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Enhanced mechanical performance of gradient-structured cocrFeMnNi high-entropy alloys induced by industrial shot-blasting

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Rare Metals 2023年第3期42卷 982-993页

作者： Ming-Zhi Zhang Kun Zhang Kai-Kai song Xiao-Yu Zou Wei-Dong song Ke-Feng Li Li-Na hu Ze-Qun Zhang Jürgen Eckert Shenzhen Research Institute of Shandong University Shenzhen 518057China cAS Key Laboratory of Microgravity(National Microgravity Laboratory) Institute of MechanicsChinese Academy of SciencesBeijing100190China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209China Guangdong Institute of Materials and Processing Guangdong Academy of SciencesGuangzhou 510650China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan 250061China Erich Schmid Institute of Materials Science Austrian Academy of SciencesLeoben 8700Austria Department of Materials Science Montanuniversitat LeobenLeoben 8700Austria

In this study,cocrFeMnNi high-entropy alloys(hEAs)with a surface gradient nanostructure were produced using industrial shot blasting,which improved their mechanical properties compared to the untreated *** severely plastically deformed(SPD)surface layer had a multi-scale hierarchical structure with a high density of stacking faults,deformation nanotwins,and amorphous *** depth of the SPD layer steadily increased as the shot-blasting time *** differences in the microhardness and tensile strength before and after shotblasting demonstrated the significant effect of the SPD layer on the mechanical *** microhardness of the homogenized hEA was~5 *** comparison,the maximum microhardness of the specimens after 20 min of shot blasting was~8.0 GPa at the *** yield strength also improved by 178%,and a large ductility of~36%was *** nanograin boundary,stacking fault,and twin strengthening within the gradientnanostructured surface layer caused the strength to *** tensile deformation,strain concentration began at the surface of the specimen and gradually spread to the ***,the gradient-nanostructured surface layer with improved strain hardening can prevent early necking and ensure steady plastic deformation so that high toughness is achieved.

关键词： high-entropy alloy Shot blasting Gradient structure Mechanical property Deformation mechanism

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Particle agglomeration and inhibition method in the fluidized pyrolysis reaction of waste resin

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chinese Journal of chemical Engineering 2024年第3期67卷 135-147页

作者： congjing Ren Peng Zhang Qi song Zhengliang huang Yao Yang Yongrong Yang Ningbo Innovation center Zhejiang UniversityNingbo 315100China college of chemical and Biological Engineering Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang UniversityHangzhou 310027China

This work investigated the pyrolysis reaction of waste resin in a fluidized bed *** was found that the pyrolysis-generated ash would adhere to the surface of ceramic particles,causing particle agglomeration and *** kaolin could effectively inhibit the particle agglomeration during the fluidized pyrolysis reaction through physical isolation and chemical *** the one hand,kaolin could form a coating layer on the surface of ceramic particles to prevent the adhesion of organic ash generated by the pyrolysis of *** the other hand,when a sufficient amount of kaolin(-0.2%(mass))was added,the activated kaolin could fully contact with the Na+ ions generated by the pyrolysis of resin and react to form a high-melting aluminosilicate mineral(nepheline),which could reduce the formation of low-melting-point sodium sulfate and thereby avoid the agglomeration of ceramic particles.

关键词： Pyrolysis reaction of waste resin Fluidization Particle agglomeration Kaolin

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A Bioinspired Adhesive Sucker with Both Suction and Adhesion Mechanisms for Three-Dimensional Surfaces

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Journal of Bionic Engineering 2022年第6期19卷 1671-1683页

作者： Jing Li Zhenzhen song chuandong Ma Tonghang Sui Peng Yi Jianlin Liu college of Mechanical and Electrical Engineering China University of Petroleum(East China)Qingdao266580China college of Pipeline and civil Engineering China University of Petroleum(East China)Qingdao266580China

There are significant advantages to investigate underwater attachments,which would be valuable in providing inspirations and design strategies for multi-functional surfaces and underwater ***,an abalone-inspired sucker integrating an elastic body and a membrane structure is proposed and fabricated filled with rigid quartz particles to adjust the backing stiffness of the contact like *** membrane is used to conform and contact surfaces well,the center area of which can be pulled in exposed to a negative pressure differential,to create a suction *** pulling experiments indicate that the sucker can adhere to three-dimensional surfaces with both suction and adhesion mechanisms in both dry and liquid *** switching between soft/hard contact states leads to the change of adhesive strength over 30 ***,we provide theoretical analysis on how the sucker work well in both dry and liquid ***,the developed sucker can easily lift up smooth planar objects and 3D objects,and can grip objects both smaller and larger than the size of the sucker,which have a difficulty for conventional suckers or friction-based *** potential application of the sucker in flexible transfer robot is demonstrated on various surfaces and environments,paving the way for further bio-inspired adhesive designs for both dry and wet scenarios.

关键词： Adhesion Sucker Abalone Suction Jamming Bioinspired

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Effect of ketamine on aquaporin-4 expression and neuronal apoptosis in brain tissues following brain injury in rats

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Neural Regeneration Research 2006年第4期1卷 313-316页

作者： Zangong Zhou Xiangyu Ji Li song Jianfang song Shiduan Wang Yanwei Yin Department of Anesthesiology the Medical School Hospital ofQingdao University Qingdao266003 Shandong ProvinceChina

BAcKGROUND： Aquaporin-4 （AQP-4） is closely related to the formation of brain edema. Neuronal apoptosis plays an important part in the conversion of swelled neuron following traumatic brain injury. At present, the studies on the protective effect of ketamine on brain have involved in its effect on aquaporin-4 expression and neuronal apoptosis in the brain tissues following brain injury in rats. OBJEcTIVE： To observe the effect of ketamine on AQP-4 expression and neuronal apoptosis in the brain tissue following rat brain injury, and analyze the time-dependence of ketamine in the treatment of brain injury.DESIGN： Randomized grouping design, controlled animal tria SETTING ： Department of Anesthesiology, the Medical School hospital of Qingdao University MATERIALS： Totally 150 rats of clean grade, aged 3 months, were involved and randomized into control group and ketamine-treated group, with 75 rats in each. Each group was divided into 5 subgroups separately at 6,12, 24, 48 and 72 hours after injury, with 15 rats at each time point. Main instruments and reagents： homemade beat machine, ketamine hydrochloride （hengrui Pharmaceutical Factory, Jiangsu）, rabbit anti-rat AQP-4 polyclonal antibody, SABc immunohistochemical reagent kit and TUNEL reagent kit （Boster co.,Ltd., Wuhan）. METhODS： This trial was carried out in the Institute of cerebrovascular Disease, Medical college of Qingdao University during March 2005 to February 2006. A weight-dropping rat model of brain injury was created with Feeney method. The rats in the ketamine-treated group were intraperitoneally administered with 50 g/L ketamine （120 mg/kg） one hour after injury, but ketamine was replaced by normal saline in the control group. In each subgroup, the water content of cerebral hemisphere was measured in 5 rats chosen randomly. The left 10 rats in each subgroup were transcardiacally perfused with ketamine, then the brain tissue was made into paraffin sections and stained by haematoxylin and eosin.

关键词： Effect of ketamine on aquaporin-4 expression and neuronal apoptosis in brain tissues following brain injury in rats

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high performance Zn-I_(2)battery with acetonitrile electrolyte working at low temperature

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Nano Research 2022年第4期15卷 3170-3177页

作者： chunlai song Zongshuai Gong chong Bai Fengshi cai Zhihao Yuan Xizheng Liu School of Materials Science and Engineering Tianjin Key Laboratory of Photoelectric Materials&DevicesKey Laboratory of Display Materials and Photoelectric Devices of Ministry of EducationTianjin University of TechnologyNo.391 Binshuixi RoadTianjin 300384China

Large scale applications of metal-iodine batteries working at sub-zero degree have been challenged by the limited capacity and performance ***,we firstly propose a Zn-I_(2)battery working at low temperature with a carbon composite material/iodine(ccM-I_(2))cathode,a Zn anode and an environmentally tolerable Zn(clO4)2-AcN *** ccM framework with hierarchical porous structure endows a powerful iodine-anchoring to overcome undesirable dissolution of iodine in organic electrolyte,and the Zn(clO4)2-AcN electrolyte with low freezing point and high ionic conductivity enhances the low temperature *** synergies enable an efficiently reversible conversion of Zn-I_(2)battery even at-40℃.Therefore,the resultant Zn-I_(2)battery delivers a high specific capacity of 200 mAh·g^(-1),which is fairly approximate to the theoretical capacity of I_(2)(211 mAh·g^(-1))and a superior cycling stability with minimal capacity fading of 0.00043%per cycle over 7,000 times under 2c at-20℃.Furthermore,even at-40℃,this Zn-I_(2)battery still exhibits a good capacity retention of 68.7%compared to the capacity at 25℃ and a rapid capacity-recover ability with elevating temperature *** results distinctly indicate this Zn-I_(2)battery can be 1competent for the practical application under low temperature operation.

关键词： Zn-I_(2)battery low temperature acetonitrile electrolyte carbon composite material high performance

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Performance Analysis of the Effects of Microgrooved Surface on A Marine current Turbine with Underwater Mooring Platform

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china Ocean Engineering 2022年第5期36卷 755-766页

作者： DANG Zhi-gao MAO Zhao-yong song Bao-wei YANG Guang-yong School of New Energy Nanjing University of Science and TechnologyJiangyin 214443China School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory for Unmanned Underwater Vehicle Northwestern Polytechnical UniversityXi’an 710072China Unmanned System Research Institute Northwestern Polytechnical UniversityXi’an 710072China

Marine current turbine(McT),which is designed for the power supply of underwater mooring platform(UMP),is investigated in this *** reduce its flow noise,the microgrooved surface is applied at the suction surface of the turbine *** analyses of the effects of the UMP on McT with microgrooved surface in different working conditions are *** transient turbulent flow field is obtained by incompressible large eddy simulation(LES),and then the Ffowcs Williams and hawkings(FW-h)acoustic analogy is adopted to forecast the flow noise generated from the pressure fluctuations and loadings of the UMP shell and McT blade *** numerical methods are first validated with experimental data and good agreements are ***,the influence of several key parameters on the performance of the McT is then systematically studied,including interval distance,angle of pitch and angle of *** each case,the hydrodynamic parameters(thrust coefficient,torque coefficient and power coefficient),the vortical structures behind the model and the overall sound pressure level(OASPL)directionality are ***,the noise reduction effect of the microgrooved surface is also *** present investigation could provide an overall understanding for the performance of McT combined with UMP.

关键词： marine current turbine underwater mooring platform microgrooved surface large eddy simulation flow noise

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An Edge Visual Incremental Perception Framework Based on Deep Semi-supervised Learning for Monitoring Power Transmission Lines

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cSEE Journal of Power and Energy Systems 2023年第2期9卷 759-768页

作者： Jun Zhang Jiye Wang Rui song Guozheng Peng Tianjiao Pu Shuhua Zhang college of Electrical and Information Engineering Hunan UniversityChangsha 410082China china Electric Power Research Institute Beijing 100192China

In recent years,several efforts have been made to develop power transmission line abnormal target detection models based on edge ***,updates to these models rely on participation of the cloud,which means that network resource shortages can lead to update failures,followed by unsatisfactory recognition and detection performance in practical *** address this problem,this article proposes an edge visual incremental perception framework,based on deep semisupervised learning,for monitoring power transmission *** generation of the initial model using a small amount of labeled data,models trained using this framework can update themselves based on unlabeled data.A teacher-student joint training strategy,a data augmentation strategy,and a model updating strategy are also designed and adopted to improve the performance of the models trained with this *** proposed framework is then examined with various transmission line datasets with 1%,2%,5%,and 10%labeled *** performance enhancement is thus confirmed against traditional supervised learning *** the 10%labeled data training set,the recognition accuracy of the model is improved to exceed 80%,meeting the practical needs of power system operation,and thus clearly validating the effectiveness of the framework.

关键词： Edge intelligence semi-supervised learning transmission lines monitoring visual incremental perception

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comparison of edge cracking and tensile cracking in in-situ deformation at 150℃of Mg-2Zn-1.5Mn alloy sheet

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Journal of Materials Science & Technology 2022年第17期112卷 24-35页

作者： Qiang Liu Jiangfeng song Yuanding huang Bin Jiang Biquan Xiao Fusheng Pan National Engineering Research center for Magnesium Alloys Chongqing UniversityChongqing 400044China MagIc-Magnesium innovation centre Helmholtz-Zentrum GeesthachtMax-Planck-Str.121502 GeesthachtGermany

The Mg-2Zn-1.5Mn alloy(ZM21)sheets were hot-rolled in a single pass at 150℃with different reductions through on-line heating *** and edge cracking behavior of the rolled sheets were *** in-situ tensile tests at 150℃were also carried out,the crack initiation and propagation were compared with the edge cracking behavior of ZM21 sheets prepared by on-line heating *** results reveal that the edge cracks are most likely to originate in the rolling direction and normal direction(RD-ND)plane due to the secondary tensile stress along *** cracking becomes more severe with an increasing *** edge cracks mainly initiate and propagate in the fine recrystallized grain areas and the junction of recrystallized grains and sub-grains with hard *** in-situ tensile test indicates that micro-cracks mainly initiate at the triple junction of grain boundaries where grains have hard orientation with low basal Schmid factor(SF).Meanwhile,those cracks are more likely to propagate along the grain boundaries with maximum difference in basal Schmid ***,the crack initiation and propagation during the in-situ tensile deformation at 150℃are found not to be associated with the recrystallization.

关键词： ZM21 Mg alloy On-line heating rolling In-situ tensile test Edge crack

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Empowering magnetic strong coupling and its application for nonlinear refractive index sensing

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Nano Research 2022年第8期15卷 7604-7613页

作者： song Sun Dong Li Dacheng Wang Zheng Feng Wei Tan Lin Wu Microsystem and Terahertz Research center China Academy of Engineering PhysicsChengdu 610200China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China Science Mathematics and Technology(SMT)Singapore University of Technology and Design(SUTD)8 Somapah RoadSingapore 487372Singapore Institute of high Performance computing A*STAR(Agency for ScienceTechnology and Research)1 Fusionopolis Way#16-16 ConnexisSingapore 138632Singapore

In the context of quantum strong coupling,the magnetic dipole(MD)emitters are largely overlooked due to the rarity of MD source and the non-magnetic nature of matters at high *** on a semi-classic model,we theoretically demonstrate magnetic strong coupling between an MD cluster(Er^(3+):4 I13/2→4 I15/2 transition at 1,550 nm)and an antenna-in-cavity *** is found that placing the plasmonic diabolo/s-diabolo nanoantenna,which supports strong electric/magnetic dipole mode,inside a dielectric cavity could largely improve the strong coupling coefficient while suppressing the cavity loss rate compared to the bare nanoantenna counterparts,empowering the magnetic quantum strong coupling at a level of 104 emitters,which is remarkable considering the weak MD dipole momentum and small hotspot region at high ***,the two Rabi resonance branches undergo highly asymmetrical changes upon a small variation on the environmental refractive index,which leads to an exotic exponential sensitivity profile by tracing the ratio between the two resonances *** proposed magnetic strong coupling for nonlinear refractive index sensing may add a new category to quantum plasmonic sensors.

关键词： nanoplasmonic cavity magnetic dipole emitter strong coupling Rabi-splitting sensing

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Simultaneous generation of electricity, ethylene and decomposition of nitrous oxide via protonic ceramic fuel cell membrane reactor

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Journal of Energy chemistry 2023年第2期77卷 359-368,I0010页

作者： song Lei Ao Wang Guowei Weng Ying Wu Jian Xue haihui Wang Guangdong Provincial Key Lab of Green chemical Product Technology School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640GuangdongChina Beijing Key Laboratory for Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China School of chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006GuangdongChina

Ethylene,one of the most widely produced building blocks in the petrochemical industry,has received intense *** production,using electrochemical hydrogen pump-facilitated nonoxidative dehydrogenation of ethane(NDE)to ethylene,is an emerging and promising route,promoting the transformation of the ethylene industry from energy-intensive steam cracking process to new electrochemical membrane reactor *** this work,the NDE reaction is incorporated into a BaZr_(0.1)ce_(0.7)Y_(0.1)Yb_(0.1)O_(3-δ)electrolyte-supported protonic ceramic fuel cell membrane reactor to co-generate electricity and ethylene,utilizing the Nb and cu doped perovskite oxide Pr_(0.6)Sr_(0.4)Fe_(0.8)Nb_(0.1)cu_(0.1)O_(3-δ)(PSFNcu)as anode catalytic *** to the doping of Nb and cu,PSFNcu was endowed with high reduction tolerance and rich oxygen vacancies,showing excellent NDE catalytic *** maximum power density of the assembled reactor reaches 200 mW cm^(-2)at 750℃,with high ethane conversion(44.9%)and ethylene selectivity(92.7%).Moreover,the nitrous oxide decomposition was first coupled in the protonic ceramic fuel cell membrane reactor to consume the permeated *** a result,the generation of electricity,ethylene and decomposition of nitrous oxide can be simultaneously obtained by a single ***,the maximum power density of the cell reaches 208 mW cm^(-2)at 750℃,with high ethane conversion(45.2%),ethylene selectivity(92.5%),and nitrous oxide conversion(19,0%).This multi-win technology is promising for not only the production of chemicals and energy but also greenhouse gas reduction.

关键词： Nonoxidative dehydrogenation of ethane Ethylene Nitrous oxide decomposition Protonic ceramic fuel cell membrane reactor Perovskite oxide

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