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Refined platelet size: Unlocking enhanced mechanics in nacre-mimetic mineralized materials

Nano Today 2025年 62卷

作者： Chen, Wei Ma, Yuanyuan Xu, Shiqing Wang, Yang Zhang, Pengchao Meng, Jingxin Fu, Zhengyi Wang, Shutao CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China University of Chinese Academy of Sciences Beijing100049 China

Nacre-mimetic mineralized (NMM) materials with outstanding mechanical properties have been considered as future structural materials. However, replicating nacre's characteristics into artificial ones in mild conditions has been challenging, particularly in controlling the platelet size, which is crucial for mechanical performance. Here, inspired by mollusk biomineralization, we achieve the unprecedented regulation of aragonite platelet sizes (ranging from 76 to 5800 μm2) at the micrometer scale by manipulating amorphous nano calcium carbonate content, thereby enhancing the mechanical properties of NMM materials. Experimental and simulation results demonstrate that merely decreasing the aragonite platelets' sizes can significantly increase the flexural strength and modulus by 2.8 and 9.9 times, respectively. Notably, the proposed strategy not only has the potential for large-scale production but also produces refined NMM material that closely resembles natural nacre in terms of microstructure and mechanical properties, showing ca. 26 % improvement in specific strength over previously reported NMM materials. Consequently, this work provides a feasible way for developing advanced biomimetic structural materials with specific functions, such as protective gear and artificial bone grafts. © 2025 Elsevier Ltd

关键词： Biomimetic mineralization Mechanical property Nacre-mimetic materials Platelet size

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Intrinsic ion migration-induced susceptible two-dimensional phase-transition memristor with ultralow power consumption

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Science Bulletin 2025年

作者： Qin, Lanhao Yu, Yimeng Fang, Cheng Liu, Yujie Zhu, Kaichen Ouyang, Decai Liu, Shenghong Song, Bailing Zhou, Ruochen Lanza, Mario Hu, Wenhua Wu, Jinsong Li, Yuan Zhai, Tianyou State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Center of Hydrogen Science State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Innovation Center for Future Materials Shanghai Jiao Tong University Shanghai200240 China Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia School of Computer Science and Artificial Intelligence Wuhan University of Technology Wuhan430070 China

Two-dimensional (2D) phase-transition memristors have demonstrated transformative potential for neuromorphic computing, yet challenges like high power consumption, limited endurance, and crystal damage from external ion intercalation persist. Here, we introduce a novel 2D phase-transition memristor leveraging a paradigm-shifting mechanism by exploiting the ultrafast intrinsic Cu+ ion migration within Cu2S. This approach eliminates the need for external ion insertion, significantly reducing crystal damage and enabling exceptional cycling stability with over 400 DC cycles and 500 pulse cycles. The susceptible monoclinic-tetragonal phase-transition induced by intrinsic Cu+ migration achieves an unprecedented SET power consumption of 1 μW at 100 mV, significantly lower in currently reported phase-transition memristors. To further demonstrate the potential of intrinsic ion migration-induced (IIM) memristor, we simulated an IIM memristor crossbar array for image preprocessing in gesture recognition with a high SSIM value of 0.94, showcasing its potential for scalable neuromorphic hardware. This work establishes a new paradigm in low-power, high-performance phase-transition memristors, advancing their practical application in next-generation computing. © 2025 Science China Press

关键词： Memristor Neuromorphic device Two-dimensional materials

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Microstructure evolution of 7050 aluminum forgings during surface cumulative plastic deformation

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 45-59页

作者： Jian-liang HU Ze-xiong ZHANG Cheng XING Xiu-jiang WU Shi-quan HUANG Hong BO Key Laboratory of Advanced Forging&Stamping Technology and Science Ministry of EducationYanshan UniversityQinhuangdao 066004China State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South UniversityChangsha 410083China College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China Hebei Engineering Technology Research Center of Metal Precision Plastic Processing Yanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

To elucidate the mechanisms of regulating the microstructure uniformity in 7050 aluminum forgings through surface cumulative plastic deformation(SCPD),the microstructure under different solution treatments was investigated using metallographic observation(OM),electron backscatter diffraction(EBSD),transmission electron microscopy(TEM),and X-ray diffraction(XRD).The findings demonstrate that the most uniform microstructure in the forgings is achieved with a solution treatment at 470℃for 30 *** SCPD process generates a significant number of needle-shaped precipitates,resulting in a higher dislocation density and stored *** treatments alleviate the pinning effect of second-phase particles and facilitate static recrystallization(SRX)in forgings,leading to a reduction in grain ***,mechanical testing results demonstrate 7%−13%increase in tensile strength and more uniform elongation of the forgings in different directions.

关键词： microstructure homogeneity surface cumulative plastic deformation(SCPD) static recrystallization(SRX) dislocation density

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Tristate ferroelectric memory in PZT-based films from antiferroelectric-ferroelectric phase transition

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Ceramics International 2025年

作者： Liu, Yifei Hu, Yang Zhang, Huazhang Wang, Zhiqing Shen, Jie Wu, Zhi Chen, Wen Zhou, Jing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park Wuhan University of Technology Hainan 572000 China School of Physics and Mechanics Wuhan University of Technology Wuhan430070 China School of Materials and Engineering Hunan Institute of Technology Hengyang421002 China

Ferroelectric random access memory (FeRAM) plays a vital role in information storage due to its unique advantages, driving the demand for high-capacity and high-density solutions. In this paper, a series of PbZr1-xTixO3 (x = 6 %, 8 %, 10 %, 12 %, 14 %) films were prepared using sol-gel and spin-coating methods. As the Ti content increases, the enhancement effect of the ferroelectric order is reflected structurally in XRD and Raman spectra, and electrically in the dielectric and ferroelectric properties. Notably, for x = 12 %, the P-E hysteresis loop exhibits slightly pinched and double-like, and the peaks of the I-V curve are split on both the positive and negative field sides. This ferroelectric behavior is caused by an underlying triple-well free-energy landscape, which is the basis of tristate ferroelectric memory. The measurement results show that the "±1" and "0" states of PbZr0.88Ti0.12O3 film under electric field cycling exhibit excellent programmability. It also achieves promising data retention up to 1000s and endurance up to 107 cycles. This investigation not only verifies the feasibility of applying tristate ferroelectric memory to PZT-based films but also provides a facile method for fabricating tristate ferroelectric memory devices. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Tristate ferroelectric memory Antiferroelectric Ferroelectric Phase transition PZT

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Synergistic effect of bimodal-sized SiC p and a dynamically precipitated Mg 17 Al 12 phase on microstructure and mechanical properties of SiC p /AZ61 composites during hot extrusion process at different extrusion temperatures

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Journal of materials Research and technology 2025年 36卷 6695-6706页

作者： Ming Li Gang Li Mengling Yao Dijia Zhao Jianxin Zhou Shulin Lü Yajun Yin Xiaoyuan Ji Qiang Chen Hongxia Wang State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 PR China Southwest Technology and Engineering Research Institute Chongqing 400039 PR China Shanxi Key Laboratory of Advanced Magnesium Based Materials School of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 PR China

To clarify the synergistic effect of bimodally sized (6 vol% micro-sized and 1 vol% nano-sized) SiC particles and a dynamically precipitated Mg 17 Al 12 phase on the microstructure and mechanical properties of SiC p /AZ61 composites during the hot extrusion process, homogenized bimodally sized SiC p /AZ61 composites were extruded at different temperatures (280, 320, and 360 °C). After extrusion, the distribution of SiC p was transformed from a necklace-like arrangement in the as-cast state to a ribbon-like distribution along the direction of extrusion, which was beneficial for stimulating dynamic recrystallization and precipitation nucleation. The size of the dynamically recrystallized grains and the precipitated Mg 17 Al 12 phase, as well as the texture intensity of the composite, gradually increased with an increase in the extrusion temperature, while the fraction of dynamically precipitated Mg 17 Al 12 exhibited the opposite trend. The composite demonstrated optimal tensile strength at an extrusion temperature of 280 °C, characterized by a yield strength (YS) of 260 MPa, an ultimate tensile strength (UTS) of 320 MPa, and an elongation (EL) of 7.4 %. The high strength of the extruded composite was primarily attributed to the synergistic effects of fine-grained strengthening, Orowan strengthening and thermal mismatch strengthening; among these, fine-grained strengthening, and Orowan strengthening played a predominant role.

关键词： SiC p /AZ61 composite Bimodally sized reinforcing particles Dynamically precipitated phases Texture intensity Extrusion Strengthening mechanism

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IMU-Based Real-Time Biofeedback Wristband With Automatic Sensor-to-Segment Calibration for Arm Swing Training

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IEEE Sensors Journal 2025年第6期25卷 9780-9789页

作者： Fan, Bingfei Chen, Jie Tan, Chao Zhu, Yifeng Liu, Tao Li, Qingguo Cai, Shibo Jiang, Tianyu Zhejiang University of Technology College of Mechanical Engineering Hangzhou310023 China Zhejiang University State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical Engineering Hangzhou310027 China Queen's University Department of Mechanical and Materials Engineering KingstonONK7L 3N6 Canada Zhejiang University of Technology College of Mechanical Engineering The Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education and Zhejiang Province Hangzhou310023 China Chinese PLA General Hospital The Second Medical Center and National Clinical Research Center for Geriatric Diseases National Key Laboratory of Kidney Diseases Department of Rehabilitation Medicine Beijing100000 China

Arm swing during walking is significant as it enhances gait stability and reduces energy expenditure. Reduced arm swing in patients with Parkinson's disease (PD) or the elderly causes poor mobility and higher fall risk. This article develops an IMU-based real-time biofeedback wristband with an automatic sensor-to-segment calibration algorithm for arm swing training. The real-time algorithm detects key frames and calculates the sensor-to-segment alignment transformation, then monitors arm swing motion, and provides vibration feedback when insufficient arm swing is detected. Validation experiments were performed to assess the accuracies of arm swing angle, angular velocity estimations, and the effectiveness of real-time biofeedback. Seventeen subjects wore wristbands and optical markers on their arms while performing slow, normal, and fast walking on a treadmill. Arm swing angle, angular velocity, and range of motion were extracted with and without the proposed calibration method. An additional wristband manually aligned with the forearm was used for comparison and an optical motion capture (OMC) system was utilized for reference. For the proposed method with automatic calibration, the root-mean-square errors (RMSEs) of the estimated continuous swing angle and angular velocity were 2.1° and 12.8°/s, respectively, which were 46% and 58% of those estimated with the manually aligned wristband. In real-time feedback experiments, subjects exhibited a notable increase in arm swing amplitude given the stimulus from vibration feedback. The developed wristband could serve as an effective training and easy-to-use device, which has the potential for PD patients to increase their arm swing amplitude during walking. © 2001-2012 IEEE.

关键词： Biofeedback

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Edge supercurrent in Josephson junctions based on topological materials

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 1-12页

作者： Junjie Qi Chui-Zhen Chen Juntao Song Jie Liu Ke He Qing-Feng Sun X.C.Xie Beijing Academy of Quantum Information Sciences Beijing 100193China School of Physical Science and Technology Soochow UniversitySuzhou 215006China Institute for Advanced Study Soochow UniversitySuzhou 215006China College of Physics and Hebei Advanced Thin Films Laboratory Hebei Normal UniversityShijiazhuang 050024China School of Physics Xi’an Jiaotong UniversityMinistry of Education Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed MatterXi’an 710049China State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China Hefei National Laboratory Hefei 230088China International Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China Interdisciplinary Center for Theoretical Physics and Information Sciences Fudan UniversityShanghai 200433China

The interplay between novel topological states and superconductivity has garnered substantial interest due to its potential for topological quantum *** Josephson effect serves as a useful probe for edge superconductivity in these hybrid topological *** Josephson junctions based on topological materials,supercurrents exhibit unique quantum interference patterns,including the conventional Fraunhofer oscillations,theΦ_(0)-periodic oscillation,and the 2Φ_(0)-periodic oscillation in response to the external magnetic field(Φ_(0)=h/2e is the flux quantum,h the Planck constant,and e the electron charge).These interference patterns stem from varied Andreev reflection mechanisms and the associated current density *** review seeks to comprehensively examine the theoretical and experimental advancements in understanding the quantum interference patterns of edge supercurrents in Josephson junctions based on quantum spin Hall,quantum Hall,and quantum anomalous Hall systems.

关键词： quantum Hall effect quantum spin Hall effect quantum anomalous Hall effect Josephson junction edge supercurrent Andreev reflection

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Improvement of the regenerability and surface electronegativity of rectorite via magnetic modification

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Journal of Molecular Liquids 2025年 427卷

作者： Su, Dan Huang, Jingyi Zhang, Ge Gao, Jing Wen, Zhipan Wang, Yingru School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan430073 China State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan430200 China

In this study, the magnetic modification of rectorite was conducted to enhance its regenerability and surface electronegativity. When using the raw rectorite, the removal rate of ciprofloxacin was 78 % and the recovery rate was only 26 % after six regeneration cycles. However, with magnetized modified rectorite (M-REC), the removal rate of ciprofloxacin was 97 % and the recovery rate exceeded 75 %. The magnetic properties, easy magnetic separation and enhanced surface electronegativity of M-REC were confirmed through SEM, TEM, VSM, XRD, BET and XPS characterization. After six regeneration recycles, the basic skeleton structure of M-REC remained largely unchanged, indicating that has excellent stability. Additionally, the adsorption kinetics and thermodynamics of M-REC were investigated, and the Langmuir model accurately described the adsorption isotherm. The adsorption kinetics data fit the pseudo-second order models. The adsorption rate was determined by the number of available adsorption sites on the M-REC surface, and the removal process was primarily driven by chemisorption. Therefore, M-REC is an environmentally friendly adsorption material with potential applications in environmental remediation. © 2025

关键词： Adsorption isotherms

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Fabrication and characterization of GCF/PyC composites by TG-CVI densified porous glassy carbon preform

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Ceramics International 2025年

作者： Jia, Jiangang You, Xinya Pan, Zikang Zhang, Hongqiang Xiao, Yang Yuan, Zhongtian Liu, Diqiang Guo, Tieming State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou730050 China School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China

Carbon foams with adjustable three-dimensional architecture are obtained by template method. This paper describes the effects of template content impact on the porous framework, microstructure and mechanical properties of glassy carbon foams. Then a serious of glassy carbon foam/pyrocarbon (GCF/PyC) composites were fabricated by thermal gradient chemical vapor deposition (TG-CVI) using glassy carbon foam with different porosity as preform. After densification, bulk density of glassy carbon foam was increased and defects in carbon foam framework were repaired, which contributes to mechanical properties and ensures higher thermal conductivity. As the porosity increases, compressive strength of carbon foam gradually decreases from 83.03 MPa to 24.52 MPa. The compressive and flexural strengths of obtained GCF/PyC composites first increased and reached the peak values, then decreased. The maximum compressive and flexural strengths of GCF1/1-C are measured to be 120.5 MPa and 92.21 MPa, which are 135 % and 267 % higher than that of carbon foam GCF1/1. The thermal conductivity of carbon foam decreases from 1.22 W/m·K to 0.75 W/m·K with the porosity increase. For GCF/PyC composites, thermal conductivity first increases to 4.41 W/m·K then decrease, and GCF2/1-C has lowest thermal conductivity of 3.26 W/m·K among all GCF/PyC samples, which is 160 % higher than that of GCF2/1 before densification. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Glassy carbon

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Research on the burst failure analysis method of type IV cylinders based on the fiber strength reduction effect

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Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica 2025年第5期42卷 2567-2582页

作者： Li, Ruiqi Hu, Haixiao Li, Shuxin Chen, Hongda Cao, Dongfeng Liu, Hao Zheng, Kaidong Zhang, Yu Liu, Rui State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China School of Science Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China General Research and Development Institute China FAW Co. Changchun130000 China

Composite material hydrogen storage cylinders are the most effective solution for high-pressure gaseous hydrogen storage. The carbon fiber fully wrapped plastic liner cylinder (Type IV cylinder) is the most important potential in the development of hydrogen storage. Accurately predicting the burst pressure and failure mode of type IV cylinders is basement for the lightweight design of these cylinders. Current burst failure prediction methods are developed base on traditional laminated structural models, where the influence of fiber bundles cross undulation that occurs during the helical winding process are not considered. This paper comprehensively investigated the influence of fiber bundles cross undulation on the fiber strength by combining numerical and experimental approaches, and a failure prediction method which takes into account of the strength knock-down effect was developed for type IV cylinders. The burst pressures and failure locations of three different types of IV cylinders were predicted and compared with the ones that predicted by traditional method which does not consider the strength knock-down effect. The physical bursting experiments were conducted, and the results validate that the numerical analysis method considering the strength knock-down effect can give more accurate prediction of the failure location and reduce the prediction error of the bursting pressure, the maximum error is reduced from +15.42% to +6.07%. © 2025 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

关键词： Convergence of numerical methods

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