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Friction 2024年第2期12卷 271-290页

作者： Shaohua LI Xiaohui LIN Shuyun JIANG School of Mechanical Engineering Southeast UniversityNanjing 211189China

Bubbly oil lubrication is a type of lubrication ***,the lubrication model of the bubbly oil has not been thoroughly *** paper aims to investigate the modelling for bubbly oil lubrication considering the interfacial effect and thermal effect,and a theoretical model is established based on the theory of multiphase *** interfacial and thermal effects on the static characteristics of a thrust bearing are analyzed.A test rig for the thrust bearing is developed to measure the static characteristics of the bearing under bubbly oil *** results show that the bearing static characteristics,*** temperature rise,film thickness,friction torque,and volume flow,increase with consideration of three interfacial effects;the bearing temperature rise increases but the film thickness,friction torque,and volume flow rate decrease with consideration of the three thermal effects;the thermal effect on the bearing static characteristics is greater than the interfacial effect.

关键词： bubbly oil lubrication theory of multiphase mixtures interfacial effect thermal effect fluid bearing

interfacial effect on the reverse of magnetization and ultrafast demagnetization in Co/Ni bilayers with perpendicular magnetic anisotropy

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Chinese Physics B 2018年第5期27卷 469-473页

作者：弓子召张伟何为张向群刘永成昭华 State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan University State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences

For static magnetic properties of the Co/Ni bilayers, macroscopic hysteresis loops and microscopic magnetic moment distributions have been determined by the object oriented micromagnetic framework（OOMMF）. It is found that when the bilayer systems are fully decoupled, the magnetizations of the two phases reverse separately. The coercivity of the bilayers decreases to a valley value sharply with increasing interfacial exchange coupling and then rises slowly to a platform. On the other hand, we have carried out an atomistic simulation for the laser-induced ultrafast demagnetization of the Co/Ni bilayer. A larger damping constant leads to a faster demagnetization as well as a larger degree of demagnetization, which is consistent with the first-principle theoretical results. For the magnetization recovery process, the damping constant has different influences on the recovery time with various peak electron temperatures, which is ignored in previous atomistic simulations as well as the Landau–Liftshit–Bloch（LLB） micromagnetic calculations. Furthermore, as the interfacial exchange coupling increases, the ultrafast demagnetization curves for Co and Ni become coincident, which is a demonstration for the transition from two-phase phenomenon to single-phase phenomenon.

关键词： micromagnetic simulation interfacial effect hysteresis loops ultrafast demagnetization

interfacial　efects　of　suspended　particles　on　biodegradation　of　N-(2,4-dimethyl　phenyl)-N’-methylformamidine　hydrochloride　and　dibutyl　phthalate　in　waters

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Journal of Environmental Sciences 1997年第2期9卷 101-106页

作者： Ye Changming, Wang Hong, Lei Zhifang Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

The occurrence of suspended particles and the organic chemicals biodegradation are the universal phenomenan in aquatic environment, therefore research of interfacial effects of suspended particles on biodegradation of organic compounds has became very important aspect of organic pollutants fate studies in multimedia environment. The biodegradation of N (2,4 dimethyl phenyl) N' methylformamidine hydrochloride and dibutyl phthalate, and the interfacial effects of suspended particles on biodegradation rate were studied. The interfacial effect factor was introduced to express the effect of suspended solids on biodegradation rate. The results of simulation experiment of two compounds and theoretical analysis of process show that biodegradation rate of pollutants increases linearly with interfacial effect factor.

关键词： interfacial effect suspended particles organic chemicals waters.

Thermodynamic analysis and modification of Gibbs–Thomson equation for melting point depression of metal nanoparticles

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Chinese Journal of Chemical Engineering 2021年第3期34卷 198-205页

作者： Nanhua Wu Xiaohua Lu Rong An Xiaoyan Ji Division of Energy Science/Energy Engineering LuleåUniversity of Technology97187 LuleåSweden State Key Laboratory of Materials-Oriented and Chemical Engineering Nanjing Tech UniversityNanjing 211816China Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Herbert Gleiter Institute of Nanoscience Nanjing University of Science&TechnologyNanjing 210094China

Abnormal melting point depression of metal nanoparticles often occurs in heterogeneous catalytic reactions,which leads to a reduction in the stability of reactive *** study this abnormal phenomenon,the original and surface-energy modified Gibbs-Thomson equations were analyzed in this work and further modified by considering the effect of the *** results revealed that the original Gibbs-Thomson equation was not suitable for the particles with radii smaller than 10 ***,the performance of the surface-energy modified Gibbs-Thomson equation was improved,and the deviation was reduced to(-350-100)K,although further modification of the equation by considering the interfacial effect was necessary for the small particles(rinterfacial effect improved the model performance with a deviation of approximately-50 to 20 K,where the interfacial effect can be predicted quantitatively from the thermodynamic properties of the metal and ***,the micro-wetting parameterα_W can be used to qualitatively study the overall impact of the substrate on the melting point depression.

关键词： Melting point depression Metal nanoparticle Gibbs–Thomson equation Substrate interfacial effect

Synergistic catalysis of cluster and atomic copper induced by copper-silica interface in transfer-hydrogenation

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Nano Research 2021年第12期14卷 4601-4609页

作者： Ruoyu Fan Yange Zhang Zhi Hu Chun Chen Tongfei Shi Lirong Zheng Haimin Zhang Junfa Zhu Huijun Zhao Guozhong Wang Key Laboratory of Materials Physics Centre for Environmental and Energy NanomaterialsKey Laboratory of Materials PhysicsInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefei230026China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei230026China Center for Clean Environment and Energy Gold Coast CampusGriffith UniversityQueensland4222Australia

To data,using strong metal-support interaction(SMSI)effect to improve the catalytic performance of metal catalysts is an important strategy for heterogeneous catalysis,and this effect is basically achieved by using reducible metal ***,the formation of SMSI between metal and inert-support has been so little coverage and remains *** this work,the SMSI effect can be effectively extended to the inert support-metal catalysis system to fabricate a Cu^(0)/Cu-doped SiO_(2) catalyst with high dispersion and loading(38.5 wt.%)through the interfacial effect of inert *** the catalyst,subnanometric composite of Cu cluster and atomic copper(in the configuration of Cu-O-Si)can be consciously formed on the silica interface,and verified by extended X-ray absorption fine structure(EXAFS),in situ X-ray photoelectron spectroscopy(XPS),and high-angle annular dark field-scanning transmission electron microscopy(HAADF-STEM)*** promoting activity in transfer-hydrogenation by the SMSI effect of Cu-silica interface and the synergistic active roles of cluster and atomic Cu have also been revealed from surface interface structure,catalytic activity,and density functional theory(DFT)theoretical calculation at an atomic *** subnanometric composite of cluster and atomic copper species can be derived from a facile synthesis strategy of metal-inert support SMSI effect and the realistic active site of Cu-based catalyst can also been identified accurately,thus it will help to expand the application of subnanometric materials in industrial catalysis.

关键词： strong metal-support interaction(SMSI) copper inert-support synergistic interfacial effect transfer-hydrogenation

In-situ encapsulation ofα-Fe_(2)O_(3) nanoparticles into ZnFe_(2)O_(4) micro-sized capsules as high-performance lithium-ion battery anodes

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Journal of Materials Science & Technology 2021年第16期75卷 110-117页

作者： Wei Wu Yongshan Wei Hongjiang Chen Keyan Wei Zhitong Li Jianhui He Libo Deng Lei Yao Haitao Yang Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advanced Technology of CeramicsGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Transition metal oxides as anode materials for high-performance lithium-ion batteries suffer from severe capacity decay,originating primarily from particle pulverization upon volume expansion/shrinkage and the intrinsically sluggish electron/ion ***,in-situ encapsulation ofα-Fe_(2)O_(3) nanoparticles into micro-sized ZnFe_(2)O_(4) capsules is facilely fulfilled through a co-precipitation process and followed by heat-treatment at optimal calcination *** porous ZnFe_(2)O_(4) scaffold affords a synergistic confinement effect to suppress the grain growth ofα-Fe2 O3 nanocrystals during the calcination process and to accommodate the stress generated by volume expansion during the charge/discharge process,leading to an enhanced interfacial conductivity and inhibit electrode pulverization and mechanical failure in the active *** these merits,the preparedα-Fe_(2)O_(3)/Fe_(2)O_(4) composite delivers prolonged cycling stability and improved rate capability with a higher specific capacity than soleα-Fe_(2)O_(3) and Fe_(2)O_(4).The discharge capacity is retained at 700 mAh g-1 after 500 cycles at 200 mA g^(-1) and 940 mAh g^(-1) after 50 cycles at 100 m A g^(-1).This work provides a new perspective in designing transition metal oxides for advanced lithium-ion batteries with superior electrochemical properties.

关键词： α-Fe_(2)O_(3)/ZnFe_(2)O_(4)ceramic composite Co-precipitation process Confinement effect interfacial effect Grain growth High conductivity Lithium-ion battery anodes

Fatigue Behaviour of Metal Matrix Composites

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Journal of Materials Science & Technology 1992年第4期8卷 235-248页

作者：王中光孙正明于维成 State Key Laboratory for Fatigue and Fracture of Materials Institute of Metal ResearchAcademia SinicaShenyang.110015China

Based mainly on the work done at the authors' laboratory in recent years,this paper examines what is currently known about the cyclic deformation and fatigue properties of metal matrix composites, with particular emphasis on discontinuous fiber (whisker or particulate)-reinforced Al composites. The following items are discussed:fatigue strength and life,cyclic deformation and microstructural evolution,microcrack initiation and growth,fatigue crack propagation behaviour.

关键词： metal matrix composite cyclic deformation and fatigue interfacial effect crack-trapping and bridging