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The influence of clusters in the melt of Fe80Si10B10 alloy on the subsequent glass-formation

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Progress in Natural Science:Materials International 2013年第2期23卷 216-219页

作者： Bangshao dong Shaoxiong Zhou jingyu Qin Shaopeng Pan Zhengbang Li China Iron & Steel Research Institute Group Advanced Technology & Materials Co. Ltd. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) Shandong University China Iron & Steel Research Institute Group

The structure of Fe80Si10B10 alloy melt was investigated by ab initio molecular dynamic simulation from the local atomic environments. It presents that Fe80Si10B10 alloy can be considered as the combination of B-centered prism-like clusters and bcc-like Fe-Si solid solution. The poor glass-forming ability of the alloy has been investigated and can be attributed to the bcc-like environment around Si atoms and the relative high content of pure Fe clusters.

关键词： Metallic glasses Alloy melt Clusters Liquid structure Glass-forming ability

Microstructure and Mechanical Properties of Electromagnetic Centrifugal Cast 1Cr25Ni20Si2 Tube Blank

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journal of Iron and Steel Research International 2006年第1期13卷 67-69页

作者： QIU Yi-qing jIA Guang-lin LIU Xiang-hua WANG Guo-dong State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

1Cr25Ni20Si2 tube blank centrifugally cast in a steady magnetic field was investigated. The results indicated that the solidification structure and the mechanical properties of the blank can be improved remarkably by ... 详细信息

关键词： centrifugal casting steady magnetic field solidification structure mechanical property electromagnetic stirring

Carbide precipitates and mechanical properties of medium Mn steel joint with metal inert gas welding

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journal of Materials Science & Technology 2021年第16期75卷 48-58页

作者： jiang Yang honggang dong Yueqing Xia Peng Li Xiaohu hao Yaqiang Wang Wei Wu Baosen Wang School of Materials Science and Engineering Dalian University of TechnologyDalian 116024China Baosteel Central Research Institute Baoshan Iron&Steel Co.Ltd.Shanghai 200431China

Medium Mn steel was metal inert gas(MIG)welded with NiCrMo-3 and 307 Si filler *** effect of filler wires on the microstructure and mechanical properties of joint was investigated,and the carbide precipitates were contrastively *** results revealed that the microstructure of weld metal,heat-affected zone and base metal are *** grain coarsening occurred in the heat-affected zone(hAZ),and the maximum grain size grew up to 160μ*** hAZ,C and Cr segregated at grain boundaries,the carbides was identified as Cr7 *** dispersive(Nb,Mo)C phase was also found in weld metal with NiCrMo-3 filler *** the welded joints failed in hAZ during tensile *** tensile strength of welded joint with NiCrMo-3 filler wire was 675 MPa,which is much higher than that with307 Si filler *** comparison to base metal,higher microhardness and lower impact toughness were obtained in hAZ for these two welded joints,which was attributed to the precipitation of Cr7 C3 phase and grain *** impact toughness around the fusion line is the worst for these two welded joints.

关键词： Medium Mn steel MIG welding Microstructure Precipitate Mechanical property

Electrodeposited synthesis of self-supported Ni-P cathode for efficient electrocatalytic hydrogen generation

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Progress in Natural Science:Materials International 2016年第3期26卷 303-307页

作者： Ruixian Wu Yuming dong Pingping jiang Guangli Wang Yanmei Chen Xiuming Wu Key Laboratory of Food Colloids and Biotechnology (Ministry of Education of China) School of Chemical and Material Engineering Jiangnan University

One of the key challenges for electrochemical water splitting is the development of low-cost and efficient hydrogen evolution cathode. In this work, a self-supported Ni-P cathode was synthesized by a facile electrodeposition method. The composition and morphology were characterized by X-ray diffraction,X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron *** Ni-P cathode performed low onset over-potential, good catalytic activity and long-term stability under neutral and alkaline conditions. The mechanism of Ni-P electrode for hydrogen production was discussed by electrochemical impedance spectroscopy. The excellent performance of Ni-P cathode was mainly attributed to the synergistic effect of phosphate anions and the self-supported feature.

关键词： Nickel phosphorus Self-supported Electrodeposition hydrogen production

A novel lead-free relaxor with endotaxial nanostructures for capacitive energy storage

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SusMat 2024年第1期4卷 116-125页

作者： Xiaoyan dong Tengfei hu XiaojunWu jie Yin Zhengqian Fu jiagang Wu College of Materials Science and Engineering Sichuan UniversityChengduP.R.China Analysis and Testing Center for Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiP.R.China

Dielectric capacitors with a fast charging/discharging rate,high power density,and long-term stability are essential components in modern electrical ***,miniaturizing and integrating capacitors face a persistent challenge in improving their energy density(W_(rec))to satisfy the specifications of advanced electronic systems and *** this work,leveraging phase-field simulations,we judiciously designed a novel lead-free relaxor ferroelectric material for enhanced energy storage performance,featuring flexible distributed weakly polar endotaxial nanostructures(ENs)embedded within a strongly polar fluctuation *** matrix contributes to substantially enhanced polarization under an external electric field,and the randomly dispersed ENs effectively optimize breakdown phase proportion and provide a strong restoring force,which are advantageous in bolstering breakdown strength and minimizing ***,this relaxor ferroelectric system incorporating ENs achieves an exceptionally high W_(rec)value of 10.3 j/cm^(3),accompanied by a large energy storage efficiency(η)of 85.4%.This work introduces a promising avenue for designing new relaxor materials capable of capacitive energy storage with exceptional performance characteristics.

关键词： endotaxial nanostructure energy storage lead-free relaxor ferroelectric

Effects of manganese substitution on magnetic and magnetostrictive properties of Tb_(0.5)Dy_(0.5)(Fe_(1-x)Mn_(x))_(1.92)/epoxy composites with spherical single-crystal particles

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journal of Rare Earths 2023年第8期41卷 1211-1216,I0004页

作者： Dashun dong Geng Wei jin Qian Ye huang Li Zhang hehe Ding Yangguang Shi Shaolong Tang jiangsu Key Laboratory for Nanotechnology Collaborative Innovation Center of Advanced MicrostructuresNational Laboratory of Solid State MicrostructuresDepartment of PhysicsNanjing UniversityNanjing 210093China Key Laboratory of Aerospace Information Materials and Physics(MIIT) Department of Applied PhysicsNanjing University of Aeronautics and AstronauticsNanjing 210016China

Spherical Tb_(0.5)Dy_(0.5)(Fe_(1-x)Mn_(x))_(1.92)(x=0,0.05,0.10 and 0.15)single-crystal particles were *** magnetic anisotropy of the alloy decreases as x increases from 0 to ***,we prepared giant magnetostrictive composites with these spherical Tb_(0.5)Dy_(0.5)(Fe_(1-x)Mn_(x))_(1.92)single-crystal *** a consequence,well-orie nted Tb_(0.5)Dy_(0.5)(Fe_(1-x)Mn_(x))_(1.92)composites with 55 vol%Tb_(0.5)Dy_(0.5)(Fe_(1-x)Mn_(x))_(1.92)particles were *** Tb_(0.5)Dy_(0.5)(Fe_(0.9)Mn_(0.1))_(2)composite manifests a good low-field magnetostrictive property and saturation magnetostriction at an axial pressure of 10 MPa,λ_(‖,saturation)≈2100 ppm,which is larger than that of the commercially available Terfenol-D(1400-1800 ppm).The preparation of composites with single crystal spherical powders may be an effective solution of developing high-performance magnetostrictive composites.

关键词： Tb-Dy-Fe-Mn Spherical single-crystal powder Magnetostriction Magnetostrictive composites Rare earths

Experimental Investigation on Viscosity of CaO-MgO(-Al_2O_3)-SiO_2 Slags and Solid-liquid Mixtures

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journal of Iron and Steel Research International 2015年第12期22卷 1091-1097页

作者： ji-fang XU Li-juan SU dong ChEN jie-yu ZhANG Yao ChEN Shagang School of Iron and Steel Soochow University Shanghai Key Laboratory of Modern Metallurgy and Material Processing Shanghai University

The viscosities for the selected CaO-MgO-SiO2 and CaO-MgO Al2 O3-SiO2 slags were measured by rota- ting cylinder method in a wide temperature range from 1608 K to 1 823 K. The effects of temperature, slag basicity and Al2 O3 content were studied. The results indicated that the viscosity decreased with increasing the slag basicity at the same temperature. And the viscosities of the slag initially increased linearly with increasing Al2 O3 content in the slags and then decreased as the Al2 O3 content in the slags continued to increase. Al2 O3 addition has a more signifi- cant effect on the viscosity than slag basicity in the selected slags. Based on the experimental data and the fraction of solid phases calculated by the thermodynamic software, the effect of solid phases on slag viscosity was evaluated. The results indicated that the relationship between the relative viscosity and the volume fraction of solid phases esti- mated from the slag composition can be reasonable by allowing the inverse maximum fraction of solid particles to vary.

关键词： viscosity slag solid-liquid mixture model Al2 O3 content

Direction finding characteristics of the bio-sonar model of a big brown bat

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Chinese journal of Acoustics 2024年第3期43卷 380-395页

作者： WANG Feng LU Yuqing dong Yangze College of Information Science and Engineering Hohai UniversityNanjing211100 Southern Marine Science and Engineering Guangdong Laboratory Zhanjiang524000

A bionic model of bat bio-sonar is established through computer simulation in this study,with a focus on investigating itsorientation measurement performance.A model for simulating bat orientation perception is created via a binaural broadband interferometer,utilizing binaural interference *** model incorporates a convolutional neural network(CNN)to achieve extraction and perception of orientation ***,the principle of multi-frequency point defuzzification is elaborated upon in the *** simulation results reveal the proposed bionic model achieves a direction measurement accuracy of 0.87◦and 0.116◦in the rough search mode and precise search mode,respectively,at a signal-to-noise ratio of 25 *** model demonstrates high accuracy in orientation recognition and defuzzification *** to the technique that employs broad phase difference to determine target orientation information,the proposed model exhibits analogous direction finding efficiency but superior defuzzification capacity.

关键词： finding utilizing precise

Imidazolium group prompted alkaline anion-exchange membrane with high performance for efficient electrochemical CO_(2) conversion

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Green Energy & Environment 2023年第3期8卷 893-903页

作者： Min Wang Qianqian Zou Xueqi dong Nengneng Xu Rong Shao jianfei Ding Yidong Zhang jinli Qiao School of Chemistry and Chemical Engineering Yancheng Institute of TechnologyYancheng224051China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092College of Environmental Science and EngineeringDonghua University2999 Ren'min North RoadShanghai201620China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092China

Development of high-performance hydroxide-conductive membranes is a focus research subject owing to promising applications in electrochemical reduction of CO_(2)(eCO_(2)RR).however,few satisfactory membranes have been developed to maximize the performance of CO_(2) electrolyzers,despite its role as the core in regulating ion transport and preventing product crossover or fuel ***,we report the synthesis of alkaline anion-exchange membranes fabricated by poly(vinyl-alcohol)(PVA)and poly[(3-methyl-1-vinylimidazoliummethylsulfate)-co-(1-vinylpyrrolidone)](PQ44)for use in CO_(2) *** to the unique imidazolium ring structure coupled with a three-dimensional semiinterpenetrating porous internal architecture,the PVA/PQ44-Oh-membranes provide a high hydroxide conductivity(21.47 mS cm^(-1)),preferable mechanical property and thermal *** particular,the eCO_(2)RR used PVA/PQ44-Oh^(-) as electrolyte membrane realized a charming Faradaic efficiency(88%)and partial current density(29 mA cm^(-2))at0.96 VRhE and,delivered the excellent durability over 20 h electrolysis in 0.5 mol L^(-1) KhCO_(3) ***,it can even enable an ultrahigh current density beyond 100 mA cm^(-2) at^(-1).11 VRhE when the electrolyte was KOh instead,and produced the FEhCOOof 85%at a low potential of0.81 VRhE,superior to both commercial alkaline A201 and acidic Nafion117 membrane.

关键词： Alkaline anion-exchange membrane Imidazolium ring structure Semi-interpenetrating network CO_(2)electroreduction Formate production