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Effect of friction on corrosion behaviors of AISI 304 and Cr26Mo1 stainless steels in different solutions

Journal of Iron and Steel Research International 2023年第12期30卷 2541-2556页

作者： Z.X.Dai S.l.jiang l.K.Ning X.D.Xu S.li D.l.Duan Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016LiaoningChina School of Materials Science and Engineering University of Science and Technology of ChinaHefei230026AnhuiChina liaoning Key laboratory of Aero-engine Materials Tribology Institute of Metal ResearchChinese Academy of SciencesShenyang110016LiaoningChina AnSteel lISCO Stainless Steel Co. Ltd.Guangzhou510760GuangdongChina

The corrosion and tribocorrosion behaviors of AISI 304 austenitic stainless steel and Cr26Mo1 ultrapure high chromium ferrite stainless steel in 3.5 wt.%NaCl and 0.5 mol/l h2SO4 solutions were *** electrochemical measurement technology was applied to identify electrochemistry behaviors during tribocorrosion tests in *** surface morphologies and compositions of the wear tracks were analyzed by scanning electron microscopy and Raman *** results showed that compositions of stainless steels,corrosive mediums and applied loads have great influence on tribocorrosion behaviors of stainless ***,the corrosion resistance in static state of stainless steels primarily dominates its tribocorrosion behavior;meanwhile,better mechanical properties are in favor of tribocorrosion ***,the corrosion rate is promoted significantly in 3.5%NaCl solution by friction,while the tendency is inconspicuous in 0.5 mol/l h2SO4 *** but not least,passive films on stainless steels can be wiped off by small friction *** the increase in applied load,the effect of friction converts to forming friction oxide film from removing passivation film,so that a critical load exists below which the friction force can promote the corrosion process extremely.

关键词： Tribocorrosion Stainless steel/PEEK friction pair Corrosive medium Applied load Microelectrode probe

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Experimental investigation of laser surface processing of flexure silicon nitride ceramic

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中国有色金属学会会刊：英文版 2006年第B02期16卷 558-565页

作者： SUN li A. P. MAlShE jiang Wen-ping P. h. MCClUSKEY Department of Mechanical Engineering University of Arkansas Fayetteville AR 72701 USA Technology ＆ Solutions Division Caterpillar Inc. Peoria IL 61629 USA

A continuous wave carbon dioxide (CO2) laser (λ=10.6μm) was employed to treat the surface of Si3N4 MOR (modulus of rupture) bars. The effects of the CO2 laser process on physical and mechanical properties of ground Si3N4 samples were investigated. Scanning electron microscopy (SEM) analysis shows that the area occupied by cavities and fracture is decreased by about 49.4% after laser treatments. Cross-sectional metallography results indicate that the secondary YSiAlON phase in the Si3N4 ceramic is softened/melted and flowed into the defects. Four-point bending tests show that the flexural strength of the treated samples is improved to 10.9%. Fractographic analysis show that the fracture origins move from the surface to subsurface. It is concluded that laser surface processing have significant effects on fracture behavior of flexure Si3N4 ceramic.

关键词：氮化硅陶瓷激光表面处理实验研究挠曲强度物理性质

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Aggregation-Induced Fluorogens in Bio-Detection,Tumor Imaging,and Therapy:A Review

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CCS Chemistry 2022年第2期4卷 420-436页

作者： Yekkuni l.Balachandran Xingyu jiang Shenzhen Key laboratory of Smart healthcare Engineering Department of Biomedical EngineeringSouthern University of Science and TechnologyNanshan DistrictShenzhenGuangdong 518055

Aggregation-induced emission(AIE)fluorogens produce strong,stable fluorescence upon aggregation,thus enabling a new frontier in bio-detection,cell imaging,and other biomedical *** this review,we summarize the recent developments of AIE fluorogen design strategy,bio-detection,cell imaging,tumor imaging,vascular imaging,and image-guided tumor *** highlight a section on the microfluidic approach to synthesize AIE nanoparticles(NPs)and current challenges and potentials of AIE NPs.

关键词： aggregation-induced emission NIR AIEgens two-photon AIEgens bio-detection bio-imaging image-guided therapy microfluidics

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A portable device for studying the effects of fluid flow on degradation properties of biomaterials inside cell incubators

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Regenerative Biomaterials 2019年第1期6卷 39-48页

作者： Wensen jiang Jiajia lin Alex h.Chen Jianwei Pan huinan liu Department of Bioengineering Materials Science and Engineering ProgramStem Cell Center Department of Mechanical Engineering University of CaliforniaRiversideRiversideCA 92521USA Department of Bioengineering University of CaliforniaRiversideRiversideCA 92521USA Department of Neurosurgery The First Affiliated Hospital of Zhejiang UniversityHangzhou 310003China

A portable device was designed and constructed for studying the properties of biomaterials in physiologically relevant fluids under controllable flow conditions that closely simulate fluid flow inside the *** device can fit entirely inside a cell incubator;and,thus,it can be used directly under standard cell culture *** impedance-driven pump was built in the sterile flow loop to control the flow rates of fluids,which made the device small and portable for easy deployment in the *** demonstrate the device functions,magnesium(Mg)as a representative biodegradable material was tested in the flow device for immersion degradation under flow versus static conditions,while the flow module was placed inside a standard cell *** flow rate was controlled at 0.1760.06 ml/s for this study;and,the flow rate is adjustable through the controller module outside of incubators for simulating the flow rates in the ranges of blood flow in human artery(0.050.43 ml/s)and vein(0.020.08 ml/s).Degradation of Mg under flow versus static conditions was characterized by measuring the changes of sample mass and thickness,and Mg2t ion concentrations in the immersion *** chemistry and morphology of Mg after immersion under flow versus static conditions were *** portable impedance-driven flow device is easy to fit inside an incubator and much smaller than a peristaltic pump,providing a valuable solution for studying biomaterials and implants(*** or ureteral stents)in body fluids under flow versus static conditions with or without cells.

关键词： portable flow device impedance-driven pump biomaterials body fluids magnesium(Mg)degradation

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U-Pb zircon geochronology, geochemistry and kinetics of the huaniushan A-type granite in Northwest China

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Chinese Journal Of Geochemistry 2012年第1期31卷 85-94页

作者： ZhU jiang lÜ Xinbiao CAO Xiaofeng MO Yalong ChEN Chao Faculty of Earth Resources China University of GeosciencesWuhan 430074China State Key laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China

The huaniushan granite is located at the Beishan orogenic belt, northwestern China. At the contact zone between the granite and marble, a hydrothermal Pb-Zn and skarn Au deposit is formed. lA-ICP-MS zircon U-Pb dating yielded a weighted mean 206Pb/238U age of 229.5±2.6 Ma (MSDW=0.93) for the huaniushan granite, imply-ing its late Triassic intrusion. Geochemistry analyses show that the huaniushan granite is enriched in Si, K, Na, and REE, and depleted in Mg and Ca, with contents of SiO2 (70.8% to 74.4%), Na2O+K2O (8.8% to 10.2%), CaO (0.93% to 1.44%), and MgO (0.14% to 0.48%). REE is characterized by obvious negative Eu anomaly. Rb, Th, U, K, Pb, Nb, Zr and hf elements are rich in the granite while Ba, Sr, P, Ti and Eu are deplete. The granite has a high (Zr+Nb+Ce+Y) abundance and 104 Ga/Al ratios. Petrology, major and trace elements data all indicate that the hua-niushan granite is A-type granite which intruded in a post-collisional extensional tectonic setting. The magma was dominantly sourced from partial melting of crustal intermediate-felsic igneous rocks. Intensive magmatic activities and Au-Cu-Mo mineralization occurred throughout the Beishan orogenic belt during the period from ca. 240 to 220 Ma.

关键词： A型花岗岩中国西北地区地球化学分析 U-Pb年代学锆石U-Pb年龄动力学 lA-ICP-MS 牛

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EFFECTS OF TREATMENT TEMPERATURE ON ThE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF Fe-N ThIN FIlMS

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Acta Metallurgica Sinica(English letters) 2007年第4期20卷 293-300页

作者： B.l. li h.M. Du X.F. Wang E.Y. jiang Z.Q.li P. Wu Department of Applied Physics Institute of Advanced Materials Physics School of Science Tianjin University Tianjin 300072 China Tianjin Key laboratory of low Dimensional Materials Physics and Preparing Technology Tianjin University Tianjin 300072 China

Fe-N thin films were fabricated on both 100Si and NaCl substrates by RF magnetron sputtering under low nitrogen partial pressure. The microstructure and magnetic properties of Fe-N thin films were investigated with the increase of the substrate temperature （Ts） and the annealing temperature （Ta）. It is more difficult for nitrogen atoms to enter the Fe lattice under higher Ts above 150℃. The phase evolution is visible at higher Ta above 200℃. The phase transformation of α＇＇-Fe16N2 occurred at 400℃. The change of crystal size with Ta was clearly visible from bright and dark field images. The clear high-resolution electron microscope （hREM） images of 110α, 111γ＇, 112α＇＇, and 200α＇＇ phases were observed. The interplanar distances from TEM （transmission electron microscope） and hREM match the calculated values very well. From the results of the vibrating sample magnetometer （VSM）, the good magnetic properties of Fe-N films were obtained at 150℃ of Ts and 200℃ of Ta, respectively.

关键词： Fe-N thin film magnetic property hREM α''-Fe16N2

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Two-dimensional numerical algorithm for water quality modeling in the topographically complicated river

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Journal of Environmental Sciences 2000年第4期12卷 469-473页

作者： Zeng, G. jiang, Y. Guo, h. huang, G.G.-h. Environmental Protection Institute Human University Hunan 410082 China

In this paper, a two-dimensional numerical calculation algorithm for the water quality modeling in the hengyang City section of the Xiangjiang River is researched considering the effect of the Dayuandu navigational key project. The research river is winding and has two branches resulted from an isle. The numerical calculation algorithm for the water quality modeling is set up on the basis of applying topographic map of the river course and the finite element method. The calculation result for the water quality modeling includes the concentration fields for various pollutants. The numerical calculation algorithm for the water quality modeling set up in this paper can be applied to shallow river with similar topographically complicated river course.

关键词： Algorithms Finite element method River pollution Rivers

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Relationship between Geological Structures and hydrocarbon Enrichment of Different Depressions in the Bohai Bay Basin

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Acta Geologica Sinica(English Edition) 2015年第6期89卷 1998-2011页

作者： jiang Youlu lIU hua SONG Guoqi WANG Yongshi lIU Pei lü Xueying China University of Petroeum (East China) SINOPEC Shengli Oilfield Company Shenzhen Branch of China National Offshore Oil Corporation ltd.

The Bohai Bay Basin contains many depressions with varying degrees of hydrocarbon enrichment associated with the geological structures of different depressions. This study discussed the relationship between the geological structures and hydrocarbon enrichment of the depressions in the Bohai Bay Basin. Based on the Paleogene strata distribution and the length to width ratio of different depressions, their geological structures are divided into three types in plan-view： open（length/width 〈 2）, narrow（length/width 〉 4） and transitional types（length/width 2-4）. In cross section, the geological structures can be divided into dustpan I, dustpan II and double-faulted types. Based on tectonic evolution and sedimentary characteristics, the depressions are classified into early-formed, inherited and late-formed categories. Generally, narrow depressions are mainly located in the northeast and southwest of the Bohai Bay Basin, while open depressions are dominantly distributed in the central area of the basin; late-formed depressions are mainly around the Bohai sea area, and early-formed depressions are mostly located in the periphery of the basin. Geological structures of the depressions control the formation of the source, reservoir and cap rocks as well as hydrocarbon accumulation setting, and further influence the pay zones and oil-bearing sequence. In detail, dustpan II and doublefaulted depressions mainly have A-type sags, which often possess better hydrocarbon generation conditions than dustpan I ones; hydrocarbons in open dustpan II depressions tend to accumulate in the central uplift areas or buried hill, while those in narrow dustpan I depressions always accumulate in gentle slope belts. The oil-bearing sequence for different evolutional depressions corresponds well with the sedimentary strata of the main development stages of depressions. In early-formed depressions, hydrocarbons are mainly enriched in deeply buried reservoirs, while in late-formed depressions hydroca

关键词： geological structure of depression hydrocarbon enrichment fault migration system,dustpan-shaped depression Bohai Bay Basin

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Coarsening behavior of γ' and γ'' phases in Gh4169 superalloy by electric field treatment

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International Journal of Minerals,Metallurgy and Materials 2013年第9期20卷 861-866页

作者： lei Wang Yao Wang Yang liu Xiu Song Xu-dong lü Bei-jiang Zhang Key laboratory for Anisotropy and Texture of Materials Northeastern University Department of high-temperature Materials Central Iron and Steel Research Institute

The coarsening behaviors of γ′ and γ″ phases in Gh4169 alloy aged at 1023 and 1073 K with electric field treatment （EFT） were investigated by transmission electron microscopy （TEM） and positron annihilation lifetime spectroscopy （PAlS）. It is demonstrated that precipitation coarsening occurs, and the growth activation energies of γ′ and γ″phases can be decreased to 115.6 and 198.1 ***1-1, respectively, by applying the electric field. The formation of a large number of vacancies in the matrix is induced by EFT. Due to the occurrence of vacancy migration, the diffusion coefficients of A1 and Nb atoms are increased to be 1.6-5.0 times larger than those without EFT at 1023 or 1073 K. Furthermore, the formation of vacancy clusters is promoted by EFT, and the increase in strain energy for the coarsening of γ′ and γ″ phases can be counterbalanced by the formation of vacancy clusters.

关键词： superalloys nickel alloys precipitation electric fields aging vacancies

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New algorithm for hub-and-spoke topological virtual networks embedding problem

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The Journal of China Universities of Posts and Telecommunications 2012年第1期19卷 55-61页

作者： lIU jiang hUANG Tao ChEN Jian-ya lIU Yun-jie lÜ Bo Key laboratory of Universal Wireless Communications Ministry of EducationBeijing University of Posts and TelecommunicationsBeijing 100876China

The virtual network embedding/mapping problem is a core issue of the network virtualization. It＇s mainly concerned with how to map virtual network requests to the substrate network efficiently. Previous researches mainly focus on developing heuristic algorithms for general topology virtual network request. In this paper, we propose a new algorithm for the hub-and-spoke （hAS） topology virtual request. The characters of the hAS topology are exploited to develop the new algorithm. The simulation results show that the new algorithm greatly enhances the performance of revenue/cost （R/C） ratio while the hAS topology request arrives.

关键词： virtual network embedding general topology hAS topology

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