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Research on the electrostatic spray characteristics of ethanol/n-butanol blended fuels 认领 引用
1
作者 Junxing Hou Yuqi Sun +1 位作者 Wenshuai Hu Yifan Liu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第5期94-101,共8页
This study investigated the electrostatic spray modes and characteristics of ethanol-butanol blended fuels E20,E40,E60,and E80.The effects of electrode spacing,ethanol blending ratio,fuel flow rate,and nozzle diameter... This study investigated the electrostatic spray modes and characteristics of ethanol-butanol blended fuels E20,E40,E60,and E80.The effects of electrode spacing,ethanol blending ratio,fuel flow rate,and nozzle diameter on the electrostatic spray performance were examined.The research results indicate that within the voltage range of 0—15 kV,ethanol exhibits electrostatic spray phenomena such as droplet,pulsed jet,cone-jet and multiple-jet in sequence,whereas n-butanol shows significantly poor electrostatic spray performance.With the increase in the ethanol-butanol blending ratio,the spray mode remains unchanged,but the critical voltage for each mode decreases.As the electrode spacing increases,the spray performance deteriorates.Within the voltage range of 7—8 kV,E20,E40,E60,and E80 exhibit a stable cone-jet mode.Additionally,as the ethanol blending ratio increases,both the spray cone angle and spray area increase.When the fuel flow rate increases from 0.1 to 0.3 ml·min-1,the electrostatic spray cone angle and spray area also increase.However,beyond 0.3 ml·min-1,no further increase is observed.When the nozzle diameter decreases from 1.05 mm to 0.50 mm,there is no significant change in the electrostatic spray cone angle or spray area. 展开更多
关键词 Electrostatic spray Ethanol n-Butanol Spray mode Spray cone angle
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Calculation Method and Simulation for Workspace of Arm-Rail Coordinated Spray Painting Robot 认领 引用
2
作者 Kai Li Guolei Wang +2 位作者 Dunmin Lu Yanbin Yao Zhiyong Li 《Computers, Materials & Continua》 SCIE EI 2026年第6期1596-1612,共17页
To address the need for improving the efficiency of spray painting large and complex curved surfaces,this study investigates the arm-rail coordinated spray painting operation method and proposes a robot workspace calc... To address the need for improving the efficiency of spray painting large and complex curved surfaces,this study investigates the arm-rail coordinated spray painting operation method and proposes a robot workspace calculation method for efficient spray area partitioning.The steps for calculating the workspace under the constraints of the principal normal vector and the conical pose domain are introduced,along with an analysis of the robot’s forward and inverse kinematics.Simulation validation was conducted using a wind turbine blade as the target object.The results show that the workspace based on conical pose domain constraints outperforms both the reachable workspace and the full-orientation workspace in terms of validity and coverage,significantly enhancing spray painting efficiency.Compared to traditional fixed-station spray painting systems,the arm-rail coordinated robot can expand the workspace,reduce the number of stations and spray overlap areas,thereby improving efficiency while ensuring coating uniformity. 展开更多
关键词 Arm-rail coordinated spray painting robot workspace spraying region partitioning seed space conical pose domain
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Direct numerical simulations of high-pressure impinging-jet atomization:Interfacial evolutions and spray characteristics 认领 引用
3
作者 Bo WANG Erjun WU +4 位作者 Anlong YANG Feng ZHANG Baoe YANG Qingquan LIU Xiaodong CHEN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第3期158-174,共17页
This study presents a numerical investigation of impinging-jet atomization across various Weber numbers(We) under high backpressure conditions.Using the volume-of-fluid method,adaptive mesh refinement,and the iso Adve... This study presents a numerical investigation of impinging-jet atomization across various Weber numbers(We) under high backpressure conditions.Using the volume-of-fluid method,adaptive mesh refinement,and the iso Advector interface reconstruction technique,atomization characteristics are simulated and analyzed for different values of We.The results indicate that the geometry induces turbulent jets,which drive turbulent atomization through the shear interactions at the gas–liquid interface.The key observed phenomena include the interaction of impact waves with liquid sheet perforation and the breakup of web of ligaments,both of which are prominent under high backpressure conditions.A novel method,based on the threshold velocity of spray droplet groups,is employed to quantitatively measure the spreading angle,showing that the angle increases with We in both front and side views.Additionally,the Sauter mean diameter of droplets follows power-law scaling with exponents of-1/3 in the upstream region and-1/2 in the downstream region,while the droplet size distribution conforms to a log-normal profile.This research provides valuable insights into interface evolution and droplet characteristics during impingingjet atomization under high backpressure,offering essential guidance for optimizing industrial atomization processes. 展开更多
关键词 Direct numerical simulations High-pressure Impinging-jet atomization Interfacial evolutions Spray characteristics
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Fitting equations for the sorption isotherms of cement mortar with salt spray deposition 认领 引用
4
作者 Bing Li Roberto Giordano +3 位作者 Jean-Marc Tulliani Saierjiang Halike Wanjiang Wang Qinglin Meng 《Frontiers of Architectural Research》 EI CSCD 2026年第3期845-857,共13页
The sorption isotherm of porous building materials serves as a critical hygrothermal property that regulates coupled heat and moisture transfer and influences the energy effi-ciency of building envelopes.Coastal build... The sorption isotherm of porous building materials serves as a critical hygrothermal property that regulates coupled heat and moisture transfer and influences the energy effi-ciency of building envelopes.Coastal buildings endure chronic salt spray exposure,yet clas-sical fitting equations neglect salt deposition effects.This study investigates cement mortar specimens subjected to accelerated salt spray tests(0—35 cycles).The salt content of the specimens was quantified via chloride ion analysis,and isothermal sorption tests were con-ducted under 33%—93%relative humidity(RH)using a static equilibrium method.A modified model integrating a salt influence factor(ηu)into classical equations was developed.Addition-ally,dual-regime sorption isotherm models were formulated based on deliquescence mecha-nisms of salt crystals above critical humidity,governed by the Robinson equation and Nielsen model,respectively.This framework enables accurate prediction of equilibrium mois-ture content under varying coupled humidity-salt conditions,significantly enhancing the reli-ability of hygrothermal simulations for coastal buildings in salt spray climates. 展开更多
关键词 Salt spray climate Cement mortar Sorption isotherm Fitting equations
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Efficient control and removal of laser‑generated aerosol particles by combining water spray with pre‑injection of electrical charged mist for nuclear reactor decommissioning 认领 引用
5
作者 Ruicong Xu Avadhesh Kumar Sharma +6 位作者 Zeeshan Ahmed Ravinder Kumar Laffolley Hugo Ryo Yokoyama Shuichiro Miwa Shunichi Suzuki Atsushi Kosuge 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第1期244-262,共19页
Laser-induced aerosols,predominantly submicron in size,pose significant environmental and health risks during the decommissioning of nuclear reactors.This study experimentally investigated the removal of laser-generat... Laser-induced aerosols,predominantly submicron in size,pose significant environmental and health risks during the decommissioning of nuclear reactors.This study experimentally investigated the removal of laser-generated aerosol particles using a water spray system integrated with an innovative system for pre-injecting electrically charged mist in our facility.To simulate aerosol generation in reactor decommissioning,a high-power laser was used to irradiate various materials(including stainless steel,carbon steel,and concrete),generating aerosol particles that were agglomerated with injected water mist and subsequently scavenged by water spray.Experimental results demonstrate enhanced aerosol removal via aerosol-mist agglomeration,with charged mist significantly improving particle capture by increasing wettability and size.The average improvements for the stainless steel,carbon steel,and concrete were 40%,44%,and 21%,respectively.The results of experiments using charged mist with different polarities(both positive and negative)and different surface coatings reveal that the dominant polarity of aerosols varies with the irradiated materials,influenced by their crystal structure and electron emission properties.Notably,surface coatings such as ZrO2and CeO2were found to possibly alter aerosol charging characteristics,thereby affecting aerosol removal efficiency with charged mist configurations.The innovative aerosol-mist agglomeration approach shows promise in mitigating radiation exposure,ensuring environmental safety,and reducing contaminated water during reactor dismantling.This study contributes critical knowledge for the development of advanced aerosol management strategies for nuclear reactor decommissioning.The understanding obtained in this work is also expected to be useful for various environmental and chemical engineering applications such as gas decontamination,air purification,and pollution control. 展开更多
关键词 Laser-induced aerosol generation Aerosol removal Electrically charging mist Agglomeration Water spray scavenging Reactor decommissioning
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Size and light scattering enhancement of sea spray aerosol via condensing fatty acid vapor 认领 引用
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作者 Minglan Xu Narcisse Tsona Tchinda +1 位作者 Siyang Li Lin Du 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第7期693-702,共10页
Once sea spray aerosol(SSA)particles are emitted into the atmosphere,they tend to interact with organic compounds and form a certain amount of organic coating on their surfaces.Here,laboratory measurements were perfor... Once sea spray aerosol(SSA)particles are emitted into the atmosphere,they tend to interact with organic compounds and form a certain amount of organic coating on their surfaces.Here,laboratory measurements were performed to investigate property changes between uncoated and coated SSA particles to assess the effect of organic coating on the surface chemistry and optical properties of nascent SSA.Stearic acid,oleic acid and mixed fatty acid were used as a proxy for coating materials and applied to aerosols produced by SSA generator.We found that the geometric mean diameter of SSA particles increased with increasing concentration of the fatty acid vapor due to higher heating temperatures,suggesting the formation of thicker coatings.Characterization by Fourier transform infrared spectroscopy and transmission electron microscope demonstrated that the SSA surface was coated with an organic coating of fatty acids,which gave the SSA a core–shell morphology.Furthermore,optical measurements by photo-acoustic extinctiometer at 375 nm revealed significantly enhanced light scattering efficiency and complex refractive index from fatty acid-coated SSA particles.The current results suggest that the fatty acid coating changes the diameter and surface composition of SSA particles,which may further impact their optical properties.It is therefore necessary to accurately characterize the overall properties of SSA particles carrying organic coatings due to condensing fatty acid vapor to reveal their overall impact on climate. 展开更多
关键词 Sea spray aerosol Organic coating Fatty acid Light scattering Complex refractive index
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Analyzing combustion performance of LOX/GCH4 pintle injector according to spray characteristics 认领 引用
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作者 Ziguang LI Peng CHENG +2 位作者 Qinglian LI Xiao BAI Jingfeng PENG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第1期120-131,共12页
This study aims to reveal the influence of Local Momentum Ratio(LMR)on the combustion efficiency of an LOX/GCH4 pintle injector from the perspective of spray characteristics.Hot fire tests were conducted to establish ... This study aims to reveal the influence of Local Momentum Ratio(LMR)on the combustion efficiency of an LOX/GCH4 pintle injector from the perspective of spray characteristics.Hot fire tests were conducted to establish the relationship between combustion efficiency and LMR.The spray characteristics for different LMRs were simulated by the validated volume of fluid-to-discrete phase model method,taking into account the combustion chamber wall confinement.Subsequently,the difference in combustion efficiency was analyzed by comparing the spray simulation results of backpressure conditions similar to hot fire tests.The results indicate that combustion efficiency increased initially(LMR=1.12-1.64)and then decreased(LMR>1.64).Quantitative analysis revealed a linear correlation(R2=0.95)between LMR and combustion efficiency within 1.12<LMR<1.64.As the LMR increased,the improvement in combustion efficiency was attributed to a wider spray distribution range and smaller droplet sizes.The area of the mantle recirculation zone that is detrimental to combustion decreased by approximately 38%,and the droplet size reduced from 37 to 16μm.This effectively enhanced both the mixing of the propellant and the evaporation process.When the LMR exceeded the critical value(1.64 in this study),the impingement of liquid oxygen on the combustion chamber wall was confirmed via overheating discoloration marks on the inner surface of combustion chamber's cylindrical section.The impingement of liquid oxygen on the combustion chamber wall increased the transport of liquid oxygen to the wall,directly reducing the mixing quality and combustion efficiency.The outcomes of this study provide the practical guidance for design and improvement in combustion efficiency of the pintle injector thrust chamber. 展开更多
关键词 Combustion efficiency Gas-liquid pintle injector Local momentum ratio LOX/GCH4 Spray characteristics
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Effects of injection conditions on the first impact of milk droplets onto the chamber surfaces in the spray drying process 认领 引用
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作者 Ali M.Sefidan Mathieu Sellier James N.Hewett 《Particuology》 SCIE EI CAS CSCD 2026年第7期36-47,共12页
Through spray drying,a liquid containing solid particles is converted into dry powder by evaporating the solvent.Many industries,such as the dairy industry,use this method to make dry powder as it extends the shelf li... Through spray drying,a liquid containing solid particles is converted into dry powder by evaporating the solvent.Many industries,such as the dairy industry,use this method to make dry powder as it extends the shelf life of the product and makes it more dense for transport.Milk powder production in dairy plants is highly challenging because partially wet milk droplets can deposit on the surfaces of drying chambers.Through the use of a numerical model,this study examines the effects of injection parameters on droplet conditions at the point of impact with the chamber surfaces during the spray drying process of skim milk.The process was numerically modelled using a four-stage droplet evaporation model coupled with an Euler-Lagrange simulation that describes the trajectory of the milk droplets inside the dryer.According to the results,a greater proportion of smaller droplets impact the wall at smaller angles,with lower velocity magnitudes,and contain less moisture than larger droplets.As a result of a larger injection angle,more droplets hit the chamber surfaces with smaller impact angles,resulting in lower moisture content and lower temperatures at impact.A higher injection velocity resulted in a greater proportion of droplets impacting the surface of the chamber with lower temperatures and a greater moisture content. 展开更多
关键词 Spray drying Euler-Lagrange model Droplet drying model Droplet impact
Fabrication of composite microspheres doped with nano-aluminum powder using melt spray technology 认领 引用
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作者 Yilin Liu Lanqi Zhang +7 位作者 Yulong Yin Nan Li Xiangnan Chu Qi Ma Jing Liu Wenbo Yang Yingdi Lv Shengyang Tao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第2期283-292,共10页
Melt spray technology serves as an effective method for fabricating spherical micro-nano composite materials,with established applications in catalysts and pharmaceuticals.This study extends its application to energet... Melt spray technology serves as an effective method for fabricating spherical micro-nano composite materials,with established applications in catalysts and pharmaceuticals.This study extends its application to energetic composite microspheres,investigating the microsphere formation process using nano-aluminum powder(nano-Al)combined with the inert surrogate sucrose octaacetate(SOA).This study systematically investigates the effects of process parameters,formulation composition,and storage conditions on the particle size,morphology,and stability of SOA/Al composite microspheres.Higher atomizing gas pressure and temperature significantly reduced median particle diameter(D50),yielding a D50 of 35.09μm at 150℃ and 200 kPa.The addition of polyethylene glycol:polyvinylpyrrolidone(1:1)enhanced microsphere circularity from 0.67 to 0.85.This system produced 78 g composite microspheres within 20 min,demonstrating efficientlab-scale production.X-ray diffraction and differential scanning calorimetry results indicated that rapid cooling led to amorphous structures,which were stabilized during storage at 4℃.The scalable melt spray fabrication strategy developed here for nanoparticle-doped composite microspheres provides a basis for future studies involving diverse functional composites. 展开更多
关键词 Melt spray Micro-nano composite material Amorphous structure Composite microspheres
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Coupling of a High-Temperature Ion Trap Reactor with an Electron-Spray-Ionization Source for Reactions of Mass-Selected Organometallic Ions 认领 引用
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作者 An Zhao Qing-Yu Liu +2 位作者 Zhong-Pu Zhao Zi-Yu Li Sheng-Gui He 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2026年第1期29-40,I0016-I0020,I0042,共12页
Organometallics play a vital role in catalytic and synthetic processes.Understanding the indi-vidual elementary steps of the reactions of organo metallic com-pounds is crucial for the development and ratio-nal design ... Organometallics play a vital role in catalytic and synthetic processes.Understanding the indi-vidual elementary steps of the reactions of organo metallic com-pounds is crucial for the development and ratio-nal design of new organometallic reagents and catalysts.Study of gas-phase reactions is one of the key approaches to probing the individual elementary steps under isolated and re-producible conditions.A series of investigations have been reported on the gas-phase reac-tions between organometallic ions and neutral molecules under room temperature conditions.However,studies about the reactions between organometallic ions and neutral molecules un-der heating conditions are very limited.In this work,an apparatus with an electrospray ion-ization source and an ion funnel trap,which can be coupled with a high-temperature linear ion trap reactor,was designed and built.The apparatus can be used to investigate the reac-tions between organometallic ions and neutral molecules under heating conditions.By using the apparatus,the adsorption reactions of Rh(PPh3)2++CO→Rh(PPh3)2CO+and CuPPh3++CO2→CuPPh3CO2+under variable temperature conditions have been conducted.The experiments showed that the reaction rate constant of Rh(PPh3)2++CO increases first and then decreases with increasing temperature.In contrast,the rate constant of CuPPh3++CO2decreases monotonically as the temperature increases.Density functional theory calculations indicate that the adsorption reaction of Rh(PPh3)2++CO→Rh(PPh3)2CO+is subject to a small barrier,while CuPPh3++CO2→CuPPh3CO2+is barri-erless,which is consistent with the experimentally observed temperature-dependent rate con-stants.The newly built apparatus can thus provide new kinetic information to address reac-tion mechanisms for organometallic ions. 展开更多
关键词 Electron spray ionization Organometallic ions Gas-phase ion-molecule reaction
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Development of a microcontroller-based embedded system for position control of spray delivery pipe of tractor-operated air ballast sprayer 认领 引用
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作者 Arjun Chouriya Rohit Singh Edathiparambil V.Thomas 《Technology in Agronomy》 2025年第1期79-84,共6页
A traditional air blast sprayer typically relies on an additional operator to manage the positioning of the spray delivery pipe.To eliminate the need for a second operator,a microcontroller-based embedded system was d... A traditional air blast sprayer typically relies on an additional operator to manage the positioning of the spray delivery pipe.To eliminate the need for a second operator,a microcontroller-based embedded system was developed and tested under laboratory conditions using a specialized setup.This system consisted of several components:a spray delivery pipe controller to regulate and rotate the spray delivery pipe based on signals received from the microcontroller,a signal generator to create signals by adjusting the lever via potentiometer R1 to specify the desired position of the spray delivery pipe,a mechanical position indicator to display the required or set location of the pipe and a microcontroller-based embedded system to process the signals generated by the signal generator and compare them with the current location signal.The embedded system then outputs a signal,which,when received by the motor,determines the angle and direction of rotation for the spray delivery pipe.This rotation is facilitated by the motor's command to rotate the ring gear through the rotation of the pinion gear,ultimately controlling the movement of the spray delivery pipe.The evaluation findings indicated that the developed system requires 36.48 s to execute a full rotation of the spray delivery pipe,with an angle error ranging from 0 to 2 degrees.Overall,the developed embedded system holds the potential to eliminate the need for a second operator,offering convenient management and control of the spray delivery pipe. 展开更多
关键词 create signals embedded system spray delivery pipe signal generator microcontroller based system position control air blast sprayer regulate rotate spray delivery pipe
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Progress in study of spray pyrolysis technology for chloride salt solutions in rare earth extraction and separation processes 认领 引用 被引量：2
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作者 Ziyi Cheng Xiaowei Huang +5 位作者 Zongyu Feng Jianping Long Hai Yu Meng Wang Juanyu Yang Haiqing Hao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第10期2053-2064,I0001,共12页
This paper focuses on the preparation of rare earth oxide products from rare earth chloride solutions during the rare earth extraction and separation processes,as well as the recycling of magnesium chloride solutions.... This paper focuses on the preparation of rare earth oxide products from rare earth chloride solutions during the rare earth extraction and separation processes,as well as the recycling of magnesium chloride solutions.It proposes the idea of introducing spray pyrolysis technology into the rare earth extraction and separation processes.This paper briefly describes the development history of chloride spray pyrolysis technology,focusing on the research status and application progress of rare earth chloride solution and magnesium chloride solution spray pyrolysis technology,as well as spray pyrolysis equipment.The paper also analyzes the challenges and technical intricacies associated with applying spray pyrolysis technology to chloride solutions in the rare earth extraction and separation processes.Additionally,it explores future trends and proposes strategies to facilitate the full recycling of acids and bases,streamline the process flow,and enhance the prospects for green and low-carbon rare earth metallurgy. 展开更多
关键词 Rare earths Separation processes Spray pyrolysis technology Chloride salt solutions Green recycling
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High ductility induced by twin-assisted grain rotation and merging in solid-state cold spray additive manufactured Cu 认领 引用 被引量：2
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作者 Wenya Li Jingwen Yang +2 位作者 Zhengmao Zhang Yingchun Xie Chunjie Huang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第11期11-15,共5页
1.Introduction.Cold Spray(CS)is a highly advanced solid-state metal depo-sition process that was first developed in the 1980s.This innovative technique involves the high-speed(300-1200 m/s)impact deposition of micron-... 1.Introduction.Cold Spray(CS)is a highly advanced solid-state metal depo-sition process that was first developed in the 1980s.This innovative technique involves the high-speed(300-1200 m/s)impact deposition of micron-sized particles(5-50μm)to fabricate coatings[1-3].CS has been extensively used in a variety of coating applications,such as aerospace,automotive,energy,medical,marine,and others,to provide protection against high temperatures,corrosion,erosion,oxidation,and chemicals[4,5].Nowadays,the technical interest in CS is twofold:(i)as a repair process for damaged components,and(ii)as a solid-state additive manufacturing process.Compared to other fusion-based additive manufacturing(AM)technologies,Cold Spray Additive Manufacturing(CSAM)is a new member of the AM family that can enable the fabrication of deposits without undergoing melting.The chemical composition has been largely preserved from the powder to the deposit due to the minimal oxidation.The significant advantages of CSAM over other additive manufacturing processes include a high production rate,unlimited deposition size,high flexibility,and suitability for repairing damaged parts. 展开更多
关键词 additive manufacturing ductility cold spray merging solid state deposition twin assisted grain rotation
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Flow control mechanism of sprays using dual synthetic jets 认领 引用 被引量：1
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作者 Wei HE Songjiang FENG +4 位作者 Zhenbing LUO Lurui XIA Xiong DENG Sen LI Sheng XU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第3期1-17,共17页
Dual Synthetic Jets (DSJ) can directly affect the development of spray through the complex vortex structure. The mechanism of flow control on spray and its thermal management application are studied by combining exper... Dual Synthetic Jets (DSJ) can directly affect the development of spray through the complex vortex structure. The mechanism of flow control on spray and its thermal management application are studied by combining experiment and simulation. The spray characteristics under different injection angles are studied, and the results show that the angle should be controlled in the range of 45°–60°, so that sufficient momentum transfer can be obtained, and meanwhile spray impingement area narrowing can be avoided. The spray characteristics under flow control of DSJ with different Reynolds numbers are studied, and the results show that Reynolds number should be controlled in the range of 2859–3574, so that strong particle streamwise acceleration and wall film disturbing can be achieved. In addition, the DSJ kinetic energy is utilized more efficiently. On the basis of previous research, this paper proposes a novel active heat pipe based on spray controlled by DSJ. The space occupancy has been reduced by more than 60%. Even in a sealed state, the active heat pipe is able to cool a hot surface with heat flux of 22.2 kW/m2 from 111℃ to 57℃ only in 20 s. The noise of DSJ is reduced from 85 dB to 60 dB, which is expected to promote the practical application of DSJ in thermal management. 展开更多
关键词 Dual synthetic jets Fow cantrol Spray cooling Heat pipe Piezoelectric atomizer Heat transfer enhancerment
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Corrosion behavior and performance degradation of aluminum-copper cable joints with magnetic pulse crimping in salt spray environment 认领 引用 被引量：1
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作者 Yuan-heng YAO Shao-luo WANG +4 位作者 Hao JIANG Jun-jia CUI Guang-yao LI Kai-dong LUO Ling-hua XIA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2025年第6期1937-1955,共19页
The corrosion resistance of aluminum(Al)cable-copper(Cu)terminal joints fabricated by magnetic pulse crimping(MPC)and hydraulic clamp crimping(HCC)was compared.Performance degradation was evaluated by mechanical and e... The corrosion resistance of aluminum(Al)cable-copper(Cu)terminal joints fabricated by magnetic pulse crimping(MPC)and hydraulic clamp crimping(HCC)was compared.Performance degradation was evaluated by mechanical and electrical properties.Additionally,corrosion behavior was analyzed by electrochemical testing.Microscopic characterization was performed by scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS).Results show that the tensile strength of the corroded joints is reduced.However,due to the advantages of high-speed forming and contact tightness unique to MPC,the contact resistance of the corroded joints still maintains excellent.Electrochemical tests demonstrate that the MPC joints have higher corrosion potentials and smaller corrosion currents,providing better corrosion resistance.The formation of a primary battery between Al and Cu at the lap joint leads to the formation of severer corrosion pits. 展开更多
关键词 magnetic pulse crimping aluminum−copper cable joint salt spray corrosion performance degradation corrosion mechanism
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Multi-scale analysis of microstructural evolution and atomic bonding mechanisms in CoCrFeMnNi high-entropy alloys upon cold spray impact 认领 引用 被引量：2
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作者 R.Nikbakht M.Saadati +2 位作者 H.S.Kim M.Jahazi R.R.Chromik 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第5期263-277,共15页
Large interfacial strains in particles are crucial for promoting bonding in cold spraying(CS),initiated either by adiabatic shear instability(ASI)due to softening prevailing over strain hardening or by hydrostatic pla... Large interfacial strains in particles are crucial for promoting bonding in cold spraying(CS),initiated either by adiabatic shear instability(ASI)due to softening prevailing over strain hardening or by hydrostatic plasticity,which is claimed to promote bonding even without ASI.A thorough microstructural analysis is vital to fully understand the bonding mechanisms at play during microparticle impacts and throughout the CS process.In this study,the HEA CoCrFeMnNi,known for its relatively high strain hardening and resistance to softening,was selected to investigate the microstructure characteristics and bonding mech-anisms in CS.This study used characterization techniques covering a range of length scales,including electron channeling contrast imaging(ECCI),electron backscatter diffraction(EBSD),and high-resolution transmission microscopy(HR-TEM),to explore the microstructure characteristics of bonding and overall structure development of CoCrFeMnNi microparticles after impact in CS.HR-TEM lamellae were prepared using focused ion beam milling.Additionally,the effects of deformation field variables on microstructure development were determined through finite element modeling(FEM)of microparticle impacts.The ECCI,EBSD,and HR-TEM analyses revealed an interplay between dislocation-driven processes and twinning,leading to the development of four distinct deformation microstructures.Significant grain refinement occurs at the interface through continuous dynamic recrystallization(CDRX)due to high strain and temperature rise from adiabatic deformation,signs of softening,and ASI.Near the interface,a necklace-like structure of refined grains forms around grain boundaries,along with elongated grains,resulting from the coexistence of dynamic recovery and discontinuous dynamic recrystallization(DDRX)due to lower temperature rise and strain.Towards the particle or substrate interior,concurrent twinning and dislocation-mediated mechanisms refine the structure,forming straight,curved,and intersected twins.At the top of the particles,only deformed grains with a low dislocation density are observed.Our results showed that DRX induces microstructure softening in highly strained interface areas,facilitating atomic bonding in CoCrFeMnNi.HR-TEM investigation confirms the formation of atomic bonds between particles and substrate,with a gradual change in crystal lattice orientation from the particle to the substrate and the occurrence of some misfit dislocations and vacancies at the interface.Finally,the findings of this research suggest that softening and ASI,even in materials resistant to softening,are required to establish bonding in CS. 展开更多
关键词 Multi-length scale microstructure characteristics of bonding in cold spray DRX-induced softening and its role in bonding Interplay between twinning-induced hardening and DRX-driven softening EBSD&HR-TEM CoCrFeMnNi high entropy alloys
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Optimization of heat shock,acid shock and salt stress process and its mechanism of protection before spray drying of Baijiu yeast-Modified sporidiobolus Johnsonii A 认领 引用
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作者 Fengkui Xiong Zhongbin Liu +3 位作者 Jingyu Li Guangzhong Hu Duqing Qu Bo Huang 《Bioresources and Bioprocessing》 SCIE EI CSCD 2025年第1期2097-2108,共12页
The low survival rate of high-quality baijiu yeast,Modified Sporidiobolus Johnsonii A(MSJA),during spray drying and the unclear mechanisms underlying its stress treatment processes(heat shock,acid shock,and salt stres... The low survival rate of high-quality baijiu yeast,Modified Sporidiobolus Johnsonii A(MSJA),during spray drying and the unclear mechanisms underlying its stress treatment processes(heat shock,acid shock,and salt stress)have significantly hindered its low cost and high effective application,thereby impacting the high-quality development of the liquor industry.To address this problem.A response surface experiment was first conducted to optimize the stress treatment process prior to spray drying.Subsequently,the mechanisms and efficacy of the stress treatments were analyzed using Field Emission Scanning Electron Microscopy(FESEM).The results demonstrated that the survival rate of spray-dried MSJA could be improved from 38.5 to 54.8%under the optimal conditions,with heat shock temperature(X)=35.2℃,acid stress pH(Y)=3.2,and salt stress concentration(Z)=4 g/L KH2PO4.The protective effects of the stress treatments on MSJA during spray drying were ranked as follows:comprehensive treatment>heat shock>acid stress>salt stress.Acid stress and heat shock protect MSJA by reducing cell shrinkage,collapse,and volume loss,while salt stress aids in maintaining osmotic pressure balance across MSJA cell membranes during drying.This study not only optimized the stress treatment scheme of MSJA before spray drying,but also laid a foundation for both high efficiency and high quality spray drying MSJA.It also revealed the mechanism of each stress treatment,and provided guidance for the protection of other microorganisms by spray drying stress treatment. 展开更多
关键词 Spray drying Modified sporidiobolus johnsonii A Acid shock Heat shock Salt stress Protection mechanism
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Evaluating the bond strength and fracture mechanisms of cold-sprayed zinc coating on AZ91 magnesium substrate via a combined experimental and computational approach 认领 引用
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作者 Tanvi Ajantiwalay Lei Li +5 位作者 James V.Haag IV Sridhar Niverty Rajib Kalsar Arun Devaraj Ayoub Soulami Vineet V.Joshi 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第10期4877-4890,共14页
Magnesium(Mg)alloys are ideal candidates for automotive applications due to their high strength to weight ratio,castability,recyclability etc.,however,they lack corrosion and oxidation resistance.Solid-state depositio... Magnesium(Mg)alloys are ideal candidates for automotive applications due to their high strength to weight ratio,castability,recyclability etc.,however,they lack corrosion and oxidation resistance.Solid-state deposition techniques,such as cold spray,have been demonstrated to enhance their corrosion resistance as it relies on the severe plastic deformation of powder particles upon impact with the substrate to form a metallurgical bond with the substrate and within the coating.At cold sprayed interfaces,a heterogeneous microstructure is formed that includes some porosity,oxides and intermetallics which can significantly affect coating performance.Thus,establishing a direct correlation between the interface microstructure and its properties can aid in designing optimal cold spray parameters.In this study,we investigated the microstructure and mechanical properties of a zinc(Zn)coating deposited on a high pressure die cast(HPDC)AZ91 Mg substrate via high resolution scanning transmission electron microscopy,in situ micro-tensile testing,and finite element method(FEM)modeling.Micro-tensile pillars fabricated using the plasma focused ion beam(PFIB)successfully isolates the coating-substrate interface within the gauge length.The average bond strength of Zn-Mg interface was determined to be∼140 MPa with failure occurring partially at the interface and mostly into the coatings.A detailed microstructural characterization revealed evidence of a strong metallurgical bonding at the Zn-Mg interface and formation of the C14 MgZn2laves phase interlayer resulting in a mixed mode of fracture during the micro-tensile experiments.FEM modeling reveals the stress distribution along the interfaces and suggests that a MgZn2layer thickness between 200–400 nm is optimum to increase the bond strength and minimize the triaxiality.Such a site-specific interfacial analysis with correlative computational modeling provides crucial insight into the overall performance of cold spray interfaces. 展开更多
关键词 Cold spray Micro-tensile testing Bond strength SEM,TEM FEM modeling
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Influence of Aviation Kerosene-Diesel Blending Ratios on Ignition Behavior and Spray Dynamics 认领 引用
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作者 Hailong Chen Guanzhen Tao +1 位作者 Daijun Wei Guangyao Ouyang 《Fluid Dynamics & Materials Processing》 EI 2025年第10期2527-2538,共12页
Modifications in fuel spray characteristics fundamentally influence fuel–air mixing dynamics in diesel engines,thereby significantly affecting combustion performance and emission profiles.This study explores the oper... Modifications in fuel spray characteristics fundamentally influence fuel–air mixing dynamics in diesel engines,thereby significantly affecting combustion performance and emission profiles.This study explores the operational behavior of RP-5 aviation kerosene/diesel blended fuels in marine diesel engines.A spray visualization platform based on Mie scattering technology was developed to comparatively analyze the spray characteristics,ignition behavior,and soot emissions of RP-5 aviation kerosene,conventional-35#diesel,and their blends at varying mixing ratios(D100H0,D90H10,D70H30,D50H50,D30H70,D0H100).The findings demonstrate that,under constant injection pressure,aviation kerosene combustion results in a more uniform temperature field,characterized by lower core flame temperatures,broader high-temperature regions,and reduced soot concentrations with spatially homogeneous distribution and no pronounced peaks.In terms of spray dynamics,increasing the proportion of aviation kerosene leads to a marked widening of the spray cone angle.Meanwhile,spray penetration length exhibits a non-monotonic trend—initially decreasing and subsequently increasing—as the kerosene blending ratio rises. 展开更多
关键词 Diesel/Aviation kerosene ignition soot spray
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Physicochemical Properties of Instant Honeysuckle Berry Powder Under Low-temperature Spray Drying 认领 引用
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作者 Zheng Xianzhe Chen Qiming +3 位作者 Liu Chenghai Zhang Yuhan Zhu Haihui Xu Di 《Journal of Northeast Agricultural University(English Edition)》 CAS 2025年第4期83-96,共14页
The low-temperature spray drying technology was developed to process instant berry powder with high efficiency and higher anthocyanin retention.The maltodextrin,whey protein and inulin were selected as additives for i... The low-temperature spray drying technology was developed to process instant berry powder with high efficiency and higher anthocyanin retention.The maltodextrin,whey protein and inulin were selected as additives for instant properties formation in berry powder.The effects of inlet air temperature(40℃–80℃),vacuum degree(0.02–0.06 MPa)and additive amount on the physicochemical properties of berry powder were analyzed through solubility,anthocyanin retention and powder yield,based on moisture content and microstructure.The findings indicated that adding maltodextrin to berry enhanced the powder yield and instant solubility.Whey protein,as an additive,provided effective protection for the anthocyanins of berry powder,and the addition less than 10 g·100-1 g improved the powder yield.Inulin,as an additive,reduced moisture content of berry powder,which was conducive to the higher anthocyanin retention and solubility.Technique for order preference by similarity to ideal solution(TOPSIS)analysis was conducted to optimize the spray drying parameters for anthocyanin protection and solubility.The addition of 100%maltodextrin enhanced anthocyanin protection and solubility,while maintaining the desired moisture content and powder yield.This approach was used to evaluate the comprehensive quality of berry powder.This research can provide technical guidance for producing berry powder under low-temperature spray drying. 展开更多
关键词 low-temperature spray drying berry instant solution anthocyanin microstructure
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