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Effect of fifferent filler wires on mechanical property and conductivity of aluminum-copper joints

materials 2020年第16期13卷

作者： Zhang, Hengming Shi, Yu Gu, Yufen Li, Chunkai State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou730050 China

The 1060 aluminum and T2 copper were joined by the pulsed double electrode gas metal arc welding (DE-GMAW) brazing method by using four types of filler wires, namely pure aluminum (Al) ER1100, aluminum-magnesium (Al-Mg) ER5356, aluminum-silicon (Al-Si) ER4043, and Al-Si ER4047, respectively. The effects of different types of filler wires on intermetallic compounds, microhardness tensile strength, and conductivity of joints were investigated. The results showed that a lot of brittle intermetallic compounds laying in the copper side brazing interface zone were generated using pure Al, Al-Mg, and Al-Si filler wires, which caused the change of microhardness, tensile strength, and the conductivity of joints. Meanwhile, with the increase in Si elements contents for Al-Sifiller wires, the thickness of the intermetallic compound layers decreased obviously, which was only up to 3 μm and the conductivity of the joints decreased. In addition, the microhardness, tensile strength, and the conductivity of the joints, when using Al-Sifiller wires, was higher than that using pure Al and Al-Mg filler wires. Hence, in comparison to the pure filler wires and Al-Mg filler wires, the Al-Si filler wires were more suitable for Al-Cu joints by DE-GMAW as Si element content was lower. © 2020 by the authors.

关键词： Tensile strength

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Microstructure, mechanical and corrosion behavior of 316L-xCu functional gradient material manufactured by directed energy deposition

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Journal of Alloys and Compounds 2025年

作者： Jialing Chuan Wentao Li Yiwei Yu Tianlong Zhang Guojun Wen Rong Chen School of Mechanical Engineering and Electronic Information China University of Geosciences Wuhan 430000 China Shanghai Key Laboratory of Materials Laser Processing and Modification Shanghai Jiaotong University Shanghai China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay Hong Kong China State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430000 China

A novel 316L-xCu functional gradient material (FGM) was fabricated by laser directed energy deposition (LDED) in this work. The microstructure, mechanical and corrosion behavior were investigated. A combined gradient microstructure with increased volume fraction of Cr segregation and high grain boundary density (HGBD) along depth with increasing x from 0 to 8 wt.% in the 316L-xCu FGM was formed. As a result, 316L-xCu FGM demonstrated an improved corrosion resistance, as evidenced by 64% reduction in passive current density (i p ). The corrosion behavior significantly differs from homogeneous materials, with micro-galvanic (induced by microscale heterogeneity between intragranular and grain boundaries) and macro-galvanic (driven by potential gradient between adjacent regions) coupling mechanisms synergistic governed. The FGM effectively mitigated macro-galvanic corrosion by minimizing the low-potential surface area while maintaining elevated bulk potentials via Cu alloying. Besides, with Cr segregation to HAGBs, FGM pose enhanced electrochemical stability by fostering protective oxide film formation during micro-galvanic corrosion. The FGM also achieved improved strength without compromising elongation, attributable to the heterogeneous deformation-induced (HDI) effect generated by the gradient microstructure, which promoted higher work hardening rates and facilitated strain delocalization during plastic deformation.

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Directly grown nanostructured electrodes for high-power and high-stability alkaline nickel/bismuth batteries

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Science China materials 2019年第4期62卷 487-496页

作者： Deliang Ba Yuanyuan Li Yunfei Sun Zaiping Guo Jinping Liu School of Optical and Electronic Information Huazhong University of Science and Technology Engineering Materials Institute School of Mechanical Materials & Mechatronics Engineering University of Wollongong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Bismuth oxide(Bi2O3) has received great attention as an anode material for alkaline nickel/bismuth(Ni/Bi) batteries due to its high theoretical capacity and easy preparation. However, the generally poor conductivity of metal oxides and the instability of Bi2O3 during cycling severely limit the device performance. Herein, we present the use of directly grown Bi2O3 nanoflake film with kinetic advantages as the anode for Ni/Bi batteries. Particularly, glucose-derived carbon is integrated onto the surfaces of nanoflakes, which not only enhances the electron transfer but also buffers the conversion-reaction induced volume expansion of Bi2O3, helping maintaining the cycling stability of the film. The resulting Bi2O3@C electrode exhibits high specific capacity, excellent rate performance(can be charged within 6.7 s), and good cycle stability(~1,200 times;fading rate of only 0.011% per cycle).When assembled with a nickel oxide(NiO) nanosheet array cathode in basic electrolyte, a fully binder-free Ni/Bi battery is obtained, which delivers maximum energy and power densities of 34.29 W h kg-1 and 12,159.8 W kg-1, respectively, and good cycling performance. The power density is even much superior to that of many hybrid/asymmetric *** work suggests a new generation of thin-film Ni/Bi batteries for potential high-power electronic applications.

关键词： Bi2O3 binder-free high power high stability alkaline rechargeable battery

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Deformation Temperature Impacts on the Microstructure Evolution and Mechanical Properties of a Novel Medium-Heavy Alloy (Mha)

SSRN

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SSRN 2022年

作者： Xiong, Yi Shu, Kang-Hao Li, Yong Chen, Zheng-Ge Zha, Xiao-Qin He, Tian-Tian Han, Shun Wang, Chun-Xu School of Materials Science and Engineering Henan University of Science and Technology Luoyang471023 China Collaborative Innovation Center of New Nonferrous Metal Materials Advanced Processing Technology Jointly Established by the Ministry of Science and Technology Henan Luoyang471023 China Central Iron and Steel Research Institute Beijing100081 China State Key Laboratory of Laser Interaction with Matter Northwest Institute of Nuclear Technology Shaanxi Xi’an710024 China Luoyang Ship Material Research Institute Henan Luoyang471000 China

Medium-heavy alloys (MHAs) were rolled under different temperatures to characterize the microstructural evolution and mechanical properties by using optical microscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffractometry, electron backscattered diffraction, tensile testing and microhardness testing. The results show that with an increase in the degree of deformation, the equiaxed grains are elongated along the rolling direction. A large number of slip bands are generated to coordinate intense plastic deformation, which leads to the formation of a fibrous texture. The sharp increase in dislocation density promotes significantly the dislocation interaction, which, in turn, refines the grain size of the MHAs to the nanometer level. Compared with the room-temperature rolling specimens, the cryorolling specimens underwent intense deformation. After 90% cryorolling deformation, the MHA grains were refined to 16.1 nm. The strength and hardness of the cryorolling specimens were significantly higher than those of the room-temperature rolling specimens, though the elongation was slightly lower. The fracture morphology of both specimens changed from ductile fracture (before deformation) to a mixed ductile–brittle fracture (after deformation). © 2022, The Authors. All rights reserved.

关键词： Cold rolling

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Cyclopentylmethyl Ether, a Non-Fluorinated, Weakly Solvating and Wide Temperature Solvent for High-Performance Lithium Metal Battery

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Angewandte Chemie 2023年第21期135卷

作者： Han Zhang Dr. Ziqi Zeng Fenfen Ma Qiang Wu Xinlan Wang Prof. Shijie Cheng Prof. Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 Hubei China State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 Hubei China GuSu Laboratory of Materials Suzhou 215123 Jiangsu China

While recent work demonstrates the advantages of weakly solvating solvents in enhancing the cyclability of LMBs, both new designs and design strategies for high performance weakly solvating solvent, especially physicochemical properties, are still lacking. Here, we propose a molecular design to tune the solvating power and physicochemical properties of non-fluorinated ether solvent. The resulting cyclopentylmethyl ether (CPME) have a weak solvating power and wide liquid-phase temperature range. By optimizing the salt concentration, the CE is further promoted to 99.4 %. Besides, the improved electrochemical performance of Li−S battery in CPME-based electrolytes is obtained at −20 °C. The Li||LFP (17.6 mg cm −2 ) battery with developed electrolyte maintains >90 % of the original capacity over 400 cycles. Our design concept for solvent molecule provides a promising pathway to non-fluorinated electrolytes with weakly solvating power and wide temperature window for high-energy-density LMBs.

关键词： Cyclopentylmethyl Ether Molecular Design Non-Fluorinated Solvent Weakly Solvating Power Wide Temperature Range

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Masing Behavior and Microstructural Change of Quenched and Tempered High-Strength Steel Under Low Cycle Fatigue

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Acta Metallurgica Sinica(English Letters) 2019年第11期32卷 1346-1354页

作者： Feng-Mei Bai Hong-Wei Zhou Xiang-Hua Liu Meng Song Ya-Xin Sun Hai-Long Yi Zhen-Yi Huang State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Anhui Key Lab of Materials Science and ProcessingAnhui University of TechnologyMaanshan 243002China School of Metallurgical Engineering Anhui University of TechnologyMaanshan 243002China

Low cycle fatigue behavior of a quenched and tempered high-strength steel(Q960 E) was studied in the strain amplitude ranging from ± 0.5% to ± 1.2% at room temperature. As a result of fatigue loading, the dislocation structural evolution and fracture mechanism were examined and studied by transmission electron microscopy and scanning electron microscopy(SEM). The results showed that this Q960 E steel showed cyclic softening at different strain amplitudes, and the softening tendency was more apparent at strain amplitude of ±(0.6–1.2)% than that at ± 0.5%. The reduction in dislocation density with increasing strain amplitude is responsible for the softening tendency of cyclic stress with the strain amplitude. The material illustrates near-Masing behavior at strain amplitude ranging from ± 0.6% to ± 1.2%. The near-Masing behavior of Q960 E high-strength steel can be the result of stability of martensite lath at different strain amplitudes. Partial transformation from martensite laths to dislocation cells is responsible for the derivation from ideal Masing behavior. In the SEM examination of fracture surfaces, transgranular cracks initiate on the sample surface. Striations can be found during the crack propagation stage.

关键词： High-strength steel Low cycle fatigue Near-Masing behavior Martensite lath

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Abatement of Emissions of a Residential Wood Stove: Effect of the Catalyst on Gaseous and Condensable Pollutants Concentration and Their Toxicity

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ACS Omega 2025年第24期10卷 25506-25517页

作者： Marvin Laboureur Maxence Hannard Tarek Barakat Abhishek Goel Jordi Cornette Svend Bram Patricia Renard Thomas Duquesne Bao-Lian Su Laboratory of Inorganic Materials Chemistry (CMI) − Namur Institute of Structured Matter (NISM) University of Namur rue de Bruxelles 61 Namur 5000 Belgium；Stuv S.A. Rue Riverre 10-12 Floreffe 5150 Belgium Laboratory of Inorganic Materials Chemistry (CMI) − Namur Institute of Structured Matter (NISM) University of Namur rue de Bruxelles 61 Namur 5000 Belgium；Empa - Swiss Federal Laboratories for Materials Science and Technology Ueberlandstrasse 129 Dübendorf 8600 Switzerland Thermo and Fluid Dynamics (FLOW) Vrije Universiteit Brussel (VUB) Pleinlaan 2 Brussels 1050 Belgium；Brussels Institute for Thermal-fluid Systems and Clean Energy (BRITE) Vrije Universiteit Brussel (VUB) and Université Libre de Bruxelles (ULB) Brussels 1050 Belgium Thermo and Fluid Dynamics (FLOW) Vrije Universiteit Brussel (VUB) Pleinlaan 2 Brussels 1050 Belgium；Brussels Institute for Thermal-fluid Systems and Clean Energy (BRITE) Vrije Universiteit Brussel (VUB) and Université Libre de Bruxelles (ULB) Brussels 1050 Belgium；Faculty of Aerospace Engineering Delft University of Technology Kluyverweg 1 Delft 2629 HS The Netherlands Laboratory of Biochemistry and Cell Biology (URBC)-Namur Research Institute for Life Sciences (NARILIS) University of Namur Rue de Bruxelles 61 Namur 5000 Belgium Stuv S.A. Rue Riverre 10-12 Floreffe 5150 Belgium Laboratory of Inorganic Materials Chemistry (CMI) − Namur Institute of Structured Matter (NISM) University of Namur rue de Bruxelles 61 Namur 5000 Belgium；State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Hongshan Luoshi Road Wuhan 430070 China

The use of biomass combustion for residential heating purposes is crucial for reaching the European Union’s 2050 climate-neutrality goals. It, however, raises environmental and health concerns. This study explores the impact of a patented catalyst on wood stove emissions and, notably, its influence on cytotoxicity by comparing flue gas composition with and without the catalyst. Organic gaseous compounds (OGC) generated by wood combustion comprise two subgroups: water-soluble condensable organic compounds (WSCOC) and high-saturating vapor organic compounds (HSVOC). The second is mainly composed of methane, a molecule challenging to oxidize into CO2at these operating temperatures. While the catalyst moderately eliminates OGC (19%) in general, it excels in removing CO (87%) and WSCOC (80%), particularly polycyclic aromatic hydrocarbons (PAH) (91%). Bioassays on the A549 human cell line show that the catalytic WSCOC removal is correlated with a significant decrease in cytotoxicity (50%). Additionally, particle number size distribution measurements suggest that the catalyst facilitates the deposition of particles larger than 10 μm, leading to a 66% reduction in the particulate mass concentration. These results underscore the catalyst’s role in mitigating harmful gaseous emissions and reducing the health risks associated with wood stove use, particularly by targeting toxic WSCOC.

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Interfacial component coupling effects induce electron redistribution for enhanced hydrazine-assisted hydrogen production at ampere-level current densities

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Nano Energy 2025年 142卷

作者： Zhao, Xinru Zheng, Hongshun Sun, Huachuan Chen, Mingpeng Wang, Boxue Lu, Qingjie Xiao, Bin Zhou, Tong Li, Dequan Qiu, Guoyang Zhang, Jin Zhang, Yumin Liu, Feng He, Tianwei Pan, Hui Wang, Chundong Liu, Qingju Yunnan Key Laboratory for Micro/Nano Materials & Technology National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University Kunming650091 China Yunnan Precious Metals Laboratory Co. Ltd Kunming650106 China University of Macau Taipa999078 China School of Integrated Circuits State Key Laboratory of New Textile Materials and Advanced Processing Huazhong University of Science and Technology Wuhan430074 China

Hydrazine-assisted hydrogen production promises to boost water electrolysis with low energy consumption. Herein, a silver willow flower-like heterostructure is constructed by coupling Pt nanoparticles with NiMoO4 nanowires that are annealed under nitrogen (N2) conduction (Pt@NMO-N2). Comprehensive electronic structure characterization and theoretical calculations reveal that the built-in electric field (BEF) significantly promotes the transfer of electrons from the oxygen vacancy-rich carrier (NMO-N2) to the Pt sites, thereby accelerating the adsorption and desorption of H-intermediates during the hydrogen evolution reaction (HER) process. Meanwhile, the interfacial component coupling effects and oxygen vacancies result in the d-band center (Εd) shift down to promote the dehydrogenation process from *NH4 to *NH3 in the hydrazine oxidation reaction (HzOR). Additionally, the Pt@NMO-N2 exhibits super-hydrophilicity and superaerophobic properties, which synergistically enhance mass transfer. Impressively, the Pt@NMO-N2 exhibits low overpotentials of 149 and 180 mV at 1000 mA cm–2 for the HER in alkaline freshwater and seawater, respectively, and it only requires a work potential of 121 mV to achieve 1000 mA cm–2 for the HzOR. Notably, the Pt@NMO-N2 (+) || Pt@NMO-N2 (−) electrolyzer operates at a low voltage of 0.32 V to reach 500 mA cm–2 for the hydrazine-assisted water splitting. Furthermore, the self-supported Pt@NMO-N2 catalyst, employed as the cathode in an anion exchange membrane (AEM) electrolyzer, requires only 1.77 V to achieve 500 mA cm⁻² at T = 60 ℃. This work opens avenues for future research on advanced heterostructures in sustainable energy applications. © 2025 Elsevier Ltd

关键词： Diffusion in liquids

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Recent advances in TiO_2 nanoarrays/graphene for water treatment and energy conversion/storage

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Science China materials 2019年第3期62卷 325-340页

作者： Yanhua Fan Guangwu Hu Shuaiqin Yu Liqiang Mai Lin Xu College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai 200135China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Although TiO2-based nanostructures with unique chemical and physical properties exhibit great promise in water treatment and energy conversion/storage,there still exist some *** order to further improve the photochemical properties,one-dimension TiO2 nanoarrays on the substrate are primarily combined with graphene by various preparation *** composite coating has exhibited extraordinary photocatalytic abilities in the degradation of organic pollutants into less toxic compounds,antimicrobial activity and adsorption capacity in water ***,it is easy to recycle after photocatalytic ***,TiO2 nanoarrays/graphene on the substrate(especially flexible substrate)could provide potential opportunities for flexible-device fabrication with excellent photovoltaic conversion efficiency and electrochemical performance in energy conversion/storage *** far as we know,the relevant reviews have rarely been ***,we present a comprehensive review on the preparation of TiO2 nanoarrays or TiO2 nanoarrays/graphene,and their application and mechanism in water treatment and energy conversion/storage.

关键词： TiO2 nanoarrays graphene photocatalysis water treatment energy conversion/storage

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Efficient synthesis of High-Silica Ssz-13 Zeolite and its Catalytic Performance in Mto Reaction

SSRN

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SSRN 2022年

作者： Zhu, Xiaochu Gao, Yu Liu, Meng Yang, Ziyao Li, ShuangShuang Chen, Haorong Liu, Bonan Ma, Wangjing Hensen, Emiel J.M. Shen, Baojian State Key Laboratory of Heavy Oil Processing The Key Laboratory of Catalysis of CNPC College of Chemical Engineering and Environment China University of Petroleum Beijing102249 China Technical Institute of Physics and Chemistry Chinese Academy of Sciences 29 Zhongguancun East Road Beijing100190 China Laboratory of Inorganic Materials Chemistry Eindhoven University of Technology PO Box 513 Eindhoven5600 MB Netherlands

Highly efficient synthesis of zeolites is an important goal given the many catalytic applications of zeolites in industrial chemical processes. The conventional zeolite syntheses, i.e., hydrothermal synthesis in a batch setup are usually challenged by certain limiting factors deriving from the long synthesis period or the low yield. Herein, we report that a combined strategy of organic promoter and zeolite seeding can remarkably improve the synthetic efficiency of high silica SSZ-13 zeolite. The low-cost promoter diethylamine (DEA) and zeolite seeds could both remarkably accelerate the crystallization rate of SSZ-13 zeolite, and DEA has a much higher beneficial effect on the solid yield as compared to the zeolite seeds. Consequently, the crystallization time could be unprecedentedly shorted by a factor of 30, instead of multiple days normally required. Besides, this novel protocol also exhibits high atom efficiency (93% of yield). The resultant high-silica nano-sized SSZ-13 zeolite shows good (hydro)thermal stability along with excellent catalytic performance for the MTO reaction. Furthermore, the strategy has been extended to the fast synthesis of other zeolitic material, like ZSM-5, implying its general applicability in highly efficient synthesis of zeolites. © 2022, The Authors. All rights reserved.

关键词： Zeolites

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