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Achieving excellent strength-ductility-superelasticity combination in high-porosity NiTiNb scaffolds via high-temperature annealing

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材料科学技术（英文版） 2025年第3期206卷 221-233页

作者： Wei Liu Yintao Zhang Binghao Wang Shifeng Liu Yan Wang Ling Zhang Liang Zhang Lai-Chang Zhang Weijie Lu Liqiang Wang State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi'an 710055China State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Affiliated Hospital of Youjiang Medical University for Nationalities Guangxi Health Commission Key Laboratory of Biomedical Materials ResearchBaise 533000China School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi'an 710055China International Joint Laboratory for Light Alloys(MOE) College of Materials Science and EngineeringChongqing UniversityChongqing 400045China Centre for Advanced Materials and Manufacturing School of EngineeringEdith Cowan University270 Joondalup DriveJoondalupPerth6027WAAustralia

Metallic scaffolds with lightweight,low elastic modulus,and high energy-absorbing capacity are widely utilized in industrial applications but usually require post-heat treatment to enhance their comprehen-sive mechanical ***,it is unclear how to utilize the impact of β-Nb on the surrounding matrix for NiTiNb ternary alloys to achieve strength-ductility-superelasticity ***,we pre-pared rhomboidal dodecahedral NiTiNb porous scaffolds with a porosity of 85.9％by additive ***,annealing treatment was employed to drastically reduce the phase transformation temperatures and expand the thermal ***,the 850 ℃ annealed scaffold exhibited exceeding double compressive strength of the as-built sample,with a remarkable improvement in ductil-ity and *** the microstructure perspective,high-temperature annealing caused a further eutectic reaction of the unmelted Nb particles with the NiTi matrix and the transformation of mesh-like β-Nb into dispersedly distributed spherical β-Nb *** microstructure evolution after defor-mation indicated that stress-induced martensitic transformation occurred in the matrix away from the NiTi-Nb eutectic region whereas almost no martensite formed nearby β-Nb *** probe tomog-raphy characterization revealed an element diffusion zone in several nanometers surrounding the β-Nb particle,where the substitution of Nb with Ti led to a higher Ni:Ti atomic ratio,lowering transforma-tion *** dynamics simulations illustrated that β-Nb particles can not only entangle dislocations internally,acting as reinforcements but also hinder the twin growth,contributing to strain *** work elucidates the influence of β-Nb particles on the deformation mechanism of the NiTi-Nb eutectic region through in-depth atomic-scale investigation,which can provide inspiration for the improvement of comprehensive mechanical properties of NiTiNb alloys.

关键词： NiTiNb Eutectic alloys Mechanical properties Metallic scaffolds Strain hardening

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Energy transfer enhanced photocatalytic hydrogen evolution in organic heterostructure nanoparticles via flash nanoprecipitation processing

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Green Energy & Environment 2025年第2期10卷 390-398页

作者： Miaojie Yu Weiwei Zhang Xueyan Liu Guohui Zhao Jun Du Yongzhen Wu Wei-Hong Zhu Key Laboratory for Advanced Materials and Institute of Fine Chemicals Joint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianLiaoning116023China

Organic nanophotocatalysts are promising candidates for solar fuels production,but they still face the challenge of unfavorable geminate recombination due to the limited exciton diffusion ***,we introduce a binary nanophotocatalyst fabricated by blending two polymers,PS-PEG5(PS)and PBT-PEG5(PBT),with matched absorption and emission spectra,enabling a Forster resonance energy transfer(FRET)process for enhanced *** heterostructure nanophotocatalysts are processed using a facile and scalable flash nanoprecipitation(FNP)technique with precious kinetic control over binary nanoparticle *** resulting nanoparticles exhibit an exceptional photocatalytic hydrogen evolution rate up to 65 mmol g^(-1) h^(-1),2.5 times higher than that single component *** through fluorescence spectra and transient absorption spectra confirm the hetero-energy transfer within the binary nanoparticles,which prolongs the excited-state lifetime and extends the namely“effective exciton diffusion length”.Our finding opens new avenues for designing efficient organic photocatalysts by improving exciton migration.

关键词： Polymer photocatalysts Nanoparticles Hydrogen evolution Forster resonance energy transfer

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Study on arc characteristics and weld appearance of lasertwinarc-GTAW hybrid welding

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China Welding 2025年第1期34卷 12-27页

作者： Bo Wang Hongtao Zhang Jian Sang School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China Shandong Provincial Key Laboratory of Special Welding Technology Harbin Institute of Technology at WeihaiWeihai 264209China

Laser twin-arc GTAW(LTA-GTAW)process has been developed by using the synergic interaction effects of laser and a coupled arc in a weld pool to achieve higher energy *** this study,bead-on-plate welding was conducted on 8-mm-thick Q235B work-pieces to investigate the variation of hybrid arc profile,the influence of hybrid arc profile on weld forming,microstructure and mech-anical properties of the joint during the LTA-GTAW *** influence of Laser-GTAW and LTA-GTAW methods on weld surface appearance,heat input per unit length,and weld metal microstructure were also demonstrated *** LTA-GTAW can make the distribution of arc energy more reasonable in welding depth and *** defocus is 0,I_(f)is 330 A,I_(b)is 240 A,laser power is 2.4 kW,and spacing between heat sources of tungsten electrode is 10 mm,the weld shape is *** with Laser-GTAW,LTA-GTAW can achieve lower heat input at the same penetration depth,and the microstructure of the weld is *** tensile strength of the welded joint is 121.8%of the base material,and the fracture mode of the welded joint is ductile fracture,the comprehensive mechanical properties are better.

关键词： Hybrid welding Twin-arc gas tungsten arc welding Laser welding Arc profile Microstructure

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KCl acts as a flux to assist the growth of sub-millimeter-scale metallic 2D non-layered molybdenum dioxide

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Rare Metals 2025年第1期44卷 404-416页

作者： Li-Ying Deng Qing Zhang Wang-Yang Li Xiao-Yuan Ye Yi-Fan Zhao Shen-Zhong Chen Yu-Lan Wang Xing-Hui Wang Hui-Peng Chen Zhi-Yang Yu Qun Yan Shu-Ying Cheng Tai-Liang Guo Wen-Ping Hu Feng Ding Jie Sun National and Local United Engineering Laboratory of Flat Panel Display Technology College of Physics and Information EngineeringFuzhou UniversityFuzhou350100China Fujian Key Laboratory of Agricultural Information Sensing Technology College of Mechanical and Electrical EngineeringFujian Agriculture and Forestry UniversityFuzhou350002China Key Laboratory of Organic Integrated Circuit Department of ChemistrySchool of ScienceMinistry of Education and Tianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityTianjin300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin300072China College of Physics and Information Engineering Institute of Micro-Nano Devices and Solar CellsFuzhou UniversityFuzhou350108China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou350116China Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518000China

Two-dimensional(2D)metal oxides(2DMOs),such as MoO_(2),have made impressive strides in recent years,and their applicability in a number of fields such as electronic devices,optoelectronic devices and lasers has been ***,2DMOs present challenges in their synthesis using conventional methods due to their non-van der Waals *** report that KCl acts as a flux to prepare large-area 2DMOs with sub-millimeter *** systematically investigate the effects of temperature,homogeneous time and cooling rate on the products in the flux method,demonstrating that in this reaction a saturated homogenous solution is obtained upon the melting of the salt and ***,the cooling rate was adjusted to regulate the thickness of the target crystals,leading to the precipitation of 2D non-layered material from the supersaturated solution;by applying this method,the highly crystalline non-layered 2D MoO_(2)flakes with so far the largest lateral size of up to sub-millimeter scale(~464μm)were *** studies have revealed that the 2D MoO_(2)features metallic properties,with an excellent sheet resistance as low as 99Ω·square^(-1 )at room temperature,and exhibits a property of charge density wave in the measurement of resistivity as a function of temperature.

关键词： 2D non-layered materials Metallic Metal oxide Thickness modulation Flux method

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Giant spatial Goos-Hänchen shift achieved in superconducting hyperbolic metamaterials with graphene

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Optics Express 2025年第9期33卷 19359-19370页

作者： Yang, Junfu Xie, Zhijiang Ni, Hao Chen, Xiaoling Qin, Zhongli Zhao, Dong Zhao, Miaomiao State Key Laboratory of Mechanical Transmission for Advanced Equipment Chongqing University Chongqing400044 China College of Mechanical and Vehicle Engineering Chongqing University Chongqing400044 China School of Electronic and Information Engineering Hubei University of Science and Technology Xianning437100 China Hubei Provincial Key Laboratory of Optoelectronic Information and Intelligent Control Hubei University of Science and Technology Xianning437100 China

We have theoretically analyzed the enhancement and regulation of the Goos-Hänchen (GH) shift within hyperbolic metamaterials in the near-infrared band under low-temperature conditions. Given a fixed incident wavelength, photonic crystals constructed from graphene and superconductor present hyperbolic dispersion characteristics in the dispersion space by modulating the Fermi energy of graphene. Near the critical phase transition point from elliptic dispersion to hyperbolic dispersion, the phase of the reflection coefficient undergoes an abrupt alteration. Consequently, a remarkably large GH shift occurs precisely at the resonant state. A substantial GH shift can be effectively realized by regulating the layers of graphene, the thickness of the superconductor, and the temperature. The largest positive GH shift reaches up to 4000λ at T = 200 K. This research is anticipated to provide theoretical guidance for devising high-sensitivity temperature sensors based on the GH shift effect in hyperbolic materials within a low-temperature environment. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Metamaterials

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A High-Power Wave Energy Harvester with Mag-Boost Mechanism 5th

A High-Power Wave Energy Harvester with Mag-Boost Mechanism

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5th International Conference on Vibration and Energy Harvesting Applications, VEH 2024

作者： Tang, Tianyi Li, Yunfei Sun, Lining Liu, Huicong State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China School of Mechanical and Electrical Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow University Suzhou China

ISBN: (纸本)9789819611904

Ocean wave energy is a widely anticipated new type of renewable energy. However, due to the ultra-low-frequency and random motion characteristics of ocean waves, effectively harnessing it presents a significant challenge. This paper proposes a Mag-Boost mechanism based on the phenomenon that the magnetic torque undergoes a sudden change when the magnetic poles of two magnets are orthogonal. This innovative mechanism, requiring just a trigger below 1 Hz, can stimulate a power-magnet to generate high-frequency oscillation without direct contact. Utilizing this mechanism, a high-power wave energy harvester (WEH) with ultra-low-frequency response capabilities has been developed. Tested on a six-degree-of-freedom platform, the WEH demonstrated a high-output power of 1.44W and a power density of 1.2 kW/m3 at a frequency of 1 Hz and an inclination angle of 30°. The peak open-circuit voltage of the WEH reached 5 V, ensuring a completely independent and stable power supply for wireless temperature and humidity sensors. Furthermore, the Mag-Boost mechanism also shows considerable potential for harvesting other forms of low-frequency environmental energy, including wind, vibration, and human kinetic energy. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Water waves

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High-performance ethanol gas sensing using surfactant-assisted Bi2MoO6 nanosheets with enhanced sensitivity and selectivity

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Journal of Materials Science: Materials in Electronics 2025年第14期36卷 1-20页

作者： Wen, Jun Rui, Yiting Yi, Zichuan Zhang, Xiaowen Lin, Zhidong Liu, Liming School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China Zhongshan Branch of State Key Laboratory of Electronic Thin Films and Integrated Devices Zhongshan Institute University of Electronic Science and Technology of China Zhongshan528402 China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Wuhan Institute of Technology Wuhan430073 China School of Materials Science and Engineering & Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin541004 China Guangdong Province Key Laboratory of Optical Information Materials and Technology Institute of Electronic Paper Displays South China Academy of Advanced Optoelectronics South China Normal University Guangzhou510006 China

Herein, we report the facile hydrothermal synthesis of Bi2MoO6 nanosheets, achieved through the combined use of surfactant-assisted and pH-controlled conditions. A comparative analysis of different types and concentrations of surfactants was conducted to determine the optimal conditions for synthesis. The resulting Bi2MoO6 features a mesoporous architecture composed of interconnected nanosheets with an average pore size of approximately 3 nm. Characterization results reveal that this dual approach of surfactant addition and pH control effectively modulates the morphology and optimizes the band gap energy levels of bismuth molybdate materials, significantly enhancing the specific surface area. Notably, Bi2MoO6 synthesized with 0.2 mmol of L-Tartaric acid (TA) achieved an exceptionally high response value of 118 to 100 ppm ethanol at an operating temperature of 200 °C, and the sensor demonstrated a practical detection limit as low as 20 ppb (S = 4.13), showcasing its high sensitivity. Additionally, the sensors demonstrated remarkable selectivity for ethanol, outperforming other gases in the concentration range of 100 ppm to 20 ppb. These findings underscore the promise of Bi2MoO6 gas sensors prepared via surfactant addition and pH control for the rapid and sensitive detection of low ethanol concentrations at low temperatures. This method could have significant implications for environmental monitoring and industrial safety applications, where the detection of trace levels of ethanol is critical. This Bi2MoO6-based sensor, with its combination of high sensitivity, selectivity, and stability, stands out as a valuable tool for advanced gas sensing applications. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.

关键词： Nanosheets

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Study on Synergistic Extraction of Iron from Carbide Slag and Nickel Slag

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Journal of Sustainable Metallurgy 2025年 1-10页

作者： Yang, Lushun Li, Bin Du, Xueyan Han, Mengyao School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China

Iron recovery from nickel slag, a significant byproduct generated during nickel pyrometallurgical process, represents a pivotal aspect of advancing sustainable utilization of metallurgical solid waste. This study explores the potential of utilizing carbide slag as a fluxing modifier to enhance iron extraction from nickel slag through the melting oxidation process. Thermodynamic simulations were conducted with FactSage software to predict phase equilibria and reaction pathway, while experimental analyses were performed to investigate phase composition, microstructural morphologies, and iron recovery efficiencies. The results indicate that in the FeO–SiO2–CaO–MgO slag system, predominant magnetite emerges as the primary iron-bearing phase in the spinel region. Increasing the slag’s basicity shifts the corresponding phase area of spinel increases first and then decreases. Thermodynamic predictions and experimental data corroborate that the addition of carbide slag facilitates the transformation of the fayalite phase into magnetite and pyroxene phases. Optimal basicity levels enhance the precipitation and crystal growth of magnetite, as well as promote the separation of iron from the slag matrix. Specifically, at a basicity of 0.5, the oxidized samples displayed the highest magnetite precipitation, with a recovery rate of 93.2%. Detailed microstructural analysis revealed the formation of well-defined dendritic magnetite crystals. These findings suggest that the introduction of carbide slag not only optimizes the phase transformation processes but also significantly enhances iron recovery, offering a viable pathway for the synergistic reutilization of nickel and calcium carbide slags. © The Minerals, Metals & Materials Society 2025.

关键词： Magnetite

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Anion-induced electrolyte chemistry enables high energy density primary battery for ultralow-temperature conditions

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Science China Chemistry 2025年第5期68卷 2051-2058页

作者： Zi-Hang Xue Hao-Jie Liang Yong-Li Heng Jia-Lin Yang Edison Huixiang Ang Hong-Yan Lü Hong Yu Dongmei Dai Dai-Huo Liu Chuan-Yu Zheng Wei Guo Xing-Long Wu Department of Chemistry Northeast Normal University MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal University Natural Sciences and Science Education National Institute of EducationNanyang Technological University State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical University School of Chemistry and Chemical Engineering Henan Normal University Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University

Lithium/fluorinated-carbon（Li/CFx） primary batteries are widely used in defense and military fields due to their stable discharge plateau,low self-discharge rate,and adaptability across a wide temperature ***,enhancing their overall energy density and discharge capacity at low temperatures remains a critical ***,we report a strategically designed LiBF4-based sulfite/carboxylate electrolyte,where the anion-involved solvation structure significantly enhances electrochemical kinetics by reducing the desolvation ***,it introduces a radical reaction mechanism that contributes to additional *** a result,the Li/CFxprimary batteries with this formulated electrolyte deliver a specific capacity of 2,257.15 mAh g-1at 25 ℃.More importantly,when operating at -40 ℃,the batteries exhibit an exceptionally high discharge capacity of 1,549.4 mAh g-1and an energy density of 2,868.6 Wh *** at -60 ℃,the Li/CFxcells achieve a specific capacity of 444.3 mAh g-1and an energy density of 821.8 Wh kg-1at 0.1 C,significantly outperforming previously reported organic-based liquid *** work offers a viable strategy for enhancing the specific capacity and energy density of primary batteries in extreme environments,providing valuable insights for future developments.

关键词： Li/CFx primary batteries radical reaction mechanism desolvation barrier low-temperature

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Understanding the iodine electrochemical behaviors in aqueous zinc batteries

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Journal of Energy Chemistry 2025年第2期101卷 402-415,I0009页

作者： Xuefang Xie Xiaoxin Xu Shuquan Liang Guozhao Fang College of Physical Science and Technology Xinjiang UniversityUrumqi 830017XinjiangChina Xinjiang Key Laboratory of Solid State Physics and Devices Xinjiang UniversityUrumqi 830046XinjiangChina School of Materials Science&Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 41003 HunanChina National Energy Metal Resources and New Materials Key Laboratory Central South UniversityChangsha 410083HunanChina

Iodine is widely used in aqueous zinc batteries(ZBs)due to its abundant resources,low cost,and active redox *** addition to the active material in zinc-iodine batteries,iodine also plays an important role in other ZBs,such as regulating the electrochemical behavior of zinc ions,promoting the reaction kinetic and reversibility of other redox pairs,catalytic behaviors related to iodine reactions,coupling with other halogen ions,shuttle behaviors of polyiodides,***,there is currently a lack of comprehensive discussion on these ***,this review provides a comprehensive overview of the electrochemical behaviors of iodide in the aqueous *** effect of iodine ions on the Zn^(2+)desolvation behaviors and the interfacial behaviors of Zn anode was *** redox pairs boosting other redox pairs,such as MnO_(2)/Mn^(2+)redox pair and vanadium redox pair to obtain high reversibility and capacity was also ***,the catalytic behaviors related to iodine reactions in aqueous ZBs,synergistic reaction with other halogen ions and suppression of shuttle behaviors for high performance zinc-iodine batteries were systematically ***,future prospects for designing effective iodine electrochemical behaviors with practicability are proposed,which will provide scientific guidance for the practical application of iodine-related aqueous ZBs.

关键词： lodide ion Redox pairs Catalytic behavior Shuttle effect Zinc batteries

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