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Mechanism modulating the redox chemistry of hexaazatriphenylene-based small molecules by push–pull electron effect for zinc-ion batteries

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Rare Metals 2025年 1-10页

作者： Wang, Zhi-Qiang Liu, Jing-Wei Chen, Jing-Jing Huang, Yong-Cong Hussain, Iftikhar Luo, Wen Yuan, Hui-Min Hu, Jing Wang, Zhen-Yu Yang, Ming-Yang Li, Ying-Zhi Liu, Gui-Yu Gu, Shuai Zhang, Kai-Li Lu, Zhou-Guang Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen518055 China College of Chemistry and Chemical Engineering Central South University Changsha410083 China Department of Mechanical Engineering City University of Hong Kong 999077 Hong Kong

Organic compounds are promising electrode materials for aqueous zinc-ion batteries (AZIBs) but largely suffer from poor rate and cycling performance. This work reports that the push–pull electron effect of organic compounds could be used to tune the electrochemical performance of AZIBs. Hexaazatriphenylene-based (HATN) small molecules with different withdrawing or donating groups were synthesized and used as electrodes for AZIBs. Compared to the hydrogen atoms and electron-donating methyl groups, the electron-withdrawing fluorine atoms endow HATN-based small molecule (HATN-6F) with a much-improved redox platform, rate performance and cycling stability. The fluorinated electrode HATN-6F potently amplifies and stabilizes the kinetics of cation co-(de)insertion reactions, concurrently enhancing the conductivity and electron affinity, resulting in improved rate performance and enhanced cycling stability. The combination of theoretical calculations and experimental characterization confirms that the fluorine-rich peripheral environment effectively modifies the distribution of conjugated electrons in HATN, enhancing its affinity for zinc ions and improving its capacity for cations zinc storage. This work demonstrates a new avenue for the design and synthesis of organic electrode with excellent electrochemical performance for ZIBs. © Youke Publishing Co.,Ltd 2025.

关键词： Redox reactions

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Metallurgy and Solidification Microstructure Control of Fusion-Based Additive Manufacturing Fabricated Metallic Alloys:A Review

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 29-53页

作者： Qiang Li Xing-Ran Li Bai-Xin Dong Xiao-Long Zhang Shi-Li Shu Feng Qiu Lai-Chang Zhang Zhi-Hui Zhang Key Laboratory of Bionic Engineering(Ministry of Education) and College of Bionic Science and EngineeringJilin UniversityChangchun130022China Institute of Structured and Architected Materials Liaoning Academy of MaterialsShenyang110167China Key Laboratory of Automobile Materials Ministry of Education and Department of Materials Science and EngineeringJilin UniversityChangchun130025China School of Mechanical and Aerospace Engineering Jilin UniversityChangchun130025China School of Engineering Edith Cowan University270 Joondalup DriveJoondalupPerthWA6027Australia

The metal-based additive manufacturing(AM),also referred to as metal 3D printing,has drawn particular interest because it enables direct creation,aided by computationally-directed path design,of intricate components with site-specific compositions and geometrical requirements as well as low buy-to-fly *** the last two decades,the objective of this revolutionary technology has been shifting from only“rapid prototyping”to advanced manufacturing of special high-end products or devices,which,in many aspects,outperform conventional manufacturing *** fusion-based AM,significant progress has been achieved in understanding the processing window of macroscopic scales,non-equilibrium metallurgy of mesoscale scales,and grain evolution of microscopic *** the versatile capacity of AM facilitates new avenues for discovering advanced materials and structures,their potential has still not been fully *** the unique non-equilibrium solidification during the AM process,coarse columnar grains with strong textures are usually developed along the build direction,which downgrades the mechanical *** push the limits of this digital manufacturing,this review attempts to provide in-depth and comprehensive overviews of the recent progress in understanding the evolution and control of the as-built microstructure that has been made recently and the challenges encountered during the AM process.

关键词： Additive manufacturing Temperature field Microstructure control Nanoparticles Functionally graded materials

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Temperature dependence of pressure sensitive flow in bulk metallic glass composites

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Journal of materials science & Technology 2024年第14期181卷 165-175页

作者： Priyanka Saini Yakai Zhao Biao Li Long Zhang U.Ramamurty R.L.Narayan Department of Materials Science and Engineering Indian Institute of TechnologyDelhi 110016India School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore 639798Republic of Singapore Institute of Materials Research and Engineering Agency for ScienceTechnology and Research138634Republic of Singapore Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The constraint factor,C,defined as hardness,H,to the yield strength,σ_(y),ratio,is an indirect measure of the pressure sensitivity in *** investigations determined that while C is less than 3 for crystalline materials,and remains invariant with change in temperature,it is greater than 3 for bulk metallic glasses(BMGs)and increases with increasing temperature,below their glass transition temper-ature,T_(g).In this study,the variations in C for two BMG composites(BMGCs),which have an amorphous matrix and in situ precipitated crystallineβ-Ti dendrites,which in one case transforms under stress toα”-Ti and deforms by slip in the other,as a function of temperature are examined and compared with that of a *** this purpose,instrumented indentation tests,with a Berkovich tip,and uniaxial com-pression tests were performed to measure the H andσ_(y),respectively,on all alloys and their constituents at temperatures in the range of 0.48 T_(g) and 0.75 T_(g).σ_(y) and H of the BMGC with transforming dendrites(BMGC-T)increase and remain invariant with increasing temperature,***,in BMG and the BMGC with non-transforming dendrites(BMGC–NT),the same properties decrease with increas-ing ***-T has the highest C of∼4.93 whereas that of BMGC–NT and BMG are∼3.72 and∼3.28,respectively,at 0.48 T_(g).With increasing temperature,C of the BMG and BMGC–NT increases with temperature,but that of the BMGC-T *** values of C and their variations as a function of temperature were explained by studying the variation of pressure sensitivity of the amorphous phase and concluding that the plastic flow in BMGCs under constrained conditions,such as indentation,is con-trolled by the flow resistance of the amorphous matrix whereas that in uniaxial compression,which is only partially constrained,is controlled by plasticity in both the dendrites and matrix.

关键词： Bulk metallic glass composites Hardness Pressure sensitivity Martensitic transformation

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Impact of annealing on structural and corrosion resistance properties of Ti_(20)Zr_(20)Hf_(20)Be_(20)Ni_(20)high-entropy metallic glass

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Rare Metals 2025年第1期44卷 565-580页

作者： Ke-Ran Li Pan Gong Dong-Liang Wang Cheng Zhang Hu Huang Muhammad Yasir Mao Zhang Xin-Yun Wang State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Research Institute of Huazhong University of Science and Technology in Shenzhen Shenzhen 518057China Key Laboratory of CNC Equipment Reliability Ministry of EducationSchool of Mechanical and Aerospace EngineeringJilin UniversityChangchun 130022China Department of Materials Science&Engineering Institute of Space TechnologyIslamabad 44000Pakistan

This study comprehensively investigates the effects of annealing on the structural,electrochemical properties and passivation film characteristics of Ti_(20)Zr_(20)Hf_(20)Be_(20)Ni_(20)(at%)high-entropy metallic glass(HE-MG).Subjected to various annealing temperatures,the samples were analyzed in a 3.5 wt%NaCl solution to evaluate changes in their microstructure and assess their corrosion *** reveal that the HE-MG undergoes multistage crystallization,displaying an amorphous matrix integrated with face centered cubic(FCC)and Ni_(7)Zr_(2)phases between 420 and 500℃,indicating robust thermal *** assessments identify a critical temperature threshold:Below the glass transition temperature(Tg),the HE-MG maintains excellent corrosion resistance,promoting stable passivation *** Tg,enhanced long-range atomic rearrangement during relaxation increases passivation layer defects and significantly diminishes corrosion resistance.X-ray photoelectron spectroscopy(XPS)analyses show that the primary components of the passivation layer are TiO_(2),ZrO_(2),HfO_(2)and *** annealing temperatures lead to enhanced Be and Ni content and decreased Ti,Zr and ***,high mixing entropy and significant atomic size mismatch suppress long-range atomic rearrangement and *** crystallization begins above Tg by_(20)℃,with crystalline phases evenly distributed within the matrix without drastically affecting corrosion *** investigation highlights the impact of thermal treatment on the properties of HE-MG,contributing valuable insights into optimizing their performance and applications.

关键词： High-entropy metallic glass Annealing Corrosion resistance Glass transition temperature Cluster

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PERFORMANCE EVALUATION OF HONEYCOMB FOAM CORE HYBRID SANDWICH COMPOSITES WITH VARYING FIBER REINFORCED POLYMER SKIN

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Composites: Mechanics, Computations, Applications 2024年第1期15卷 65-78页

作者： Kamaraj, M. Matthew, Samuel Navghare, Sarvesh Datta, Shubhabrata Centre for Composite and Advanced Materials Department of Mechanical Engineering Faculty of Engineering and Technology SRM Institute of Science and Technology Kattankulathur Tamil Nadu Chengalpattu603203 India

This research is an analysis of a unique high-density honeycomb foam named Lantor Soric, a flexible core material specifically used for resin infusion. To understand the full scope of this unique core material, it was bonded with various synthetic, natural, and hybrid face sheets. The glass, carbon, and jute fibers were utilized to prepare the face sheets, and epoxy was used as a binder. The sandwich composite samples were developed by a vacuum resin infusion technique. The performance of the sandwich composite, such as water absorption, flammability, and tensile and flexural strength, revealed that the addition of honeycomb foam to the composite structure improved the performance, such as water absorption, flammability, and tensile and flexural strength of the sandwich composite. The honeycomb foam was able to distribute the resin evenly throughout the laminate via its flow channels. Also, the hybrid composite of natural and synthetic fibers showed some astonishing properties in mechanical testing. The failure mechanism of the sandwich composite was inspected using scanning electron microscopy. Fractography revealed that the main mechanism for the failure was fiber pull out, voids, and interfacial debonding. © 2024 by Begell House, Inc. ***.

关键词： Foams

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Effect of austenitizing temperature on martensitic transformation in SA508Gr.4N steel

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Journal of materials science & Technology 2024年第19期186卷 244-255页

作者： Shumeng Lu Li Wan Shanju Zheng Mengnie Li Juanna Ren Baosheng Liu Manal F.Abou Taleb Zeinhom M.El-Bahy Zhongdong Xu Xiaojing Wang Mohamed M.Ibrahim Zhanhu Guo Faculty of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093China Department of Materials Science and Engineering Inner Mongolia Zhongsheng Engineering Technology Co.Ltd.Alashan 750300China Department of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle Upon TyneNE18STUK Department of Chemistry College of Science and Humanities in Al-KharjPrince Sattam Bin Abdulaziz UniversityAl-Kharj11942Saudi Arabia Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia

SA508Gr.4 N steel is commonly used in nuclear pressure vessels. The current study discloses the impact of austenitizing temperature on its martensitic transformation. Various austenitizing temperatures were employed to examine the martensitic transformation at different experimental conditions. The characteristics of grain boundaries, microstructure, transformation kinetics, and crystallography of the martensitic phase following the austenitizing process and martensitic transformation were analyzed. Austenitizing temperatures had minimal effects on the critical temperature of the austenitizing phase transition. However, an increase in austenitizing temperature resulted in larger grain sizes. The phase composition primarily consisted of lath martensite, accompanied by a small amount of residual austenite (RA). As the austenitizing temperature increased, the temperature of martensite-start temperature (Ms) initially decreased and then increased. On the other hand, the temperature of martensite-finish (Mf) showed no significant sensitivity to changes in the austenitizing temperature. Moreover, the average size of the lath martensite structure was increased, and there was an increased tendency for variant selection as the austenitizing temperature increased, and the combination of specific orientation relationships appeared. This study is very valuable for revealing the microstructure evolution at different temperatures.

关键词： SA508Gr.4 N steel Austenitizing temperature Martensitic transformation Microstructures characteristics

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In-situ experiment tests and particulate simulations on powder paving process of additive manufacturing

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Particuology 2023年第3期74卷 164-172页

作者： Tan Cheng Hui Chen Qing Teng Qingsong Wei State Key Lab of Materials Forming and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Department of Mechanical Engineering National University of SingaporeSingapore117575Singapore

In this work,in-situ experimental tests are first performed to investigate the powder spreading process of additive manufacturing,where different kinds of scrapers and spreading speeds are *** kinetic behaviours of individual powder particles are discussed by discrete element method *** is found that the decrease of inclination angle of the scraper improves the powder pressure and compaction in the spreading process,leading to a denser powder flow and thus a denser powder *** increase of spreading speed also improves the powder pressure and compaction in the spreading ***,the powder flow becomes looser due to the volume dilation,and thus the quality of the paved powder bed *** industrial applications,if the higher powder spreading speed is employed to improve the processing efficiency,the scraper with a smaller inclination angle can be used to ensure the powder bed quality.

关键词： Additive manufacturing Powder paving Packing quality Powder bed Inclination angle In-situ measurement

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Additive manufacturing of cordierite materials by digital light processing

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Ceramics International 2024年第16期51卷 22683-22690页

作者： Tsai, Jung-Ting Gupta, Anant Kumar Muhtadin, Muhtadin Department of Mechanical Engineering National Taiwan University of Science and Technology Taipei106335 Taiwan Department of Materials Engineering Indian Institute of Technology Jammu Jammu and Kashmir 181221 India

Cordierite ceramic material is exceptionally resistant to chemical corrosion, low thermal expansion, and thermal shock, which would be a suitable candidate for thermal applications. Cordierite materials ((Mg, Fe)₂Al₄Si₅O₁₈) were additive manufactured by digital light processing (DLP). The proposed ceramic UV-curable method vastly decreases the traditional fabrication time steps, providing a more complex design with a more efficient and cost-effective solution. The commercial-made ready cordierite UV-curable resin shows a ceramic yield of 72 %, with linear shrinkage of 12.5 % and open porosity of 4.9 % however close porosity reaches as high as 9.07 % which results in a very low mechanical strength. The x-ray tomography shows that before sintering, large air bubbles already existed in the green body, while after the sintering, large porosity with a non-sphericity shape resides in the center with smaller porosity but a more spherical shape distributed in the specimen. © 2024 Elsevier Ltd and Techna Group S.r.l.

关键词： Sintering

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EBSD Characterization of Microstructure and Micro-texture in a Friction Stir-Welded DP600 Steel

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Acta Metallurgica Sinica(English Letters) 2023年第5期36卷 789-802页

作者： H.Ashrafi M.Shamanian M.Sanayei F.Farhadi J.A.Szpunar Faculty of Chemical and Materials Engineering Shahrood University of TechnologyShahrood***Iran Department of Materials Engineering Isfahan University of TechnologyIsfahan***Iran Department of Mechanical Engineering University of SaskatchewanSaskatoonSKS7N 5A9Canada Department of Materials Science and Engineering Worcester Polytechnic InstituteWorcesterMA01609USA

The microstructure and micro-texture in different areas of a friction stir(FS)-welded DP600 steel were investigated by means of electron backscatter *** volume fraction of martensite and non-polygonal ferrite was evaluated based on the image quality(IQ)*** of grain boundaries revealed that the fraction of sub-grain boundaries as well as that of low-angle grain boundaries in the heat-affected zone(HAZ)and stir zone(SZ)was more than doubled compared to those in the DP600 steel base metal(BM).The micro-texture examination of the BM showed strong{112}<110>and{111}<112>components with an intensity 4.6 times of that random *** texture showed a memory effect in the HAZ,with a reduced overall *** the SZ,D_(1),D_(2) and E shear texture components together with a cube component were *** of these texture components of ferrite were attributed to the transformation of B and R texture components of prior austenite,which are evidences of continuous dynamic recrystallization mechanism in the SZ of the friction stir-welded DP600 steel.

关键词： Dual phase steel Friction stir welding Micro-texture Image quality

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Improvement of interleaving Aramid pulp microfibers on compressive strengths of carbon fiber reinforced polymers with and without impact

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Chinese Journal of Aeronautics 2023年第10期36卷 459-470页

作者： Fei CHENG Guangming YANG Yunsen HU Bingyan YUAN Xiaozhi HU School of Materials Science and Engineering Southwest University of Science and TechnologyMianyang 621010China Engineering Research Center of Biomass Materials Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China Department of Mechanical Engineering University of Western AustraliaPerth WA6009Australia

Compressive strengths and elastic moduli of Carbon Fiber Reinforced Polymer(CFRP)composites can be noticeably improved by multiple ultra-thin interlays with non-woven Aramid Pulp(AP)micro/nano-fibers.10-ply CFRP specimens with 0,2,4,6,8 g/m^(2)AP were tested under uniaxial *** flexible AP fibers,filling the resin-rich regions and further constructing the fiber bridging at the ply interfaces,can effectively suppress delamination growth and lead to very good improvements both in the compressive strength and the elastic *** CFRP specimen with an optimum interlay thickness has a distinct shear failure mode instead of the typical delamination cracking along the direction of continuous carbon *** Strengths After Impacts(CAI)of 12.35 J were also measured,up to 90%improvement in CAI has been *** is concluded those ultra-thin interlays of non-woven AP micro/nano-fibers are beneficial to design and manufacture“high strength”CFRP composites.

关键词： Compressive strength Carbon Fiber Reinforced Polymer(CFRP) Aramid pulp Interleaving Interfacial reinforcing

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