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journal of Materials Science & Technology 2021年第6期65卷 210-215页

作者： yu Han Huabing Li Hao Feng Kemei Li Yanzhong Tian Zhouhua jiang School of Metallurgy Northeastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

The effect of nitrogen on microstructural evolution and tensile properties of transformation-induced plasticity(TRIP)Fe_(50)Mn_(30)Co_(10)Cr_(10)HEAs was *** was fully introduced in solid solution by pressure-induced melting *** addition turned the TRIP alloy to a twinning-induced plasticity(TWIP)alloy,and simultaneously improved the strength and *** the nitrogen-doped HEA,the high yield strength is mainly resulted from the friction stress via interstitial strengthening effect,and the high ductility is originated from retained high strain-hardening capability via the successive onset of dislocation accumulation and deformation *** strain-hardening behavior and microstructural evolution at specified strains were revealed.

关键词： High-entropy alloy(HEA) Transformation-induced plasticity(TRIP) Twinning-induced plasticity(TWIP) Strength Ductility

Quantitative mechanisms behind the high strength and electrical conductivity of Cu-Te alloy manufactured by continuous extrusion

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journal of Materials Science & Technology 2022年第26期121卷 9-18页

作者： Qianqian Fu Bing Li Minqiang Gao Ying Fu Rongzhou yu Changfeng Wang Renguo Guan Liaoning Key Laboratory of Near-Net Shape Forming of Light Metal Materials Dalian Jiaotong UniversityDalian 116028China Shanxi Datong University Datong 037009China Engineering Research Center of Continuous Extrusion Ministry of EducationDalian Jiaotong UniversityDalian 116028China Songshan Lake Materials Laboratory Dongguan 523808China

The microstructure,mechanical performance,and electrical conductivity of Cu-Te alloy fabricated by continuous extrusion were quantitatively *** results demonstrate that the grain size of the Cu-Te alloy is refined significantly by incomplete dynamic *** Cu2Te phase stimulates recrystallization and inhibits subgrain *** extrusion,the tensile strength increases from217.8±4.8 MPa to 242.5±3.7 MPa,the yield strength increases from 65.1±3.5 MPa to 104.3±3.8 MPa,and the yield to tensile strength ratio is improved from 0.293±0.015 to 0.43±.0.091,while the electrical conductivity of room temperature decreases from 95.8±0.38%International Annealed Cu Standard(IACS)to 94.0%±0.32%*** quantitative analysis shows that the increment caused by dislocation strengthening and boundary strengthening account for 84.6%of the yield strength of the extruded Cu-Te alloy and the electrical resistivity induced by grain boundaries and dislocations accounts for 1.6%of the electrical resistivity of the extruded Cu-Te *** and boundaries contribute greatly to the increase of yield strength,but less to the increase of electrical resistivity.

关键词： Cu-Te alloy Continuous extrusion Microstructure Electrical conductivity Yield strength

Reviewing electrochemical stability of ionic liquids-/deep eutectic solvents-based electrolytes in lithium-ion,lithium-metal and post-lithium-ion batteries for green and safe energy

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Green Energy & Environment 2024年第6期9卷 966-991页

作者： yu Chen Shuzi Liu Zixin Bi Zheng Li Fengyi Zhou Ruifen Shi Tiancheng Mu Department of Chemistry and Material Science Langfang Normal UniversityNO.100 Aimin West RoadLangfangHebei065000China Department of Chemistry Renmin University of ChinNO.59 Zhongguancun StreetHaidian DistrictBeijing100872China

Sustainable energy is the key issue for the environment protection,human activity and economic *** liquids(ILs)and deep eutectic solvents(DESs)are dogmatically regarded as green and sustainable electrolytes in lithium-ion,lithium-metal(e.g.,lithium-sulphur,lithium-oxygen)and post-lithium-ion(e.g.,sodium-ion,magnesium-ion,and aluminum-ion)*** electrochemical stability of ILs/DESs is one of the prerequisites for green,sustainable and safe energy;while easy electrochemical decomposition of ILs/DESs would be contradictory to the concept of green chemistry by adding the cost,releasing volatile/hazardous by-products and hindering the ***,(1)are ILs/DESs-based electrolytes really electrochemically stable when they are not used in batteries?(2)are ILs/DESs-based electrolytes really electrochemically stable in real batteries?(3)how to design ILs/DESs-based electrolytes with high electrochemical stability for batteries to achieve sustainability and green development?Up to now,there is no summary on this topic,to the best of our ***,we review the effect of chemical structure and non-structural factors on the electrochemical stability of ILs/DESs in simulated *** importantly,electrochemical stability of ILs/DESs in real lithium-ion,lithium-metal and post-lithium-ion batteries is concluded and ***,the strategies to improve the electrochemical stability of ILs/DESs in lithium-ion,lithium-metal and post-lithium-ion batteries are *** review would provide a guide to design ILs/DESs with high electrochemical stability for lithium-ion,lithium-metal and postlithium-ion batteries to achieve sustainable and green energy.

关键词： Green solvents Decomposition Sustainable chemistry Lithium-oxygen batteries Lithium-sulphur batteries Sodium-ion batteries

Application of Ice Pigging in a Drinking Water Distribution System:Impacts on Pipes and Bulk Water Quality

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Engineering 2024年第9期40卷 122-130页

作者： yujing Huang Zhiwei Chen Guilin He yu Shao Shuang Song Feilong Dong Tuqiao Zhang College of Civil Engineering and Architecture Zhejiang UniversityHangzhou 310027China Suzhou Wuzhong Water Co. Ltd.Suzhou 215128China School of Municipal and Environmental Engineering Shandong Jianzhu UniversityJi’nan 250101China College of Environment Zhejiang University of TechnologyHangzhou 310014China

Ice pigging is an emerging technique for pipe cleaning in drinking water distribution ***,substantial confusion and controversy exist on the potential impacts of ice pigging on bulk water *** study monitored the microstructural features and composition of sediments and microbial community structures in bulk water in eight multimaterial Chinese *** concentration analysis demonstrated that separate cleaning of pipes with different materials in complex networks could mitigate the risk of losing ice pigs and degrading water *** microstructural and trace element characterization results showed that ice pigs would scarcely disturb the inner surfaces of long-used *** bacterial richness and diversity of bulk water decreased significantly after ice ***,correlations were established between pipe service age,temperature,and chloride and total iron concentrations,and the 15 most abundant taxa in bulk water,which could be used to guide practical ice pigging operations.

关键词： Ice pigging Pipe cleaning Drinking water distribution system Bacterial community Sediments

Multi-fracture interactions during two-phase flow of oil and water in deformable tight sandstone oil reservoirs

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journal of Rock Mechanics and Geotechnical Engineering 2020年第4期12卷 821-849页

作者： Yongjun yu Wancheng Zhu Lianchong Li Chenhui Wei Baoxu Yan Shuai Li Center for Rock Instability and Seismicity Research Northeastern UniversityShenyang110819China

Tight oil reservoirs are complex geological materials composed of solid matrix,pore structure,and mixed multiple phases of fluids,particularly for oil reservoirs suffering from high content of in situ pressurized water found in *** this regard,a coupled model considering two-phase flow of oil and water,as well as deformation and damage evolution of porous media,is proposed and validated using associated results,including the oil depletion process,analytical solution of stress shadow effect,and physical experiments on multi-fracture interactions and fracture propagation in unsaturated seepage ***,the proposed model is used to study the behavior of multi-fracture interactions in an unsaturated reservoir in presence of water and *** results show that conspicuous interactions exist among multiple induced *** behavior varies from extracted geological profiles of the reservoir due to in situ stress *** differential pressures of water and that of oil in different regions of reservoir affect interactions and trajectories of multi-fractures to a considerable *** absolute value of reservoir average pressure is a dominant factor affecting fracture interactions and in favor of enhancing fracture network *** addition,difference of reservoir average pressures in different regions of reservoir would promote the fracturing *** affecting fracture interactions and reservoir treatment effectiveness are quantitatively estimated through stimulated reservoir *** study confirms the significance of incorporating the two-phase flow process in analyses of multifracture interactions and fracture trajectory predictions during tight sandstone oil reservoir developments.

关键词： Multi-fracture interactions Two-phase flow Porous media deformation Hydraulic fracturing Continuum damage mechanics

Preparation of Ti-based Yb-doped SnO_(2)-RuO_(2) electrode and electrochemical oxidation treatment of coking wastewater

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journal of Rare Earths 2022年第5期40卷 763-771,I0003页

作者： Weida Wang Ke Wang Wenting Hao Tingting Zhang Yijie Liu Linghong yu Weiping Li School of Energy and Environment Inner Mongolia University of Science and TechnologyBaotou 014010China School of Environmental and Municipal Engineering Xi’an University of Architecture and TechnologyXi'an 710055China MCC Northwest Engineering Technology Co. Ltd.Baotou 014010China

In this study,the Ti/SnO_(2)-RuO_(2) electrodes with different Yb contents were prepared by sol-gel method and thermal decomposition method,and the surface morphology and crystal structure of the electrodes were characterized by scanning electron microscopy(SEM),atomic force microscopy(AFM) and x-ray diffraction(xRD),the electrochemical properties of the electrodes were tested by linear sweep voltammetry(LSV) and cyclic voltammetry(CV).The electrochemical oxidation device was constructed with Yb-doped Ti/SnO_(2)-RuO_(2) electrode as the anode and titanium plate as the cathode,and the electrochemical oxidation effect and product changes of the anode on co king wastewater were *** results show that the surface of the electrode is flat with high crystallinity of SnO_(2) and RuO_(2) crystals at1.5% Yb doping,and the LSV and CV curves indicate that the Yb doping of 1.5% increases the oxygen precipitation potential and electrocatalytic oxidation activity of the *** the electrode with Yb doping of 1.5% is the anode with current density of 10 mA/cm^(2) electrochemical oxidation time of 30 min,the electrode can remove chemical oxygen demand(COD) up to 85.06%,total organic carbon(TOC) up to 60.59% and UV_(254) from 1.594 to 0.507 for coking *** chromatography(GC-MS),UV-vis and three-dimensional fluorescence results of coking wastewater before and after treatment show that large toxic substances in coking wastewater are degraded to low toxic organic substances,and most soluble organic substances are degraded and *** study provides the possibility of basic research for the engineering practice of electrochemical oxidation for the treatment of coking wastewater.

关键词： Yb Ti/SnO_(2)-RuO_(2) Electrochemical oxidation Coking wastewater

In situ generation of Li_(3)N concentration gradient in 3D carbon-based lithium anodes towards highly-stable lithium metal batteries

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journal of Energy Chemistry 2023年第1期76卷 648-656,I0016页

作者： Wenzhu Cao Weimin Chen Mi Lu Cheng Zhang Du Tian Liang Wang Faquan yu Key Laboratory for Green Chemical Process of Ministry of Education Hubei Key Laboratory for Novel Reactor and Green Chemistry TechnologyHubei Engineering Research Center for Advanced Fine ChemicalsSchool of Chemical Engineering and PharmacyWuhan Institute of TechnologyWuhan 430205HubeiChina Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

The uncontrolled dendrite growth of lithium metal anodes(LMAs)caused by unstable anode/electrolyte interface and uneven lithium deposition have impeded the practical applications of lithium metal batteries(LMBs).Constructing a robust artificial solid electrolyte interphase(SEI)and regulating the lithium deposition behavior is an effective strategy to address these ***,a three-dimensional(3D)lithium anode with gradient Li_(3)N has been in-situ fabricated on carbon-based framework by thermal diffusion method(denoted as CC/Li/Li_(3)N).Density functional theory(DFT)calculations reveal that Li_(3)N can effectively promote the transport of Li^(+)due to the low energy barrier of Li^(+)*** expected,the Li_(3)N-rich conformal artificial SEI film can not only effectively stabilize the interface and avoid parasitic reactions,but also facilitate fast Li^(+)transport across the SEI *** anode matrix with uniformly distributed Li3N can enable homogenous deposition of Li,thus preventing Li dendrite *** from these merits,the CC/Li/Li_(3)N anode achieves ultralong-term cycling for>1000 h at a current density of 2 m A cm^(-2)and dendrite-free Li deposition at an ultrahigh rate of 20 m A cm^(-2).Moreover,the full cells coupled with LiFePO4cathodes show extraordinary cycling stability for>300 cycles in liquidelectrolyte-based batteries and display a high-capacity retention of 96.7%after 100 cycles in solid-state cells,demonstrating the promising prospects for the practical applications of LMBs.

关键词： Li_(3)N Gradient Three-dimensional host Interphase Lithium metal anode

Thermochemical non-equilibrium flow characteristics of high Mach number inlet in a wide operation range

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Chinese journal of Aeronautics 2023年第12期36卷 164-184页

作者： Chunliang DAI Bo SUN Lianjie yuE Shengbing ZHOU Changfei ZHUO Changsheng ZHOU jianyi yu School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of High Temperature Gas Dynamics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China College of Aerospace Engineering Chongqing UniversityChongqing 400044China Beijing System Design Institute of Electro-mechanic Engineering Beijing 102308China

The high-temperature non-equilibrium effect is a novel and significant issue in the flows over a high Mach number(above Mach 8)air-breathing ***,this study attempts to investigate the high-temperature non-equilibrium flows of a curved compression two-dimensional scramjet inlet at Mach 8 to 12 utilizing the two-dimensional non-equilibrium RANS ***,the thermochemical non-equilibrium gas model can predict the actual high-temperature flows,and the numerical results of the other four thermochemical gas models are only used for comparative ***,the thermochemical non-equilibrium flow fields and work performance of the inlet at Mach 8 to 12 are ***,the influences of high-temperature non-equilibrium effects on the starting characteristics of the inlet are *** results reveal that a large separation bubble caused by the cowl shock/lower wall boundary layer interaction appears upstream of the shoulder,at Mach *** separation zone size is smaller,and its location is closer to the downstream area while the thermal process changes from frozen to non-equilibrium and then to *** the increase of inflow Mach number,the thermochemical non-equilibrium effects in the whole inlet flow field gradually strengthen,so their influences on the overall work performance of the high Mach number inlet are more *** vibrational relaxation or thermal non-equilibrium effects can yield more visible influences on the inlet performance than the chemical non-equilibrium *** inlet in the thermochemical non-equilibrium flow can restart more easily than that in the thermochemical frozen *** work should provide a basis for the design and starting ability prediction of the high Mach number inlet in the wide operation range.

关键词： Non-equilibrium Scramjet inlet Starting ability Thermochemical Work performance

An interface shear damage model of chromium coating/steel substrate under thermal erosion load

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Defence Technology（防务技术） 2021年第2期17卷 405-415页

作者： xiao-long Li Yong Zang Yong Lian Min-yu Ma Lei Mu Qin Qin School of Mechanical Engineering University of Science and Technology BeijingBeijing100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing100083China Beijing Key Laboratory for Corrosion Erosion and Surface TechnologyBeijing100083China

The Cr-plated coating inside a gun barrel can effectively improve the barrel’s erosion resistance and thus increase the service ***,due to the cyclic thermal load caused by high-temperature gunpowder,micro-element damage tends to occur within the Cr coating/steel substrate interface,leading to a gradual deterioration in macro-mechanical properties for the material in the related *** order to mimic this cyclic thermal load and,thereby,study the thermal erosion behavior of the Cr coating on the barrel’s inner wall,a laser emitter is utilized in the current *** the help of in-situ tensile test and finite element simulation results,a shear stress distribution law of the Cr coating/steel substrate and a change law of the interface ultimate shear strength are *** have shown that the Cr coating/steel substrate interface’s ultimate shear strength has a significant weakening effect due to increasing *** this study,the interfacial ultimate shear strength decreases from 2.57 GPa(no erosion)to 1.02 GPa(laser power is 160 W).The data from this experiment is employed to establish a Cr coating/steel substrate interface shear damage *** this model is used to predict the flaking process of Cr coating by finite element *** simulation results show that the increase of coating crack spacing and coating thickness will increase the service life of gun barrel.

关键词： Cr coating/steel substrate Thermal erosion Finite element simulation Ultimate shear strength Interface shear damage model

A cellular automata framework for porous electrode reconstruction and reaction-diffusion simulation

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Chinese journal of Chemical Engineering 2023年第8期60卷 262-274页

作者： jindong Dai Chi Zhai jiali Ai Guangren yu Haichao Lv Wei Sun Yongzhong Liu College of Chemical Engineering Beijing University of Chemical TechnologyBeijing 100029China Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China Department of Chemical Engineering Xi’an Jiaotong UniversityXi’an 710049China

Due to the high charge transfer efficiency compared to that of non-porous materials,porous electrodes with larger surface area and thinner solid pore walls have been widely applied in the lithium-ion battery *** the capacity and charge-discharge efficiency of batteries are closely related to the microstructure of porous materials,a conceptually simple and computationally efficient cellular automata(CA)framework is proposed to reconstruct the porous electrode structure and simulate the reactiondiffusion process under the irregular solid-liquid boundary in this *** framework is consisted of an electrode generating model and a reaction-diffusion *** structures with specific geometric properties,i.e.,porosity,surface area,size distribution,and eccentricity distribution can be constructed by the electrode generating *** reaction-diffusion model is exemplified by solving the Fick's diffusion problem and simulating the cyclic voltammetry(CV)*** discharging process in the lithium-ion battery are simulated through combining the above two CA models,and the simulation results are consistent with the well-known pseudo-two-dimensional(P2D)*** addition,a set of electrodes with different microstructures are constructed and their reaction efficiencies are *** results indicate that there is an optimum combination of porosity and particle size for discharge *** framework is a promising one for studying the effect of electrode microstructure on battery performance due to its fully synchronous computation way,easy handled boundary conditions,and free of convergence concerns.

关键词： Mathematical modeling Lithium-ion battery Cellular automata Diffusion Electrochemistry Dynamic simulation