检索结果-内蒙古大学图书馆

Synergistic Enhancement of Mechanical Properties and Electrical Conductivity of Immiscible Bimetal:A Case Study on W–Cu

引用

Engineering 2025年第3期46卷 224-235页

作者： Qixiang Duan Chao Hou Tielong Han Yurong Li Haibin Wang Xiaoyan Song Zuoren Nie Key Laboratory of Advanced Functional Materials Ministry of EducationCollege of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124China

Immiscible bimetal systems,of which tungsten–copper(W–Cu)is a typical representative,have crucial applications in fields requiring both mechanical and physical ***,it is a major challenge to determine how to give full play to the advantages of the two phases of the bimetal and achieve outstanding comprehensive *** this study,an ultrafine-grained W–Cu bimetal with spatially connected Cu and specific Wislands was fabricated through a designed powder-mixing process and subsequent rapid low-temperature *** prepared bimetal concurrently has a high yield strength,large plastic strain,and high electrical *** stress distribution and strain response of individual phases in different types of W–Cu bimetals under loading were quantified by means of a *** high yield strength of the reported bimetal results from the microstructure refinement and high contiguity of the grains in the W islands,which enhance the contribution of W to the total plastic deformation of the *** high electrical conductivity is attributed to the increased mean free path of the Cu and the reduced proportion of phase boundaries due to the specific phase combination of W islands and *** work provides new insight into modulating phase configuration in immiscible metallic composites to achieve high-level multi-objective properties.

关键词： Immiscible bimetal Phase configuration Mechanical property Electrical conductivity Strain response

来源：评论

学校读者我要写书评

暂无评论

Constructing in-situ polymerized electrolyte for room-temperature solid-state chloride ion battery with enhanced electrochemical performance

引用

材料科学技术（英文版） 2025年第3期206卷 185-192页

作者： Yuling Xu Tiantian Zhu Haiyang Xu Xiangyu Zhao State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu Collaborative Innovation Center for Advanced Inorganic Functional CompositesCollege of Materials Science and EngineeringNanjing Tech UniversityNanjing211816China

Considering large volume variation and dissolution issues of some promising electrode materials for chloride ion batteries(CIB),the construction of solid polymer electrolytes(SPE)for efficient chloride ion transport is ***,this is hindered by low ionic conductivity of chloride SPEs and poor cycling performance of ***,an in-situ polymerized and cross-linked poly(ethylene gly-col)diacrylate-based chloride SPE with a low plasticizer content of succinonitrile is designed,yielding a room-temperature ionic conductivity of 7.6 × 10-5 S cm-1,which is higher than that of previously re-ported SPEs for ***,the use of the as-prepared SPE achieves an integrated organic cathode with significantly enhanced rate performance and capacity retention of 96.1％after 100 cycles at room temperature,which is much higher than 49.9％(80 cycles)of the cathode in the CIB with a sandwiched *** improved properties are also superior to that of other reported cathodes coupled with different chloride *** chloride ion transfer mechanism of the cathode is revealed by X-ray photo-electron spectroscopy and energy dispersive spectroscopy.

关键词： Chloride ion batteries Polymer electrolytes Poly(ethylene glycol)diacrylate Ionic conductivity Integrated cathode Cycling stability

来源：评论

学校读者我要写书评

暂无评论

Melt-blending synthesis of v-GO/PCS precursor for deriving thermostable and microwave-absorbing rGO/SiC fibers

引用

Ceramics International 2025年第13期51卷 17138-17147页

作者： Liu, Tao Han, Cheng Wu, Xiaohan Wang, Yongjun Ou, Yucheng Zhang, Songhe Song, Quzhi Zhang, Xiaoshan Wang, Shanshan Wang, Yingde Science and Technology on Advanced Ceramic Fibers and Composites Laboratory College of Aerospace Science and Engineering National University of Defense Technology Changsha410073 China

Silicon carbide (SiC) fiber is considered an excellent reinforcement for high-temperature microwave-absorbing composites. Embedding graphene (Gr) to SiC monolithic ceramics has been proven to be a notable enhancement in both mechanical and microwave-absorbing properties. However, achieving homogeneous dispersion of Gr within SiC fibers remains a formidable challenge. Herein, we proposed a melt blending strategy without solution to prepare homogeneous-dispersed vinyl-bridged graphene oxide/polycarbosilane (v-GO/PCS) precursor. Subsequently, rGO/SiC fibers were fabricated using the polymer-derived ceramic (PDC) method. The distinctively wrinkled structure of rGO interlocks with the SiC fiber matrix, reinforcing the pulling-out and bridging mechanisms during the fiber fracture process, leading to a 36 % increase in the tensile strength of the 0.1%-rGO/SiC (as-received) fibers compared to the 0%-rGO/SiC (as-received) fibers. Moreover, rGO effectively stabilizes the amorphous SiCxOy and inhibits the rapid growth of SiC grains under high temperatures, resulting in a notable strength retention rate of 64 % for 0.1%-rGO/SiC fibers after 1600oC-treatment. The reflection loss (RL) value of as-received 0.1%-rGO/SiC fibers reaches a minimum of −42.6 dB at 11.9 GHz, with an effective absorption bandwidth of 2.2 GHz (10.2–12.4 GHz). The results indicate that the melt blending strategy for uniformly embedding rGO into SiC fiber effectively achieves synergistic improvement of thermal stability and microwave-absorbing properties. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Silicon carbide

来源：评论

学校读者我要写书评

暂无评论

Machine learning-driven insights into biaxial strain-induced anomalous thermal conductivity enhancement of boron arsenide

引用

science China Technological sciences 2025年第5期68卷 5-18页

作者： Yikun LIU Yurong HE Tianqi TANG Jiaqi ZHU School of Energy Science and Engineering Harbin Institute of Technology Zhengzhou Research Institute Harbin Institute of Technology Heilongjiang Key Laboratory of New Energy Storage Materials and Processes National Key Laboratory of Science and Technology on Advanced Composites in Special Environments

Boron arsenide(BAs) is a promising integrated circuit thermal management material with ultra-high thermal conductivity(κ) and exceptional semiconductor properties. In practical devices, mechanical stress and strain caused by thermal expansion inevitably affect the thermodynamic properties of heat sink materials. Consequently, investigation of the effects of stress and strain on the κ of BAs is essential. Accurate assessment and regulation of the κ and phonon heat transport of BAs requires consideration of both three-phonon(3ph) and four-phonon(4ph) interactions. However, anharmonicity computation using density functional theory is computationally expensive, particularly for the fourth-order interatomic force constants. This work uses a machine learning-driven moment tensor potential method to evaluate higher-order anharmonicity and extends it to include fourth-order forces, accelerating the calculations significantly. Results show that the κ of BAs calculated using the moment tensor potential method when considering both 3ph and 4ph processes agrees well with experimental data. In contrast,considering the 3ph interaction alone causes κ to be overestimated. The machine learning approach reduces computational costs by approximately 94% while maintaining comparable accuracy to density functional theory. By solving the phonon Boltzmann transport equation, the thermal transport properties of BAs under biaxial tensile strains ranging up to 7% are evaluated. BAs shows an anomalous κ enhancement when including both 3ph and 4ph interactions, with a maximum enhancement of 15% at a small strain of 1%, primarily because of the weakening of the 3ph scattering. Beyond 2% strain, both the 3ph and 4ph scattering rates increase significantly, causing shorter phonon lifetimes and a monotonic reduction in κ. Additionally, the κ temperature dependence under strain is explored, highlighting temperature's role in modulating phonon scattering. This study provides machine learning-driven i

关键词： boron arsenide machine learning potential biaxial strain thermal conductivity enhancement phonon transport

来源：评论

学校读者我要写书评

暂无评论

Ultralight and superelastic MXene/reduced graphene oxide aerogels for electromagnetic interference shielding

引用

Nano Research 2025年第1期18卷 1-9页

作者： Xinfeng Zhou Yang Dai Guoyao Yue Yiman Zhang Lulu Li Zhong-Zhen Yu Peng Min Hao-Bin Zhang State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Advanced Functional Polymer Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Present address:BOE Technology Innovation Center BOE Technology Group Co.Ltd.Beijing 100176China Xi’an Modern Chemistry Research Institute Xi’an 710065China

Lightweight aerogels feature multifunctionality and a high porosity,yet accompanied with poor structure recovery under large strain *** this work,we develop an air bubble-ice crystal dual template and annealing strategy to integrate low density and high resilience for the conductive transition metal carbides/nitrides(MXene)composite *** air bubbles and ice crystals synergistically exclude the nanosheets to the gas-liquid interfaces,thereby constructing unique Y-shaped junctions and robust *** annealing process greatly enhances the interlayer *** external load,the Yshaped structures prevent the stress concentration at the junctions by transferring the forces to the skeleton for maintaining structural *** addition,the wrinkled and thick cell walls,together with the enhanced interlayer interactions,endow the aerogel with exceptional structural stability and *** a result,the MXene/reduced graphene oxide(RGO)composite aerogels exhibit superelasticity with reversible compressive strains of up to 95%.In addition,the electron bridging effect of the RGO sheets affords the aerogel to deliver excellent electromagnetic interference shielding performance,as high as 46.3 dB at 2.5 ***,the remarkable reshapeability of the aerogels allows for precise regulation of structure and performance(33.5-75.1 dB)by a simple wetting compression *** summary,this work offers helpful inspirations for developing lightweight and superelasticity aerogels for extensive applications.

关键词： lightweight superelasticity MXene aerogel electromagnetic interference shielding reshapeability

来源：评论

学校读者我要写书评

暂无评论

Multifunctional Nacre‑Like Nanocomposite Papers for Electromagnetic Interference Shielding via Heterocyclic Aramid/MXene Template‑Assisted In‑Situ Polypyrrole Assembly

引用

Nano-Micro Letters 2025年第3期17卷 37-54页

作者： Jinhua Xiong Xu Zhao Zonglin Liu He Chen Qian Yan Huanxin Lian Yunxiang Chen Qingyu Peng Xiaodong He National Key Laboratory of Science and Technology On Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080People’s Republic of China

Robust, ultra-flexible, and multifunctional MXene-basedelectromagnetic interference (EMI) shielding nanocomposite filmsexhibit enormous potential for applications in artificial intelligence,wireless telecommunication, and portable/wearable electronic *** this work, a nacre-inspired multifunctional heterocyclic aramid(HA)/MXene@polypyrrole (PPy) (HMP) nanocomposite paper withlarge-scale, high strength, super toughness, and excellent tolerance tocomplex conditions is fabricated through the strategy of HA/MXenehydrogel template-assisted in-situ assembly of PPy. Benefiting from the"brick-and-mortar" layered structure and the strong hydrogen-bondinginteractions among MXene, HA, and PPy, the paper exhibits remarkable mechanical performances, including high tensile strength (309.7 MPa),outstanding toughness (57.6 MJ m−3), exceptional foldability, and structural stability against ultrasonication. By using the template effect ofHA/MXene to guide the assembly of conductive polymers, the synthesized paper obtains excellent electronic conductivity. More importantly,the highly continuous conductive path enables the nanocomposite paper to achieve a splendid EMI shielding effectiveness (EMI SE) of 54.1 dBat an ultra-thin thickness (25.4 μm) and a high specific EMI SE of 17,204.7 dB cm2g−1. In addition, the papers also have excellent applicationsin electromagnetic protection, electro-/photothermal de-icing, thermal therapy, and fire safety. These findings broaden the ideas for developinghigh-performance and multifunctional MXene-based films with enormous application potential in EMI shielding and thermal management.

关键词： MXene Remarkable mechanical properties Heterocyclic aramid Electromagnetic interference shielding Polypyrrole Multifunctionality

来源：评论

学校读者我要写书评

暂无评论

A facile data-driven battery capacity estimation framework for on-road plug-in hybrid electric vehicle

引用

Progress in Natural science:Materials International 2025年第1期35卷 166-176页

作者： Jianlu Li Yanming Chen Tongxing Lei Jianguo Liu Guizheng Liu Zhaoyang Deng Xuebiao Wu Zhiyu Ding Yinghe Zhang Junwei Wu Yanan Chen Guangzhou Automobile Group Co. Ltd. School of Materials Science and Engineering Harbin Institute of Technology School of Materials and Environmental Engineering Shenzhen Polytechnic University School of Science Shenzhen Key Laboratory of Flexible Printed Electronics Technology Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application Harbin Institute of Technology School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin Key Laboratory of Composite and Functional Materials Tianjin University

A data-driven framework with strong generalization capabilities is proposed to effectively extract features and easily access battery capacity. This framework can make highly accurate predictions for the battery capacities of plug-in electric vehicles. The feature extraction process is entirely based on statistics, which are always available and can be generalized to various types of battery data. An improved ampere-hour integral method can easily access battery capacity with just short-charging segments lasting 500 s. Several machine-learning models are trained to verify the framework's effectiveness, with the best model achieving a test error of 0.84 % based on leave-one-out validation. SHAP values are used to provide a reasonable interpretation of the relationships between the constructed features and model outputs. The proposed framework offers advantages such as reduced computational resources, wide generalization, and high prediction accuracy, showing great potential for battery management.

关键词： Battery capacity estimation Data-driven framework Lithium-ion battery Machine learning Plug-in hybrid electric vehicle

来源：评论

学校读者我要写书评

暂无评论

Defect Engineering with Rational Dopants Modulation for High‑Temperature Energy Harvesting in Lead‑Free Piezoceramics

引用

Nano-Micro Letters 2025年第3期17卷 87-101页

作者： Kaibiao Xi Jianzhe Guo Mupeng Zheng Mankang Zhu Yudong Hou Key Laboratory of Advanced Functional Materials Ministry of EducationCollege of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124People’s Republic of China

High temperature piezoelectric energy harvester(HTPEH)is an important solution to replace chemical battery to achieve independent power supply of HT wireless ***,simultaneously excellent performances,including high figure of merit(FOM),insulation resistivity(ρ)and depolarization temperature(Td)are indispensable but hard to achieve in lead-free piezoceramics,especially operating at 250°C has not been reported ***,well-balanced performances are achieved in BiFeO3–BaTiO3 ceramics via innovative defect engineering with respect to delicate manganese *** to the synergistic effect of enhancing electrostrictive coefficient by polarization configuration optimization,regulating iron ion oxidation state by high valence manganese ion and stabilizing domain orientation by defect dipole,comprehensive excellent electrical performances(Td=340°C,ρ250°C>10^(7)Ωcm and FOM_(250°C)=4905×10^(–15)m^(2)N^(−1))are realized at the solid solubility limit of manganese *** HT-PEHs assembled using the rationally designed piezoceramic can allow for fast charging of commercial electrolytic capacitor at 250°C with high energy conversion efficiency(η=11.43%).These characteristics demonstrate that defect engineering tailored BF-BT can satisfy high-end HT-PEHs requirements,paving a new way in developing selfpowered wireless sensors working in HT environments.

关键词： Lead-free piezoceramic Defect engineering Dopants modulation High-temperature Piezoelectric energy harvester

来源：评论

学校读者我要写书评

暂无评论

Microstructure,microchemistry,and micro-magnetism of dysprosium grain boundary diffused(Nd,Ce)-Fe-B magnets

引用

Journal of Rare Earths 2025年第3期43卷 556-568,I0005页

作者： Yifei Xiao Lele Zhang Tao Liu Qisong Sun Xiaolong Song Yikun Fang Anhua Li Minggang Zhu Wei Li Division of Functional Materials Central Iron and Steel Research InstituteBeijing 100081China Key Laboratory of Advanced Functional Materials Ministry of Education of ChinaCollege of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124China

The microstructure of(Nd,Ce)-Fe-B sintered magnets with different diffusion depths was characterized by a magnetic force microscope,and the relationship between the magnetic properties and the local structure of grain boundary diffused magnets is *** domains perpendicular to the c-axis(easy magnetization direction)show a typical maze-like pattern,while those parallel to the c-axis show the characte ristics of plate *** significant gradient change is shown in the concentration of Dy with the direction of diffusion from the surface to the *** diffuses along grain boundaries and(Dy,Nd)_(2)Fe_(14)B layer with a high anisotropy field formed around the *** in-situ electron probe micro-analysis/magnetic force microscopy(EPMA/MFM),it is found that the average domain width decreases,and the proportion of single domain grains increases as diffusion depth *** is caused by both the change of concentration and distribution of *** grain boundary diffusion process changes the microstructure and microchemistry inside the magnet,and these local magnetism differences can be reflected by the configuration of the magnetic domain structure.

关键词： Magnetic microstructures (Nd,Ce)-Fe-B Rare earths Magnetic force microscope Grain boundary diffusion process(GBDP) In-situ

来源：评论

学校读者我要写书评

暂无评论

Custom-assembled phase change modular devices for personalize speciality:Carbon energy thermal management application

引用

Nano Research 2025年第3期18卷 22-32页

作者： Yilin Chen Huitao Yu Yiyu Feng Wei Feng School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin 300350China Institute of Advanced Technology and Equipment Beijing University of Chemical TechnologyBeijing 100029China

In the context of 5G,the high-frequency cyclicity and inhomogeneity of heat flow put forward higher requirements for the thermal control system of electronic devices,and there is a great need for thermal management modules with fixed point and high efficiency to ensure the long-term development of electronic ***,we selected four phase change molecules with significant differences in phase change temperatures to be composited with graphene aerogel(GA)to obtain Ei@GA,Tetra@GA,Octa@GA,and 1,10-Deca@*** with pure phase change molecules,the thermal conductivity has been increased by more than 20%,and the relative enthalpic efficiency is as high as 98.7%or ***,we assembled the four phase change composites by“reduction welding”to obtain the integrated,modular thermal management device M1-PCMs@*** of inhomogeneous heat generation in electronics by building an inhomogeneous heat generation *** with the homogeneous modules M2-Ei@GA and M3-1,10-Deca@GA,the effective temperature control time of the customized module M1-PCMs@GA is extended by 100.0 and 394.3 s,***,custom-assembled modular thermal management devices have important application prospects in the field of intelligent temperature control of electronic devices,and the idea of cascade assembly enriches the application functions and development direction of intelligent thermal managers.

关键词： graphene aerogel phase change materials assembly customization modular thermal management devices

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：