检索结果-内蒙古大学图书馆

Synergistically Improved mechanical Properties and Thermal Conductivity of Hypoeutectic AlSiNiFeMg Alloy Prepared by Ultrasonic-assisted Casting

引用

Journal of Wuhan University of Technology(materials science) 2024年第6期39卷 1565-1568页

作者： ZHANG Wenda YUAN Xuan ZHOU Yuli ZHONG Gu BAI Peikang WANG Hongfu LIU Jun School of Materials Science and Engineering North University of ChinaTaiyuan 030051China Chinalco Materials Application Research Institute Co. Ltd.Suzhou BranchSuzhou 215026China Department of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Standard&Quality Control Research Institute Ministry of Water ResourcesHangzhou 310024China School of Mechanical Engineering North University of ChinaTaiyuan 030051China Delta Aluminum Corporation in Zhaoqing Zhaoqing 526029China

We employed a melt ultrasonic treatment near the liquidus to prepare a high-thermal-conductivity Al-4Si-2Ni-0.8Fe-0.4Mg *** influences of various ultrasonic powers on its microstructure,mechanical properties,and thermal conductivity were *** is shown that near-liquidus ultrasonication significantly refines the alloy grains and eutectic structure,synergistically improving the alloy’s mechanical properties and thermal ***,the grain size decreased by 84.5%from 941.4 to 186.2μ*** the ultrasonic power improved the thermal conductivity of the alloy slightly and significantly enhanced its mechanical *** an ultrasonic power of 2100 W,the tensile strength,yield strength,elongation rate,and thermal conductivity were 216 MPa,142 MPa,6.3%,and 169 W/(m·k),respectively.

关键词： Al-Si alloy mechanical property thermal conductivity ultrasonic treatment solidification microstructure

来源：评论

学校读者我要写书评

暂无评论

Grain-refining Co_(0.85)Se@CNT cathode catalyst with promoted Li_(2)O_(2)growth kinetics for lithium-oxygen batteries

引用

Chinese Chemical Letters 2024年第12期35卷 304-310页

作者： Ruonan Yang Jiajia Li Dongmei Zhang Xiuqi Zhang Xia Li Han Yu Zhanhu Guo Chuanxin Hou Gang Lian Feng Dang School of Materials Science&Engineering State Key Laboratory of Crystal MaterialsShandong UniversityJi’nan 250061China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon TyneNE18STUnited Kingdom School of Environmental and Material Engineering Yantai UniversityYantai 264005China

Highly active cathode catalysts for efficient formation/decomposition of Li_(2)O_(2)are essential for the performance improvement of lithium-oxygen batteries(LOBs).In this study,a grain-refining Co_(0.85)Se catalyst with a lattice spacing of 2.69 A of(101)plane closely matching with the(100)plane(2.72A)of Li_(2)O_(2)was applied for high-performance ***(101)plane exposed Co_(0.85)Se@CNT was synthesized by a simple one-pot hydrothermal *** Co_(0.85)Se with the lattice matching effect not only led to the efficient conversion and polarized growth of Li_(2)O_(2),but also prevented the formation of *** functional theory(DFT)calculations reveal that Co_(0.85)Se(101)plane has the intrinsic catalytic ability to generate/decompose Li_(2)O_(2)during ORR/OER process,due to its homogeneous electron distribution,suitable adsorption energy,and promoted Li_(2)O_(2)growth *** a consequence,the(101)plane highly exposed Co_(0.85)Se@CNT-80 electrode exhibited remarkable cycle stability over 2400 h at 100 mA/g and 290cycles at 500 mA/g,which is about 2 times longer than other electrodes.

关键词： Lithium-oxygen batteries Co_(0.85)Se@CNT Cathode catalysts Grain-refiner DFT calculation

来源：评论

学校读者我要写书评

暂无评论

COMPREHENSIVE REVIEW OF DIC AND XCT TECHNOLOGIES IN EVALUATING CONCRETE STRUCTURAL INTEGRITY AND DURABILITY

COMPREHENSIVE REVIEW OF DIC AND XCT TECHNOLOGIES IN EVALUATI...

引用

ASME 2024 International mechanical engineering Congress and Exposition, IMECE 2024

作者： Azari, Fatemeh Jazaei, Robabeh Department of Mechanical Engineering and Materials Science College of Engineering University of Pittsburgh PittsburghPA United States Department of Engineering College of Engineering and Science Slippery Rock University Slippery RockPA United States

ISBN: (纸本)9780791888612

The deteriorating concrete infrastructure in the U.S., notably highways and bridges, urgently needs attention. The department of Transportation and various assessments highlight a maintenance deficit exacerbating traffic congestion [1]. An investment of about $3.6 trillion [1,2] is required to rectify these issues and improve traffic flow, emphasizing the need for stronger, more durable composite materials for concrete [2].Recent advances in high-resolution optical imaging, especially X-ray Computed Tomography (CT), have become crucial in materials science [3]. CT imaging offers in-depth insights into the internal structure of concrete, essential for understanding crack development and propagation under environmental stresses like earthquakes [4]. This technology has transformed the assessment of concrete's mechanical properties, such as stress behaviors and deformation [4,5]. Improved CT imaging significantly enhances computational modeling, facilitating precise integration of geometric models into advanced finite element analysis software, thus improving the durability and longevity of concrete infrastructures [6, 7]. This paper provides a comprehensive review of the applications, progress, and limitations of CT imaging in concrete material analysis [6-8]. It underscores the significance of these imaging techniques in enhancing the structural performance of concrete, contributing to the resilience and sustainability of critical infrastructure systems [7-9]. This review aims to foster a deeper understanding of material behaviors and drive innovations in concrete technology. Copyright © 2024 by ASME.

关键词： Traffic congestion

来源：评论

学校读者我要写书评

暂无评论

Kinetic investigation of the energy storage process in graphene fiber supercapacitors:Unraveling mechanisms,fabrications,property manipulation,and wearable applications

引用

Carbon Energy 2025年第1期7卷 133-173页

作者： Juan Zhang Wenwen Liu Minzhi Du Qingli Xu Minren Hung Ruifang Xiang Meng Liao Xinhou Wang Bingjie Wang Aiping Yu Kun Zhang Key Laboratory of Textile Science and Technology(Donghua University) Ministry of EducationCollege of TextilesDonghua UniversityShanghaiChina Department of Chemical Engineering Waterloo Institute for NanotechnologyUniversity of WaterlooWaterlooONCanada Laboratory of Advanced Materials State Key Laboratory of Molecular Engineering of PolymersDepartment of Macromolecular ScienceFudan University2205 Songhu RdShanghai 200438China College of Mechanical Engineering Donghua UniversityShanghai 201620China

Graphene fiber supercapacitors(GFSCs)have garnered significant attention due to their exceptional features,including high power density,rapid charge/discharge rates,prolonged cycling durability,and versatile weaving ***,inherent challenges in graphene fibers(GFs),particularly the restricted ion-accessible specific surface area(SSA)and sluggish ion transport kinetics,hinder the achievement of optimal capacitance and rate *** existing reviews on GFSCs,a notable gap exists in thoroughly exploring the kinetics governing the energy storage process in *** review aims to address this gap by thoroughly analyzing the energy storage mechanism,fabrication methodologies,property manipulation,and wearable applications of *** theoretical analysis of the energy storage process,specific parameters in advanced GF fabrication methodologies are carefully summarized,which can be used to modulate nano/micro-structures,thereby enhancing energy storage *** particular,enhanced ion storage is realized by creating more ion-accessible SSA and introducing extra-capacitive components,while accelerated ion transport is achieved by shortening the transport channel length and improving the accessibility of electrolyte *** on the established structure-property relationship,several critical strategies for constructing optimal surface and structure profiles of GF electrodes are *** on the exceptional flexibility and wearability of GFSCs,the review further underscores their potential as foundational elements for constructing multifunctional e-textiles using conventional textile *** conclusion,this review provides insights into current challenges and suggests potential research directions for GFSCs.

关键词： fiber-shaped supercapacitor graphene ion storage ion transport wearable application

来源：评论

学校读者我要写书评

暂无评论

ADVANCEMENTS AND CHALLENGES IN SOFT TISSUE engineering: A COMPREHENSIVE REVIEW OF ADDITIVE MANUFACTURING TECHNOLOGIES

ADVANCEMENTS AND CHALLENGES IN SOFT TISSUE ENGINEERING: A CO...

引用

ASME 2024 International mechanical engineering Congress and Exposition, IMECE 2024

ISBN: (纸本)9780791888629

In contemporary biomedical innovation, Additive Manufacturing (AM) has been pivotal since the 1980s, crafting complex structures for bioengineering, biomedicine, and pharmacology [1]. Particularly in pharmacology, AM, notably through Stereolithography (SLA), has transformed drug delivery, enhanced dosage precision and advancing personalized therapies [2]. In tissue engineering, AM is crucial for bioprinting scaffolds and tissue constructs using bio-inks to mimic human tissues, facilitating significant advances in medical treatments [3].(i) Key techniques include SLA achieving 30-micrometer resolution [4-6], Fused Deposition Modeling (FDM) is an evolving drug delivery technique [9], and Powder Bed Fusion (PBF) 70% to 90% had minimal impact on osteogenesis when using a 700-μm pore size [41].(ii) Applications span tissue engineering with materials like PLA and PGA [16], achieving 97.2 ± 48.4 implant fit accuracy using MRI and CT scans [40-41]. Drug delivery systems, such as multi-layered tablets, enable sequential release [22]. Personalized medicine benefits from custom-made implants based on patient data [25]. (iii) Challenges include replicating intricate organ structures like the bladder and liver, ensuring vascularization, and integrating immune components [28]. Incorporating vascular endothelial growth factor (VEGF) into bioinks increases angiogenesis [31]. Material limitations and regulatory hurdles persist [34].(iv) Future directions focus on improving vascularization, immune integration, and personalized oncological treatments [37]. Continued research and technological innovations are essential for accurate tissue replication [40].(v) In conclusion, AM techniques like SLA and FDM revolutionize drug delivery and tissue bioprinting, marking a transformative period in biomedicine with significant potential for personalized medicine and regenerative therapies, promising breakthroughs in disease modeling and drug testing[41]. Copyright © 2024 by ASME.

关键词： Endothelial cells

来源：评论

学校读者我要写书评

暂无评论

Directly predicting N_(2) electroreduction reaction free energy using interpretable machine learning with non-DFT calculated features

引用

Journal of Energy Chemistry 2024年第10期97卷 139-148,I0004页

作者： Yaqin Zhang Yuhang Wang Ninggui Ma Jun Fan Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Center for Advanced Nuclear Safety and Sustainable Development City University of Hong KongHong Kong 9077China Department of Mechanical Engineering City University of Hong KongHong Kong 999077China

Electrocatalytic nitrogen reduction to ammonia has garnered significant attention with the blooming of single-atom catalysts(SACs),showcasing their potential for sustainable and energy-efficient ammonia ***,cost-effectively designing and screening efficient electrocatalysts remains a *** this study,we have successfully established interpretable machine learning(ML)models to evaluate the catalytic activity of SACs by directly and accurately predicting reaction Gibbs free *** models were trained using non-density functional theory(DFT)calculated features from a dataset comprising 90 graphene-supported *** results underscore the superior prediction accuracy of the gradient boosting regression(GBR)model for bothΔg(N_(2)→NNH)andΔG(NH_(2)→NH_(3)),boasting coefficient of determination(R^(2))score of 0.972 and 0.984,along with root mean square error(RMSE)of 0.051 and 0.085 eV,***,feature importance analysis elucidates that the high accuracy of GBR model stems from its adept capture of characteristics pertinent to the active center and coordination environment,unveilling the significance of elementary descriptors,with the colvalent radius playing a dominant ***,Shapley additive explanations(SHAP)analysis provides global and local interpretation of the working mechanism of the GBR *** analysis identifies that a pyrrole-type coordination(flag=0),d-orbitals with a moderate occupation(N_(d)=5),and a moderate difference in covalent radius(r_(TM-ave)near 140 pm)are conducive to achieving high ***,we extend the prediction of activity to more catalysts without additional DFT calculations,validating the reliability of our feature engineering,model training,and design *** findings not only highlight new opportunity for accelerating catalyst design using non-DFT calculated features,but also shed light on the working mechanism of"black box"ML ***,the model provides valuable g

关键词： Nitrogen reduction Single-atom catalyst Interpretable machine learning Graphene Non-DFT features

来源：评论

学校读者我要写书评

暂无评论

Phase decomposition behavior and its impact on mechanical properties in bulk nanostructured Cu-20 at.%Fe supersaturated solid solution

引用

Journal of materials science & Technology 2024年第18期185卷 207-220页

作者： Maowen Liu Ruixiao Zheng Hongxing Li Qiuming Wei Chaoli Ma Nobuhiro Tsuji Tianmushan Laboratory Yuhang DistrictHangzhou 311115China Research Institute for Frontier Science Beihang UniversityBeijing 100191China School of Materials Science and Engineering Beihang UniversityBeijing 100191China Department of Materials Science and Engineering Kyoto UniversityYoshida HonmachiSakyo-kuKyoto 606-8501Japan Department of Mechanical Engineering University of North Carolina at Charlotte9201 University City BoulevardCharlotteNC 28223-0001USA Elements Strategy Initiative for Structural Materials(ESISM) Kyoto UniversityYoshida HonmachiSakyo-kuKyoto 606-8501Japan

Extended solid solution of immiscible systems,achieved by extreme processing approaches,can be trans-formed into nanostructured composites via phase decomposition,which are drawing great research atten-tion for their excellent thermal stability and high *** we fabricated the supersaturated solid solution of Cu-20 at.%Fe,a typical immiscible alloy,in bulk state by high pressure torsion,which pro-vides a great freedom over powders for studying the microstructure evolution and mechanical properties in the process of the phase decomposition in immiscible *** found that in the Cu-Fe solid solu-tion,spinodal decomposition of the Fe phases took place at the initial stage of annealing through volume *** process gives rise to:(1)metastableγ-Fe particles in the Cu grains with coherent Fe/Cu interface,and(2)the more stableα-Fe phase at the grain *** process was accompanied by moving boundary reaction which first proceeded in the pattern of spinodal decomposition and then changed into classical nucleation-growth mode with the depletion of Fe atoms in *** resultant Cu-Fe nanocomposites were jointly strengthened by the ultrafine Cu andα-Fe grains according to the rule of mixture,including grain boundary strengthening and the hardening of nanoscaleγ-Fe precipitates in the Cu *** effects of different strengthening mechanisms were scrutinized and their contributions to mechanical properties were quantitatively *** work sheds light onto the opportunity of designing and fabricating nanostructured composites via phase decomposition in immiscible systems.

关键词： immiscible alloy high pressure torsion annealing phase decomposition mechanical property

来源：评论

学校读者我要写书评

暂无评论

Impact of Artificial Compressibility on the Numerical Solution of Incompressible Nanofluid Flow

引用

Computers, materials & Continua 2023年第3期74卷 5123-5139页

作者： Tohid Adibi Shams Forruque Ahmed Seyed Esmail Razavi Omid Adibi Irfan Anjum Badruddin Syed Javed Department of Mechanical Engineering University of BonabBonabIran Science and Math Program Asian University for WomenChattogram4000Bangladesh School of Mechanical Engineering University of TabrizTabrizIran Energy Management Group Energy and Environment Research CenterNiroo Research InstituteTehranIran Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha61421Saudi Arabia

The numerical solution of compressible flows has become more prevalent than that of incompressible *** the help of the artificial compressibility approach,incompressible flows can be solved numerically using the same methods as compressible *** artificial compressibility scheme is thus widely used to numerically solve incompressible Navier-Stokes *** numerical method highly depends on its accuracy and speed of *** the artificial compressibility approach is utilized in several numerical simulations,the effect of the compressibility factor on the accuracy of results and convergence speed has not been investigated for nanofluid flows in previous ***,this paper assesses the effect of this factor on the convergence speed and accuracy of results for various types of *** improve the stability and convergence speed of time discretizations,the fifth-order Runge-Kutta method is applied.A computer program has been written in FORTRAN to solve the discretized equations in different Reynolds and Grashof numbers for various *** results demonstrate that the artificial compressibility factor has a noticeable effect on the accuracy and convergence rate of the *** optimum artificial compressibility is found to be between 1 and *** findings can be utilized to enhance the performance of commercial numerical simulation tools,including ANSYS and COMSOL.

关键词： Navier-Stokes equations incompressible flow artificial compressibility convergence rate convection flow

来源：评论

学校读者我要写书评

暂无评论

ZnO/B-g-C3N4 Nanoplatelet/Nanosheet Heterostructures for the Electrochemical Detection of Metol in Real Sample Analysis

引用

ACS Applied Nano materials 2024年第2期7卷 2072-2085页

作者： Murugan, Ravikumar Hwa, Kuo-Yuan Santhan, Aravindan Ibrahim, Suriani Department of Molecular Science and Engineering National Taipei University of Technology Taipei10608 Taiwan Graduate Institute of Organic and Polymeric Materials National Taipei University of Technology Taipei10608 Taiwan Department of Mechanical Engineering Faculty of Engineering University of Malaya Kuala Lumpur50603 Malaysia

One of the most important organic molecules is metol [4-(methylamino)phenol sulfate], which finds extensive usage in various applications as a monochromatic material. People, plants, and animals are all affected by it, and it raises serious environmental concerns. Developing a straightforward, quick, affordable, sensitive, and hands-on technique for metol determination in water bodies is of the utmost importance in the current scenario. A low-cost fabrication strategy is presented in this work for the synthesis of a zinc oxide nanoplatelet (ZnO) embedded into boron-doped carbon nitride nanosheet materials (ZnO/2D-BCN) utilizing a high-performance electrochemical sensor. The quantitative and qualitative information about the nanostructure of ZnO/2D-BCN were systematically analyzed further by using standard spectroscopic techniques such as XPS, XRD, FT-IR, EDAX, and Raman spectroscopy. 2D-nonstructural was observed to have a nanoplatelet/nanosheet through FE-SEM and TEM. Furthermore, electrochemical sensors’ performance was analyzed by using cyclic and differential pulsed voltammetry techniques. The fabricated ZnO/2D-BCN has peculiar intrinsic structural features, both connectivity and characteristic synergistic effect of B-dopants 2D-structure, which perturb mass transport with highly efficient electrochemical pathways. In addition, the electrochemical sensors of metol and its electrocatalytic mechanism were scrutinized further, which confirmed a fast electron transfer event. The as-prepared ZnO/2D-BCN exposed superior sensing conclusion through LOD (8.6 nM) in a wide-ranging linear 0.039-1617 (μM) as well as a remarkable sensitivity of 0.804 μA μM-1 cm-2. Additionally, other sensing parameters such as remarkable repeatability, electrodes’ reproducibility, materials’ stability, and a remarkable selectivity toward metol have been performed. Furthermore, the practical feasibility of as-made ZnO/2D-BCN/GCE has been inspected with biological and environment samples such

关键词： Zinc oxide

来源：评论

学校读者我要写书评

暂无评论

High Density 3D Carbon Tube Nanoarray Electrode Boosting the Capacitance of Filter Capacitor

引用

Nano-Micro Letters 2024年第11期16卷 242-254页

作者： Gan Chen Fangming Han Huachun Ma Pei Li Ziyan Zhou Pengxiang Wang Xiaoyan Li Guowen Meng Bingqing Wei Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031People’s Republic of China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026People’s Republic of China Department of Mechanical Engineering University of DelawareNewarkDE 19716USA Mechano‑X Institute Applied Mechanics LaboratoryDepartment of Engineering MechanicsTsinghua UniversityBeijing 100084People’s Republic of China

Electric double-layer capacitors(EDLCs)with fast frequency response are regarded as small-scale alternatives to the commercial bulky aluminum electrolytic *** carbon-based nanoarray electrodes with precise alignment and smooth ion channels is crucial for enhancing EDLCs’***,controlling the density of macropore-dominated nanoarray electrodes poses challenges in boosting the capacitance of line-filtering ***,a simple technique to finely adjust the vertical-pore diameter and inter-spacing in three-dimensional nanoporous anodic aluminum oxide(3D-AAO)template is achieved,and 3D compactly arranged carbon tube(3D-CACT)nanoarrays are created as electrodes for symmetrical EDLCs using nanoporous 3D-AAO template-assisted chemical vapor deposition of *** 3D-CACT electrodes demonstrate a high surface area of 253.0 m^(2) g^(−1),a D/G band intensity ratio of 0.94,and a C/O atomic ratio of *** a result,the high-density 3D-CT nanoarray-based sandwich-type EDLCs demonstrate a record high specific areal capacitance of 3.23 mF cm^(-2) at 120 Hz and exceptional fast frequency response due to the vertically aligned and highly ordered nanoarray of closely packed CT *** 3D-CT nanoarray electrode-based EDLCs could serve as line filters in integrated circuits,aiding power system miniaturization.

关键词： Compactly arranged Three-dimensional carbon tube nanoarray Dimensional carbon tube nanoarray Fast frequency response Electric double-layer capacitors Layer capacitors AC line-filtering Filtering

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：