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Integrating thin wall into block:A new scanning strategy for laser powder bed fusion of dense tungsten

Journal of materials Science & technology 2022年第25期120卷 167-171页

作者： Zhengang Xiong Ji Zou Zhaoyang Deng Jinhan Chen Wei Liu Yuchi Fan Minshi Wang Xiaoqing Zhao Chunfeng Yu Dongdong Dong Wenyou Ma Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Institute of Functional Materials Donghua University201620China School of Metallurgy and Materials University of BirminghamBeijing 100084China

Due to a combination of outstanding properties including high melting point,high density,low thermal expansion coefficient,low saturated vapor pressure and excellent thermal conductivity,tungsten(W)parts have been widely used as electrodes,heating elements,anti-scatter grids for Computed Tomography(CT)equipment,rocket nozzles and divertor materials for nuclear fusion[1].

关键词： powder thermal saturated

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Enhanced High-Temperature Energy Storage Density in P-Type Niox Quantum Dots and P(Vdf-Hfp) Composite Dielectrics

SSRN

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SSRN 2024年

作者： Fang, Cheng Zhang, Ziyi Wang, Jian Ye, Zhanwen Li, Kaiyuan Wu, Luoqi Feng, Xiaobin Duan, Bo Dong, Lijie Zhou, Ling Shen, Zhonghui Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics School of Physics and Mechanics Wuhan University of Technology Wuhan430070 China Center for Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China

The harsh application environment imposes higher requirements on the operating temperature of dielectric energy storage capacitors. Suppressing carrier transmission at high temperatures is a critical way to enhance the breakdown field strength (Eb) and the operating temperature of the dielectrics. In this paper, low-concentration nickel oxide quantum dots (NiOx QDs) with P-type defects are introduced into the polymer matrix, and hot carriers are captured by constructing hole traps, thus improving the high-temperature Eb and energy storage density (Udis) of the polymer. The NiOx QDs were synthesized by the chemical precipitation method and were modified with polydopamine (PDA) to prepare P(VDF-HFP)-based composite films. The results show that the NiOx@PDA QDs can effectively enhance the Eb and Udis of the films. What's more, at 90°C, the Eb of the composite film reaches 2242.78 kV/cm, representing a 42.41% increase compared to pure P(VDF-HFP) film (1574.83 kV/cm), and the Udis reaches 2.94 J/cm3, demonstrating an impressive improvement of 164.86% when compared with pure P(VDF-HFP) (1.11 J/cm3). The results confirmed that the P-type NiOx QDs restricted the Poole-Frenkel emission within the dielectrics. Together with the enhanced compatibility of the organic-inorganic composite interface, the macro defects of the composites were suppressed, and higher Eb and Udis were obtained. This work offers a straightforward and efficient approach for manufacturing high-temperature energy storage dielectrics. © 2024, The Authors. All rights reserved.

关键词： Nanocrystals

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Frontiers in high entropy alloys and high entropy functional materials

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Rare Metals 2024年第10期43卷 4639-4776页

作者： Wen-Tao Zhang Xue-Qian Wang Feng-Qi Zhang Xiao-Ya Cui Bing-Bing Fan Jia-Ming Guo Zhi-Min Guo Rui Huang Wen Huang Xu-Bo Li Meng-Ru Li Yan Ma Zhi-Hua Shen Yong-Gang Sun De-Zhuang Wang Fei-Yang Wang Li-Qiang Wang Nan Wang Tian-Li Wang Wei Wang Xiao-Yang Wang Yi-Han Wang Fu-Jie Yu Yu-Zhen Yin Ling-Kun Zhang Yi Zhang Jian-Yang Zhang Qi Zhao Yu-Ping Zhao Xin-Dong Zhu Yasir Sohail Ya-Nan Chen Tao Feng Qi-Long Gao Hai-Yan He Yong-Jiang Huang Zeng-Bao Jiao Hua Ji Yao Jiang Qiang Li Xiao-Ming Li Wei-Bing Liao Huai-Jun Lin Hui Liu Qi Liu Qing-Feng Liu Wei-Di Liu Xiong-Jun Liu Yang Lu Yi-Ping Lu Wen Ma Xue-Fei Miao Jie Pan Qing Wang Hong-Hui Wu Yuan Wu Tao Yang Wei-Ming Yang Qian Yu Jin-Yu Zhang Zhi-Gang Chen Liang Mao Yang Ren Bao-Long Shen Xun-Li Wang Zhe Jia He Zhu Zhen-Duo Wu Si Lan School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China Jiangsu Key Laboratory for Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China Department of Physics City University of Hong KongHongKong 999077China School of Materials Science and Engineering Tianjin UniversityTianjin 300072China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Department of Mechanical Engineering Research Institute for Advanced ManufacturingThe Hong Kong Polytechnic UniversityHong Kong 100872China Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Institute of Advanced Wear&Corrosion Resistance and Functional Materials Jinan UniversityGuangzhou 510632China School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou 221116China School of Physical Sciences Great Bay UniversityDongguan 523000China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Beijing Advanced Innovation Center for Materials Genome Engineering Research Institute for Carbon NeutralityUniversity of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering The University of Hong KongHong Kong 999077China School of Computing Macquarie UniversitySydney 2113Australia Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China State Key Laborato

Owing to their exceptional properties,high-entropy alloys(HEAs)and high-entropy materials have emerged as promising research areas and shown diverse ***,the recent advances in the field are comprehensively reviewed,organized into five *** first section introduces the background of HEAs,covering their definition,significance,application prospects,basic properties,design principles,and *** subsequent section focuses on cutting-edge high-entropy structural materials,highlighting developments such as nanostructured alloys,grain boundary engineering,eutectic systems,cryogenic alloys,thin films,micro-nano-lattice structures,additive manufacturing,high entropy metallic glasses,nano-precipitate strengthened alloys,composition modulation,alloy fibers,and refractory *** the following section,the emphasis shifts to functional materials,exploring HEAs as catalysts,magneto-caloric materials,corrosion-resistant alloys,radiation-resistant alloys,hydrogen storage systems,and materials for ***,the review encompasses functional high-entropy materials outside the realm of alloys,including thermoelectric,quantum dots,nanooxide catalysts,energy storage materials,negative thermal expansion ceramics,and high-entropy wave absorption *** paper concludes with an outlook,discussing future directions and potential growth areas in the *** this comprehensive review,researchers,engineers,and scientists may gain valuable insights into the recent progress and opportunities for further exploration in the exciting domains of high-entropy alloys and functional materials.

关键词： High entropy alloys Cutting-edge structural materials Cutting-edgefunctional materials

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Polymersome formation by solvent annealing-induced structural reengineering under 3D soft confinement

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Nano Research 2021年第12期14卷 4644-4649页

作者： Xi Mao Hao Li Jinwoo Kim Shuai Deng Renhua Deng Bumjoon J.Kim Jintao Zhu Key Laboratory of Material Chemistry for Energy Conversion and Storage of Ministry of Education(HUST) and State Key Laboratory of Materials Processing and Die&Mold TechnologySchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan430074China Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon34141Republic of Korea

A solvent annealing-induced structural reengineering approach is exploited to fabricate polymersomes from block copolymers that are hard to form vesicles through the traditional solution self-assembly *** specifically,polystyrene-b-poly(4-vinyl pyridine)(PS-b-P4VP)particles with sphere-within-sphere structure(SS particles)are prepared by three-dimensional(3D)soft-confined assembly through emulsion-solvent evaporation,followed by 3D soft-confined solvent annealing upon the SS particles in aqueous dispersions for structural engineering.A water-miscible solvent(e.g.,THF)is employed for annealing,which results in dramatic transitions of the assemblies,e.g.,from SS particles to *** approach works for PS-b-P4VP in a wide range of block ***,this method enables effective encapsulation/loading of cargoes such as fluorescent dyes and metal nanoparticles,which offers a new route to prepare polymersomes that could be applied for cargo release,diagnostic imaging,and nanoreactor,etc.

关键词： polymersome block copolymer three-dimensional(3D)confinement self-assembly solvent annealing

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Structural evolution and crystallization kinetics of Fe-based amorphous alloys under ultrasonic vibrations treatment

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Journal of Alloys and Compounds 2025年 1030卷

作者： Qin, Zhi You, Shiyue Zhang, Tong Yin, Fei Zhou, Jing Shen, Jie Jin, Wei Chen, Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Silicate Materials for Architectures School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Hubei Longzhong Laboratory Xiangyang441000 China

Fe-based amorphous alloys are widely used in various fields such as filters, low-frequency mechanical antennas, and wastewater treatment due to their unique soft magnetic properties and band structure. Currently, several surface treatment methods, including such as high-temperature autoclave processing, high-energy particle irradiation, pulsed laser treatment, and dynamic mechanical relaxation are employed to optimize the structure and enhance the performance of Fe-based amorphous alloys. Ultrasonic vibration treatment (UVT) has gained attention for its concentrated and rapid energy application, often used as an assisted method for laser treatments. In this paper, UVT was applied directly to the amorphous alloys, with the total energy input controlled by varying the UVT time. The results of X-ray diffraction and pair distribution function from selected area electron diffraction of TEM indicate that UVT can finely tune and restore the structure of Fe-based amorphous alloys by facilitating the interconversion between bcc and fcc/rcp units according to the two-structure model. Additionally, the influence of UVT on the crystallization kinetics of the amorphous alloys was investigated by differential scanning calorimetry (DSC). The Mu-10s has the most bcc units and the highest activation energies among the samples. It was found that UVT primarily affects the crystal growth stage and does not influence the 'instantaneous nucleation - low-dimensional growth' crystallization process, which influences the soft magnetic and magnetostrictive properties of Fe-based amorphous alloys. The measured structural, thermal, and magnetic parameters of the Mu-240s show a tendency to recover toward those of the initial stage. The fine-tuning and recovery of the structure of Fe-based amorphous alloys through UVT can provide valuable control strategies for the practical applications. © 2025 Elsevier B.V.

关键词： Ultrasonic testing

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Structure and Tribological Evolution of Ta-N Layer by Controlling the Time of Microwave Plasma Nitriding

SSRN

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SSRN 2024年

作者： Li, Jiacheng Xu, Zhigang Peng, Jian Shen, Qiang Wang, Chuanbin State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Guangdong Chaozhou521000 China

The Ta-N layer on the Ta matrix surface was synthesized using microwave plasma nitriding (MPN) to enhance its wear resistance. The effects of holding time on the phase composition, morphology, mechanical properties, friction, and wear of the nitriding layers were systematically examined. The results revealed that nanocrystalline Ta-N layers with a dense surface and low roughness were successfully fabricated. The thickness of the Ta-N layer increased from 0.87 μm to 4.23 μm with prolonged holding time. The hardness of the Ta-N layer increased first and then decreased with the extension of holding time, and reached the maximum at 4h. Friction and wear test results indicated that the Ta-N layer exhibited superior wear resistance at the holding time of 4 h, which was mainly attributed to the synergy of dense structure and the generation of the nanocrystal. In conclusion, the Ta-N layer with the desired hardness and wear resistance was obtained due to MPN treatment, which offered excellent surface protection for the Ta matrix in terms of wear resistance. © 2024, The Authors. All rights reserved.

关键词： Nanocrystals

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Platinum clusters stabilized by zincosilicate zeolite for efficient propane dehydrogenation

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Chinese Journal of Catalysis 2025年第4期71卷 208-219页

作者： Hao Liu Ying Zhang Liyang Liu Tianxiang Chen Xingcong Zhang Peng Hu Chao Xiong Jie Zhou Hao Zhang Lihui Dong Tsz Woon Benedict Lo Bing Nan Xiaohui He Hongbing Ji Key Laboratory of Bioinorganicand Synthetic Chemistry of Ministry of Education Fine Chemical Industry Research InstituteSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou 510275GuangdongChina Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004GuangxiChina Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteShanghai 200120China State Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityHunghomHong KongChina State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon ConversionCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014ZhejiangChina Guangdong Technology Research Center for Synthesis and Separation of Thermosensitive Chemicals Guangzhou 510006GuangdongChina

Dispersing metals from nanoparticles to clusters is often achieved using ligand protection methods,which exhibit unique properties such as suppressing structure-sensitive side ***,this method is limited by the use of different metal precursor salts corresponding to different *** alternative approach,the ion exchange(IE)method,can overcome this limitation to some ***,there is still an urgent need to address the stabilization of metals(especially precious metals)by using IE ***,we reported a Pt cluster catalyst prepared mainly by anchoring Pt atoms via O located near the framework Zn in zincosilicate zeolites and riveted by zeolite surface rings after reduction(reduced Pt/Zn-3-IE).The catalyst can achieve an initial propane conversion of 26%in a pure propane atmosphere at 550℃and shows little deactivation even after 7.5 d of ***,the alteration of catalyst by the introduction of framework Zn was also highlighted and interpreted.

关键词： Zincosilicate zeolite Acid-site identification Rivet effect Pt clusters Propane dehydrogenation

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NiPS_(3)quantum sheets modified nitrogen-doped mesoporous carbon with boosted bifunctional oxygen electrocatalytic performance

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Journal of materials Science & technology 2021年第6期65卷 1-6页

作者： Kai Huang Yuyang Xu Yanpeng Song Ruyue Wanga Hehe Wei Yuanzheng Long Ming Lei Haolin Tang Jiangang Guo Hui Wu State Key Laboratory of Information Photonics and Optical Communications School of Science.Beijing University of Posts and Telecommunications Beijing 100876China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences.Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Electrocatalysts for oxygen reduction reactions(ORR)and oxygen evolution reactions(OER)are highly crucial and challenging toward the energy storage and conversion technologies such as fuel cells,metal-air batteries and water *** replace noble-metal based catalysts and boost catalytic performance of carbon-based materials,we initially develop the nickel,phospho rus,sulfur and nitrogen co-modified mesoporous carbon(NiPS_(3)@NMC)as a bifunctional oxygen *** perfo rmance for ORR(half-wave potential at 0.90 V)and OER(10 mA cm^(-2)at 1.48 V)surpasses those of Pt/C coupled with IrO_(2)catalysts and most of the non-precious metal based bifunctional electrocatalysts reported in related ***,the electrochemical durability is also confirmed by accelerated durability tests(ADTs)and long-term chronoamperometry(CA)*** demonstrated that the interfacial effect between NiPS_(3)quantum sheets(QS s)and NMC substrates by thermal activation contributed to the enhanced oxygen electrode bifunctionality with more active sites,due to the electrons-donating from nickel,phosphorus and sulfur elements and relatively enriched pyridinic type *** excellent overall performance highlights the potential application of NiPS3 QSs and NMC composites as the materials on energy conversion and storage.

关键词： NiPS_(3)quantum sheets N-doped mesoporous carbon Bifunctional oxygen electrocatalysts Liquid exfoliation Thermal annealing

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Simpler and Greener Preparation of An In-Situ Polymerized Polyimide Anode for Lithium Ion Batteries

SSRN

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SSRN 2023年

作者： Zhang, Qiuyitong Xu, Yuexin Lv, Ning Li, Hanyang Wei, Zijie Tiana, Tian Wang, Yadong Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

A simplified and greener procedure for in-situ obtaining polyimide anode materials for lithium-ion battery electrodes is developed. The combined polyimide material synthesis and electrode preparation reduces the number of processing steps and treatment duration and decreases the energy required for heat treatment, solvent evaporation, and organic solvent use. More importantly, polymerization in situ on the electrode surface render the polyimide particles a sea urchin-like structure, leading to fast electrochemical kinetics, and significant improvement in discharge capacity and cycling performance compared with materials obtained using traditional procedures. Specific capacities of 1870 mAh g-1 and 2277 mAh g-1 at 30℃ and 60℃, respectively, are obtained. A capacity of 1774 mAh g-1 is retained after 500 cycles at high current density of 1000 mA g-1 at 60℃. This new preparation process not only simplifies the preparation process and makes it greener, but also significantly improves the battery performance, providing new possibilities for the preparation of high-performance low-cost lithium-ion battery electrodes. © 2023, The Authors. All rights reserved.

关键词： Solvents

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Multi-functionalized sites in metalated COFs film for chemiresistive gas sensing at room temperature

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Chemical Engineering Journal 2025年 514卷

作者： Mei, Aohan Zhou, Min Zhang, Wenyuan Bao, Yunan Liu, Yueli Chen, Wen State Key Laboratory of Silicate Materials for Architectures School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Wuhan Brilliant Tech Co. Ltd. Wuhan430205 China

Post-synthetic modification of covalent organic frameworks (COFs) has attracted much attention due to its simple introduction of metals and functional groups as active sites for diverse applications. However, the charge transport improvement and the functions of active sites in metalated COFs are so far ignored in gas sensors. Herein, Zn2+ is loaded on two kinds of sites on TpBpy COFs film by a simple photochemical synthesis. Zn2+ coordination improves the NH3 sensitivity by increasing the charge density and adsorption of ammonia molecules. DFT simulation and UPS result prove that the suitable adsorption configuration and work function of Zn@TpBpy COFs film play the key role for the gas sensing behavior. The as-fabricated Zn@TpBpy COFs gas sensors exhibit high sensitivity with linear response behavior and a low detection limit of 500 ppb. By comparing Zn@TpBpy with Cu@TpBpy COFs, the electron donating coordination structure from the fully occupied 3d orbital in Zn2+ boosts the response value and sensing speed, providing a novel insight into manipulating sensing behavior of metalated COFs films. © 2025 Elsevier B.V.

关键词： Chemical sensors

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