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Highly toughened translucent glass matrix nanoceramics enhanced by amorphous Al_(2)O_(3)

Journal of Advanced Ceramics 2025年第2期14卷 199-208页

作者： Huasi Zhou Yang Liu Le Fu Håkan Engqvist Wei Xia Department of Engineering Science Uppsala UniversityUppsala 75121Sweden School of Material Science and Engineering Central South UniversityChangsha 410083China

The introduction of glass matrix ceramics in dental restorations has revolutionized dental aesthetics. A key challenge in the development of dental glass ceramics is achieving nanocrystalline glass ceramics with superior mechanical properties without compromising translucency. In this study, ZrO_(2)–SiO_(2) glass ceramics doped with amorphous Al_(2)O_(3) were investigated to address these requirements. The results indicate that the segregation of Al3+ at the grain boundaries of ZrO_(2) crystallites and the nano-domains of amorphous Al_(2)O_(3) significantly influences the microstructure, including the grain size and stabilization of tetragonal ZrO_(2), as well as the translucency and mechanical properties. The composition with 10 mol% Al_(2)O_(3) exhibits the highest toughness of 8.05 MPa∙m1/2 while maintaining excellent translucency. Moreover, the composition with 5 mol% Al_(2)O_(3) demonstrates lower translucency but achieves a high flexural strength of 960 MPa. Overall, the mechanical properties of these translucent glass matrix ceramics surpass those of commercially available dental glass ceramics, highlighting their potential for dental restoration applications.

关键词： dental restorative material nanocrystalline glass ceramics ZrO2-SiO2 translucency mechanical propertie

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Dual-compressed photoacoustic single-pixel imaging

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National science Review 2023年第1期10卷 187-195页

作者： Yuning Guo Baowen Li Xiaobo Yin Department of Mechanical Engineering University of Colorado Department of Material Science and Engineering Department of Physics Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Materials Science and Engineering Program University of Colorado

Photoacoustic imaging,an acoustic imaging modality with potentially optical resolution in an optical turbid medium,has attracted great ***,the convergence of wavefront optimization and raster scanning in computational photoacoustic imaging leads to the challenge of fast mapping,especially for a spatial resolution approaching the acoustic deep-subwavelength *** a sparse sampling paradigm,compressive sensing has been applied in numerous fields to accelerate data acquisition without significant quality *** this work,we propose a dual-compressed approach for photoacoustic surface tomography that enables high-efficiency imaging with 3D spatial resolution unlimited by the acoustics in a turbid *** dual-compressed photoacoustic imaging with single-pixel detection,enabled by spatially optical modulation with synchronized temporally photoacoustic coding,allows decoding of the fine optical information from the modulated acoustic signal even when the variance of original photoacoustic signals is *** perform a proof-of-principle numerical demonstration of dual-compressed photoacoustic imaging, that resolves acoustic sub-acoustic-wavelength details with a significantly reduced number of measurements,revealing the potential for dynamic *** dual-compressed concept,which transforms unobtrusive spatial difference into spatio-temporal detectable information,can be generalized to other imaging modalities to re alize efficient,high-spatial-resolution imaging.

关键词： photoacoustic imaging compressive sensing single-pixel imaging surface tomography

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Flexural strengthening of LWRC beams using RSHCC reinforced with glass fiber textile mesh

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Journal of engineering and Applied science 2024年第1期71卷 132页

作者： Issa, Mohamed E. El-Shafey, Nasser F. Baraghith, Ahmed T. Balat, Ehab N. Structural Engineering Department Faculty of Engineering Cairo University Cairo Egypt Structural Engineering Department Faculty of Engineering Tanta University Tanta Egypt Civil Engineering Department Faculty of Engineering Delta University for Science and Technology Gamasa Egypt

This study aims to explore the flexural behavior of crushed clay brick (CCB) lightweight concrete (LWC) beams strengthened with rubberized strain-hardening cementitious composite reinforced with glass fiber textile mesh layers (GFTM-RSHCC) at the tension side. For this purpose, an experimental investigation consisting of seven simply supported beams, including one un-strengthened specimen, was produced and tested using a monotonic 4-point loading scheme. All specimens had a 120 × 250 mm cross-section, a total length of 2400 mm, and a loaded span of 2200 mm. The studied parameters were the number of GFTM inside the RSHCC (1, 2, or 3) and the thickness of GFTM-RSHCC layer (30 or 40 mm). All the following aspects were tracked: crack pattern, ultimate load, mid-span defection, and ductility. The results show that increasing the number of layers of GFTM and the thickness of RSHCC generally leads to an increase in the ultimate loads and ductility, up to 68% and 83%, respectively, compared to the control beam. Finally, a proposed equation considering the contribution of the GFTM-RSHCC layer was developed to predict the flexural capacity of the strengthened beams. The proposed equation showed good agreement with the experimental results. © The Author(s) 2024.

关键词： Ductility

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Comparison between seismic analysis of twisting and regular 52-story towers considering soil-structure interaction

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Earthquake engineering and engineering Vibration 2024年第3期23卷 663-675页

作者： Mohamed Naguib Abouelsaad Mohammed Shaaban Salah El Bagalaty Mohamed E.El Madawy Structural Engineering Department Faculty of EngineeringMansura UniversityMansoura 35511Egypt Faculty of Engineering Delta University for Science and TechnologyGamasa 35712Egypt

A dynamic analysis of both twisting and regular towers is carried out to determine the results of considering soil-structure interaction(SSI)on high-rise *** addition,the difference between the seismic performance of using twisting towers over regular ones is *** twisting tower is a simulation of the Evolution Tower(Moscow).The towers’skeletons consist of RC elements and rest on a reinforced concrete piled-raft *** soil model is considered as multi-layered with the same soil properties as the zone chosen for the analysis(New Mansoura City,Egypt).The only difference between both towers is their shape in *** whole system is modelled and analyzed in a single step as one full 3D model,which is known as the direct approach in *** analyses are carried out using finite-element software(Midas GTS NX).Dynamic output responses due to three records of seismic loads are proposed and presented in some *** on the results,it is concluded that SSI has a considerable effect on the dynamic response of tall buildings mainly because of the foundation flexibility,as it leads to lengthening the vibration period,increasing the story drift and the base shear for both cases.

关键词： soil-structure interaction seismic analysis twisting towers base shear story drift finite element method Midas GTS NX

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Synchronous regulation of V_(2)O_(5) cathode and Zn anode using sodium gluconate as an additive for long-life aqueous zinc-ion batteries

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Journal of Energy Chemistry 2025年第4期103卷 703-713页

作者： Rongkun Sun Dan Luo Hongyang Zhou Zhaolong Zhang Yinuo Gao Siyuan Ma Zhi Li Xiaohong Kang Department of Materials Science and Engineering School of Physical Science and EngineeringBeijing Jiaotong UniversityBeijing 100044China Beijing Key Laboratory of Environmental Science and Engineering School of Material Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Aqueous zinc-ion batteries(AZIBs)are gaining attention owing to their affordability,high safety,and high energy density,making them a promising solution for large-scale energy ***,their performance is hampered by the instability of both the anode-electrolyte interface and the cathode-electrolyte *** use of sodium gluconate(SG),an organic sodium salt with multiple hydroxyl groups,as an electrolyte additive is *** and theoretical analyses demonstrate that Na^(+)from SG can intercalate and deintercalate within the associated V_(2)O_(5) cathode during in situ electrochemical *** action supports the layered structure of V_(2)O_(5),prevents structural collapse and phase transitions,and enhances Zn^(2+)diffusion ***,the gluconate anion disrupts the original Zn^(2+)solvation structure,mitigates water-induced side reactions,and suppresses Zn dendrite *** synchronous regulation of both the V_(2)O_(5) cathode and Zn anode by the SG additive leads to considerable performance ***‖Zn symmetric batteries demonstrate a cycle life exceeding 2800 h at 0.5 mA cm^(-2)and 1 mAh cm^(-2).In Zn‖V_(2)O_(5) full batteries,a high specific capacity of 288.92 mAh g^(-1)and capacity retention of 82.29%are maintained over 1000 cycles at a current density of 2 A g^(-1).This multifunctional additive strategy offers a new pathway for the practical application of AZIBs.

关键词： Aqueous zinc-ion batteries Sodium gluconate Vanadium oxides Zn anode Cycling stability High specific capacity

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Towards implementation of alloy-specific thermo-fluid modelling for laser powder-bed fusion of Mg alloys

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Journal of Magnesium and Alloys 2024年第6期12卷 2327-2344页

作者： Mohammad Hoseini-Athar Mikael Ersson Peter Hedström Department of Material Science and Engineering KTH Royal Institute of TechnologyStockholmSE-10044 Sweden

Multi-physics thermo-fluid modeling has been extensively used as an approach to understand melt pool dynamics and defect formation as well as optimizing the process-related parameters of laser powder-bed fusion(L-PBF).However,its capabilities for being implemented as a reliable tool for material design,where minor changes in material-related parameters must be accurately captured,is still in *** the present research,first,a thermo-fluid computational fluid dynamics(CFD)model is developed and validated against experimental *** the predicted material properties of the pure Mg and commercial ZK60 and WE43 Mg alloys,parametric studies are done attempting to elucidate how the difference in some of the material properties,i.e.,saturated vapor pressure,viscosity,and solidification range,can influence the melt pool *** is found that a higher saturated vapor pressure,associated with the ZK60 alloy,leads to a deeper unstable keyhole,increasing the keyhole-induced porosity and evaporation mass *** viscosity and wider solidification range can increase the non-uniformity of temperature and velocity distribution on the keyhole walls,resulting in increased keyhole instability and formation of ***,the WE43 alloy showed the best behavior in terms of defect formation and evaporation mass loss,providing theoretical support to the extensive use of this alloy in *** summary,this study suggests an approach to investigate the effect of materials-related parameters on L-PBF melting and solidification,which can be extremely helpful for future design of new alloys suitable for L-PBF.

关键词： Mg alloys Laser powder-bed fusion(L-PBF) Melt pool dynamics Computational fluid dynamics Fluid flow

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Texture development and surface reconstruction of BiVO_(4)photoanode via one-pot hydrothermal reaction for enhanced photoelectrochemical water splitting

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Journal of Advanced Ceramics 2025年第3期14卷 133-141页

作者： Sung Won Hwang Yoo Jae Jeong Runfa Tan Indhujasri Saravanan Hyun Soo Han Dong Hoe Kim In Sun Cho Department of Energy Systems Research Ajou UniversitySuwon 16499Republic of Korea Department of Material Science&Engineering Ajou UniversitySuwon 16499Republic of Korea Department of Mechanical Engineering Stanford UniversityStanford 94305USA Department of Material Science&Engineering Korea UniversitySeoul 02841Republic of Korea Materials Science and Engineering Program University of Colorado BoulderBoulder 80303USA

The simultaneous optimization of the bulk and surface characteristics of photoelectrodes is essential to maximize their photoelectrochemical(PEC)*** report a novel one-pot hydrothermal synthesis of textured and surface-reconstructed BiVO_(4)photoanodes(ts-BVO),achieving significant improvements in PEC water *** controlling precursor molarity and ethylene glycol(EG)addition,we developed a stepwise dual reaction(SDR)mechanism,which enables simultaneous bulk texture development and surface *** optimized CoBi/ts-BVO photoanode exhibited a photocurrent density of 4.3 mA∙cm^(−2)at 1.23 V *** hydrogen electrode(RHE)with a high Faradaic efficiency of 98%under one sun *** with nontextured BiVO_(4),the charge transport efficiency increased from 8%to 70%,whereas the surface charge transfer efficiency improved from 9%to 85%.These results underscore the critical role of both bulk and surface engineering in enhancing PEC *** findings offer a streamlined approach for improving the intrinsic properties of photoanodes in solar water splitting.

关键词： BiVO_(4) hydrothermal texture surface reconstruction ethylene glycol(EG) photoelectrochemical water splitting

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High-pressure synthesis of in-filled and Se-substituted high-thermoelectric performance skutterudite

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Ceramics International 2025年第16期51卷 21246-21253页

作者： Zhang, Zhicheng Wang, Xin Jing, Qi Lv, Xiaoling Deng, Le Department of Material Science and Engineering Changchun University of Science and Technology Changchun130022 China

CoSb3, as a medium temperature semiconductor thermoelectric material, has attracted much attention due to the abundant adjustable space provided by the Sb12 icosahedral cage structure and its excellent carrier mobility. However, its high lattice thermal conductivity makes it difficult to achieve coupled optimization of thermoelectric performance, which hinders its widespread application. Our work employed a high-pressure and high-temperature (HPHT) synthesis method to introduce point defects through In filling and Se substitution. In conjunction with high-pressure quenching to induce abundant nanoparticles, grain boundaries, and dislocations, we achieved a low lattice thermal conductivity of 0.99 W m−1 K−1 at 723 K. In addition, theoretical calculations confirm that the In filling combined with Se substitution for Sb increases the energy bands at the Fermi level, significantly enhancing the electrical conductivity and density of states. This additional energy band enabled the In0.5Co4Sb11.95Se0.05 sample synthesized under a pressure of 1.5 GPa to achieve a high power factor of 42.07 μ W cm−1 K−2 and a large zT value of 1.25 was obtained at 723 K. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Grain boundaries

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Shape Optimization of Porous Electrode Batteries

Shape Optimization of Porous Electrode Batteries

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AIAA science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Bookwala, Murtaza Guibert, Alexandre T. R. Agnelli, Filippo Kim, H. Alicia Structural Engineering Department and Material Science and Engineering Department University of California San Diego San DiegoCA United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

Batteries are essential in various applications, including Electric Vertical Take-Off and Landing (eVTOL) vehicles, where performance, efficiency, and safety are paramount. However, the effects of battery shape and design on thermal management and overall efficiency remain underexplored. In this study, we present a computational framework for shape optimization of lithium-ion batteries with a focus on maximizing energy density. In this work, we model the battery electrochemistry using the Doyle Fuller Newman model, which has a homogenized domain of electrode active particles. In contrast to the common finite volume model, we develop a multiscale finite element model. The results are validated against the well-established finite volume solutions and then used to maximize energy storage and minimize ohmic losses using the level set topology optimization method. The sensitivities are obtained using the discrete adjoint method. To reduce the computational cost of the sensitivity calculations, we use a semi-symbolic approach to calculate the partial derivatives necessary for the adjoint method. Anumerical optimization study indicates that optimizing the separator shape, between the anode and the cathode, can improve the energy performance by at least 43%. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Shape optimization

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Three-dimensional lightweight melamine foams modified by MXene sheets and CoNi alloys towards multifunctional microwave absorption

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Nano Research 2025年第2期18卷 377-389页

作者： Nannan Wu Zhengying Shen Yitao Ma Zhizheng Wu Chuanxin Hou Sijie Guo Jian Tian Jiurong Liu School of Material Science and Engineering Shandong University of Science and TechnologyQingdao 266590China School of Mathematics and Systems Science Shandong University of Science and TechnologyQingdao 266590China School of Environmental and Material Engineering Yantai UniversityYantai 264005China Department of Chemical&Biomolecular Engineering University of TennesseeKnoxvilleTN 37996USA Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education and School of Materials Science and EngineeringShandong UniversityJinan 250061China

Taking the increasing issue of electromagnetic waves(EMW)pollution and the necessity for applications in extreme environments,there is a pressing requirement to create multifunctional microwave absorption materials(MAMs)to meet the current *** this work,we achieved the successful combination of MXene sheets and metal organic framework(MOFs)derived CoNi@C magnetic alloys onto the three dimensional(3D)melamine foam(MF)skeleton using vacuum impregnation and electrostatic self-assembly *** obtained MF@MXene/CoNi@C composite foams achieved outstanding MA performance,with an optimal reflection loss(RL)value of–24.1 dB and a maximum effective absorption bandwidth(EAB)of 6.88 GHz at a thickness of 1.68 mm,effectively covering the whole Ku *** superior MA performance is ascribed to the composite foams’multi-component architecture,distinctive 3D porous structure,and the synergistic impact of multiple loss ***,the MF@MXene/CoNi@C composite foams demonstrate exceptional photothermal conversion,thermal insulation,and infrared stealth capabilities,effectively coping with the demands of applications in extreme *** work serves as a valuable resource and source of inspiration for the development of lightweight broadband,multifunctional efficient MAMs.

关键词： multifunctional microwave absorption MXene thermal insulation infrared stealth

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