may be obtained for CP or LP illuminations, enabling the polarization multiplexing. Based on the vortex phase profile, a proof-of-concept metasurface (MS-1) is constructed to generate different wavefront responses. By altering the polarization mode of incident waves and Fermi level of coding regions, these wavefronts can be actively switched between a vortex beam, multi-beam, and specular reflection beam. Additionally, according to the parabolic phase profile, another metasurface (MS-2) is developed to create a tunable metalens, allowing for active control over its focusing intensity and focal depth by adjusting the Fermi level of graphene. Therefore, these wavefront-controlled metasurfaces have high capacity and integration due to polarization multiplexing and active modulation, making them highly promising for potential applications in terahertz communications. © 2023, The Authors. All rights reserved.

关键词： Graphene

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