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Dynamic modeling of a three-dimensional braided composite thin plate considering braiding directions

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 123-138页

作者： Chentong GAO Huiyu SUN Jianping GU W.M.HUANG College of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology School of Materials Science and EngineeringNanjing Institute of TechnologyNanjing 211100China

Currently,there are a limited number of dynamic models available for braided composite plates with large overall motions,despite the incorporation of three-dimensional(3D)braided composites into rotating blade *** this paper,a dynamic model of 3D 4-directional braided composite thin plates considering braiding directions is *** on Kirchhoff's plate assumptions,the displacement variables of the plate are *** incorporating the braiding directions into the constitutive equation of the braided composites,the dynamic model of the plate considering braiding directions is *** effects of the speeds,braiding directions,and braided angles on the responses of the plate with fixed-axis rotation and translational motion,respectively,are *** paper presents a dynamic theory for calculating the deformation of 3D braided composite structures undergoing both translational and rotational *** also provides a simulation method for investigating the dynamic behavior of non-isotropic material plates in various applications.

关键词： three-dimensional(3D)braided composite braiding direction composite thin plate large overall motion dynamic model

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Enhancing performance of fullerene-based organic electrochemical transistors via side-chain engineering

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Nano Research 2025年第2期18卷 905-912页

作者： Wenxin Fang Zijie Li Chengdong Wang Xiaowei Zhao Junyu Li Gang Ye Fengwei Huo Li Qiu Yanxi Zhang Wei Huang Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Yunnan Key Laboratory of Electromagnetic Materials and Devices National Center for International Research on Photoelectric and Energy MaterialsSchool of Materials and EnergyYunnan UniversityKunming 650091China Sinopec Shanghai Research Institute of Petrochemical Technology Shanghai 201028China Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(NanjingTech)Nanjing 211800China Frontiers Science Center for Flexible Electronics MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UniversityXi'an 710072China

The performance of organic electrochemical transistors(OECTs)relies on the interaction between organic semiconductors and ***,hydrophilic ethylene glycol(EG)side chains are incorporated into organic semiconductors to improve the channel’s capacity to absorb ***,the EG substituted organic semiconductors tend to swell when immersed in aqueous electrolytes and exhibit microstructural changes induced by dopant *** our research,we introduce an alkyl spacer to create distance between the fullerene and EG *** approach is designed to reduce the negative effects of swelling and balance the ion and electron *** conducted an analysis of OECTs using four fullerene derivatives:no alkyl spacer,butyl,hexyl,and octyl *** OECTs based on fullerene derivatives with butyl and hexyl spacers exhibit enhanced transconductance(g_(m)=11.8 and 19.4 mS)compared to the ones without alkyl *** has also been observed that the butyl and hexyl spacers lead to a more than tenfold increase in volumetric *** increasing the alkyl spacer(octyl group)leads to no transistor *** study uncovers the relationship between alkyl spacers and the performance of OECTs based on fullerene *** will serve as a guideline for designing n-type small molecules for ***,we showcased the potential of utilizing OECTs based on these fullerene derivatives in cation sensing,which is promising for developing sweat sensors.

关键词： organic electrochemical transistors fullerene derivatives ethylene glycol side chains ion and electron conduction

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Wear-resistant HfCx film with infrared-visible compatible stealth property

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Ceramics International 2025年

作者： Zou, Gaopeng Wang, Qianqian Sheng, Ruixin Sun, Ligang Shao, Qiyue Zhang, Xuhai Jia, Zhe Shen, Baolong School of Materials and Engineering Jiangsu Key Laboratory for Advanced Metallic Materials Southeast University Nanjing211189 China School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of Technology Nanjing211167 China School of Science Harbin Institute of Technology Shenzhen518055 China

Ultra-high temperature ceramic films have offered a combination of low infrared emissivity and durability in extremely harsh environments. However, desired applications have been limited by high visible light reflectivity. Herein, a novel strategy, by adjusting C stoichiometry and energy input, is proposed to construct a HfC0.91 film consisted of HfC columnar nanograins with a width of 14.3 ± 0.4 nm and a-C phase at triple junctions, as well as exhibiting significantly increased surface roughness. The resulting microstructure simultaneously achieved excellent infrared-visible compatible stealth and tribo-mechanical properties. The infrared reflectivity/emissivity in the wavelength band of 8–14 μm is 0.9/0.1 primarily attributed to a reduction in lattice vibration absorption, while the low visible reflectivity (0.33) is mainly dominated by reduced plasma energy and enhanced multiple scattering absorption. Furthermore, the HfC0.91 film exhibited improved wear-resistance due to the self-lubricating properties of a-C phase. Thus, this work offers a new strategy for designing wear-resistant HfCx film with infrared-visible compatible stealth property for application in extreme thermo-mechanical service environments. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Multiple scattering

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Fabrication and characterization of mullite fiber-based porous ceramics with mixed fiber lengths for high-temperature gas filtration

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Ceramics International 2025年

作者： Zheng, Dazhi Zhu, Ruijian Hu, Yuwen Liang, Shiou Sun, Huiying Wang, Zengmei State Key Laboratory of Engineering Materials for Major Infrastructure Jiangsu Key Lab. of Construction Materials School of Materials Science and Engineering Southeast University Nanjing211189 China School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of Technology Nanjing211167 China

The emissions and particulate pollutants (PM) from industrialization and other human activities have become a significant threat to human health. Researchers have experimented with various fiber-bonded filters, but there are still relatively few products with good high-temperature resistance. In this paper, a fiber-bonded porous ceramic with high porosity was prepared by vacuum filtration combined with freeze-drying using two homemade mullite fibers with different length-to-diameter ratios as raw materials and mullite sol as binder. When the content of fine fibers is 40 %, the product has a better overall performance, its density is 0.63g/cm3, porosity is 74 %, strength is 0.77 MPa, thermal conductivity is 0.153 W m−1 K−1. When the airflow rate of 2 L/min, the pressure drop is 80 Pa, the filtration efficiency of about 99 %, the QF is 0.08 pa−1, The mullite fiber-bonded porous ceramics prepared through a simple process exhibit excellent filtration performance, offering a wide range of potential applications. © 2025

关键词： Thermal conductivity of gases

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Aging Precipitation Behavior of Cu-Nb Synergistic Strengthened Ferritic Stainless Steel

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JOM 2025年 1-11页

作者： Jiang, Mingkun Han, Ying Zhu, Weiwei Zu, Guoqing Sui, Qi Ran, Xu Key Laboratory of Advanced Structural Materials Ministry of Education Changchun University of Technology Changchun China School of Materials Science and Engineering Changchun University of Technology Changchun China Jilin Provincial Key Laboratory of Advanced Materials Processing and Application for Rail Transit Changchun University of Technology Changchun China

This study delves deeply into the aging precipitation behavior of Cu-Nb cooperatively strengthened ferritic stainless steel at 973.15 K. The results indicate that there are four types of Nb-bearing precipitates, namely (Fe, Cr, Si)2(Nb, Ti), (Nb, Ti)2C, (Nb, Ti)C and NbTiC2. The Nb-bearing precipitates located at the grain boundaries possess a smaller radius, a more compact distribution spacing and a greater quantity. The interface between Cu-bearing precipitates and matrix changes from coherent to incoherent with the change of crystal structure during ripening. The ripening rate of Nb-bearing precipitates is 45 times higher than that of Cu-bearing precipitates. The sharp position of the block-shaped Nb-bearing precipitates promotes the formation of new Nb-bearing precipitates, resulting in the feathery agglomeration of Nb-bearing precipitates. The high-strain field at the tip of the long diameter of Cu-bearing precipitates can also promote the precipitation of Nb-bearing precipitates, which results in the attachment of Nb-bearing and Cu-bearing precipitates.

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Rational design of high conductivity and robust associativity aluminum current collector based on polyaniline for lithium-ion battery

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materials Chemistry and Physics 2025年 342卷

作者： Jia, Yongqiang Zhang, Lingling Han, Maoyi Wang, Xunjie Shang, Yuxiang Hao, Zhendong Liu, Ti Wu, Mingfang Ba, Zhixin School of Materials Science and Engineering Jiangsu University of Science and Technology Jiangsu Zhenjiang212100 China School of Materials Science and Engineering Nanjing Institute of Technology Jiangsu Nanjing211167 China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of Technology Jiangsu Nanjing211167 China Jiangsu Dingsheng New Energy Materials Co. Ltd. China

The interfacial interaction between active electrode materials and current collectors is a cornerstone in defining the electrochemical efficacy of lithium-ion batteries. In this investigation, we have designed a high conductivity and robust associativity aluminum current collector, through integrating a novel network-crater structure into the surface of aluminum current collector by adopting a hybrid technique that combines chemical etching, with the electrochemical polymerization of conductive polyaniline (PANI) films. Of particular interest, when the electrochemical polymerization cycle is optimized to 5 (P/E-Al-5), the resultant structure exhibits augmented wettability and an extraordinary interfacial adhesive strength, with a peel value of 417.0 N/m. This augmentation is ascribed to the synergistic influence of mechanical interlocking and chemical bonding at the interface between the aluminum current collector and the LiFePO4 layers. Furthermore, the P/E-Al-5 current collector demonstrates commendable electrical conductivity, and the batteries incorporating this collector exhibit the least charge transport resistance. Consequently, the P/E-Al-5 current collector imparts enhanced electrochemical performance, distinguished by the highest rate capability and cycling stability. Impressively, at a high current rate of 5 C, the P/E-Al-5 collector manifests an average discharge capacity of 98.8 mAh g−1, a 59 % improvement over the unmodified aluminum sample (62.0 mAh g−1). Additionally, battery with the P/E-Al-5 current collector displays an elevated reversible discharge capacity, with a retention rate of 99.2 %. This study provides an inspiration for the design of high-performance aluminum current collector. © 2025

关键词： Covalent bonds

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Intelligent prediction and oriented design of high-hardness high-entropy ceramics

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Journal of materials Research and technology 2025年 36卷 6015-6023页

作者： Anzhe Wang Jicheng Liu Linwei Guo Kejie Qu Haishen Xie Yawei Li Bin Du School of Materials Science and Engineering Nanjing Institute of Technology Nanjing 211167 China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of Technology Nanjing 211167 China School of Physics and Materials Science Guangzhou University Guangzhou 510006 China Jointech Tooling & Moulding Technology Co. Ltd. Suzhou 215131 China State Key Laboratory of Advanced Refractories Wuhan University of Science and Technology Wuhan 430081 China

High-entropy ceramics are considered vital candidate materials for applications in rail transportation and advanced manufacturing due to their exceptional hardness and wear resistance. However, the intricate relationship between their composition and mechanical properties presents challenges for on-demand material design. This work utilizes machine learning and heuristic optimization algorithms to achieve accurate predictions of bulk high-entropy ceramics hardness (with validation set errors <10 %) and the oriented design of high-entropy ceramics with a hardness of 25 GPa (with an average error of 2.6 %). This achievement is attributed to three key innovations: the construction of the feature space based on the Pearson correlation coefficient and genetic algorithm, along with algorithm selection and optimization through hyperparameter tuning; the novel combination of reduced-dimensionality component compositions with atomic/precursor descriptors, achieving a model R 2 value of up to 0.898; the optimization of constituent elements using genetic algorithm and principal component analysis, providing direct guidance for the design of high-hardness high-entropy ceramics. Through these methodologies, new high-entropy ceramics compositions, typically represented by (Ti 0·25 Zr 0·25 Nb 0.25 Hf 0.25 )C, were successfully designed, achieving hardness of up to 23.9–25.2 GPa. This oriented design methodology holds promise for accelerating the on-demand design of high-entropy ceramics.

关键词： Machine learning High-entropy ceramics Hardness Mechanical properties prediction Oriented design

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Research progress on lithium extraction from salt-lake brine

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Journal of Industrial and Engineering Chemistry 2025年

作者： Deng, Yi Chai, Guoliang Zhang, Yinghe Carbon Materials Research and Comprehensive Application Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application School of Science Harbin Institute of Technology Shenzhen Shenzhen518055 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China

Extensive lithium reserves in aqueous environments such as salt-lake brines, subterranean brines, and seawater underscore the importance of brine extraction in current research. Addressing the lack of a systematic framework for categorizing brine extraction technologies, this review presents a classification based on phase interactions within brines, specifically liquid–liquid and liquid–solid interfaces. The liquid–liquid system includes precipitation methods using carbonates, aluminates, and phosphates, along with extraction techniques involving β-diketones, crown ethers, organophosphorus compounds, and ionic liquids. The liquid–solid system focuses on lithium-ion transport and material interactions, encompassing transmembrane transport mechanisms (e.g., nanofiltration, liquid membranes, electrodialysis), adsorption embedding (with aluminum, manganese, and titanium-based adsorbents, and electrochemical ion deintercalation), and adsorption adherence (featuring natural ores, ion-exchange resins, and carbon-based materials). The review outlines the core principles of these methods and highlights cutting-edge technologies in brine lithium extraction. By integrating various techniques, these advancements aim to enhance efficiency, cost-effectiveness, and environmental sustainability, significantly improving the feasibility of lithium extraction from brines and supporting the sustainable development of the global lithium supply chain. © 2025 The Korean Society of Industrial and Engineering Chemistry

关键词： Lakes

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Progress and Challenges in Microstructure and Properties of Borate Mineral Chambersite Nano-Mn3B7O13Cl: a Review

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Archives of Metallurgy and materials 2025年第1期70卷 59-70页

作者： Xiong, S. Nanjing Institute of Technology College of Materials Engineering Jiang Su Nanjing211167 China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Jiang Su Nanjing211167 China Jinling Institute of Technology College of Materials Engineering Jiang Su Nanjing211167 China University of Science and Technology Beijing School of Materials Science and Engineering Beijing100083 China

Borate mineral chambersite (Mn3B7O13Cl) is a kind of manganese-chloride-borate mineral with great application prospect. China is the only country has the borate mineral chambersite deposits in the world at present. It is of great theoretical and practical significance to develop and utilize raw Mn3B7O13Cl and synthetic nano- Mn3B7O13Cl, and study its microstructure and properties. This review provides an overview of the microstructure, photoluminescence, gamma ray irradiation and neutron irradiation properties, electromagnetic properties, anti-tumor, anti-bacterial properties, as well as friction and wear properties of Mn3B7O13Cl, which provides a theoretical basis for further development and application of Mn3B7O13Cl. © 2025. The Author(s).

关键词： Gamma rays

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Precipitation Behavior of Phases in a Novel Low-Cobalt Nickel-Based Superalloy

SSRN

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SSRN 2025年

作者： Ju, Jia Xue, Yuyang Chen, Jiayin Guo, Rui Shuai, Liguo Yan, Chen Zhang, Yue Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology School of Materials Science and Engineering Nanjing Institute of Technology Jiangsu211167 China Zhongtian Alloy Technology CO. LTD Nantong226010 China Helmholtz-Zentrum Hereon Max-Planck-Str.1 Geesthacht21502 Germany Southeast University China Helmholtz Center Hereon Germany

The phase precipitation behavior of a low-cobalt nickel-based superalloy was investigated using JMatPro simulations and differential scanning calorimetry (DSC). Microstructural and compositional analyses of the experimental ingot were compared with those of a control sample. The cast structure primarily comprises γ (matrix), γ', σ, μ phases, carbides (MC, M6C, M23C6), and a γ+γ' eutectic structure (with a volume fraction of approximately 13.9%). Ta and Hf exhibited positive segregation during solidification. The initial melting point, final melting point, and γ-phase remelting temperature of the alloy were determined to be 1300.1°C, 1349.6°C, and 1272.1°C, respectively. The theoretical calculations were in close agreement with the experimental findings. Thermodynamic analysis suggested that the precipitation amount and resolution temperature of γ' and M6C carbides could be enhanced by increasing the Al and W content, respectively. Furthermore, Hf and Ta were found to increase the liquid-phase evolution of MC carbides. The low-cobalt alloy demonstrated superior expected durability compared to existing commercial nickel-based polycrystalline cast superalloys. © 2025, The Authors. All rights reserved.

关键词： Cobalt alloys

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