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Corrosion protection of NiNb metallic glass coatings for 316SS by magnetron sputtering

Journal of Materials Science & Technology 2021年第20期79卷 88-98页

作者： l.Jiang Z.Q.chen H.b.lu H.b.Ke Y.Yuan Y.M.Dong X.K.Meng School of Chemistry and life Sciences Suzhou University of Science and TechnologySuzhou 215009China Institute of Materials Engineering National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210009China Songshan lake Materials l.b.ratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China Institute of Materials Engineering Nanjing UniversityNantong 226019China College of Chemistry and Chemical Engineering Nantong UniversityNantong 226019China

Metallic glasses(MGs)appear as promising anti-corrosion coating materials due to their microstructural and physicochemical ***,we proposed magnetron sputtered NiNb thin film MG coatings(MGCs)with different structures and compositions for corrosion protection of 316 stainless steel in an aggressive saline *** properties of monolayered Ni_(50)Nb_(50) and Ni_(60)Nb_(40),as well as the multilayered Ni_(50)Nb_(50)/Ni_(60)Nb_(40)(at.%)MGCs,were characterized in terms of morphology and microstructural properties,as well as the anticorrosion *** the NiNb MGCs presented compact structure and the monolayered coatings exhibited preferable adhesion properties in comparison with the multilayered *** electrochemical tests and XPS results imply that the monolayered Ni_(50)Nb_(50) MGC with high Nb content resisted corrosion mainly due to the formation of stable passive film that contained abundant Nb_(2)O_(5) species,whereas the Ni_(60)Nb_(40) MGC with high Ni content showed week corrosion protection performance during long-term service due to the dissolution of Ni cations and the devastation of the coating *** with bit worse adhesion and more vulnerable Ni_(60)Nb_(40) layers,the multilayered Ni_(50)Nb_(50)/Ni_(60)Nb_(40) MGC possessed comparable corrosion resistance with the monolayered Ni_(50)Nb_(50) MG coating,which remained stable even after 32 days of *** performance should be ascribed to the combined eff;ect of the repassivation property for the sub-layers,the hindrance of propagation paths of micro-defects,and the obstruction of corrosive species by interfaces in the multilayered coating.

关键词： Magnetron sputtering NiNb Metallic glasses Multilayer Corrosion protection

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EVOlUTION OF ROUGHNESS ON THE SURFACE OF A STRAINED ElASTIC MATERIAl DUE TO STRESS-DRIVEN SURFACE DIFFUSION

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Acta Mechanica Sinica 1994年第1期10卷 16-26页

作者： l.b.Freund Division of Engineering Brown University Providence RI 02912 USA

The free energy of a stressed crystal is assumed to consist of elastic strain energy and surface energy, and the chemical potential for surface diffusion at constant temperature is obtained under this assumption. A gradient in chemical potential results in diffusive mass transport along the surface. The result is applied in considering the phenomena of instability of a flat surface in a stressed material under fluctuations in surface shape, and the transient evolution of surface roughness due to an initial perturbation in the nearly flat free surface of the material, both under plane strain conditions.

关键词： elastic material surface energy diffusion

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Mineralogy of the deep lower mantle in the presence of H2O

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National Science Review 2021年第4期8卷 21-28页

作者： Qingyang Hu Jin liu Jiuhua chen bingmin Yan Yue Meng Vitali b.Prakapenka Wendy l.Mao Ho-Kwang Mao Center for High Pressure Science and Technology Advanced Research(HPSTAR) Department of Geological Sciences Stanford University Center for Study of Matter under Extreme Conditions Department of Mechanical and Materials Engineering Florida International University High Pressure Coll.b.rative Access Team(HPCAT) X-ray Science Division Argonne National Laboratory Center for Advanced Radiation Sources University of Chicago

Understanding the mineralogy of the Earth's interior is a prerequisite for unravelling the evolution and dynamics of our planet. Here, we conducted high pressure-temperature experiments mimicking the conditions of the deep lower mantle（DlM, 1800–2890 km in depth） and observed surprising mineralogical transformations in the presence of water. Ferropericlase,（Mg,Fe）O, which is the most abundant oxide mineral in Earth, reacts with H;2;O to form a previously unknown（Mg,Fe）O;2;H;x;（x ≤ 1）phase. The（Mg,Fe）O;2;H;x;has a pyrite structure and it coexists with the dominant silicate phases,bridgmanite and post-perovskite. Depending on Mg content and geotherm temperatures, the transformation may occur at 1800 km for(Mg;0.6;Fe;0.4;)O or beyond 2300 km for(Mg;0.7;Fe;0.3;)O. The（Mg,Fe）O;2;H;x;is an oxygen excess phase that stores an excessive amount of oxygen beyond the charge balance of maximum cation valences(Mg;2+;, Fe;3+;and H;+;). This important phase has a number of far-reaching implications including extreme redox inhomogeneity, deep-oxygen reservoirs in the DlM and an internal source for modulating oxygen in the atmosphere.

关键词： lower mantle water-mantle interaction ferropericlase high pressure mantle mineralogy

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Improved mechanical properties in titanium matrix composites reinforced with quasi-continuously networked graphene nanosheets and in-situ formed carbides

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Journal of Materials Science & Technology 2022年第1期96卷 85-93页

作者： Q.Yan b.chen l.Cao K.Y.liu S.li l.Jia K.Kondoh J.S.li State Key l.b.ratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China Joining and Welding Research Institution Osaka University11-1 MihogaokaIbarakiOsaka 567-0047Japan

In order to construct quasi-continuously networked reinforcement in titanium(Ti)matrix composites,in this study,Ti-6 Al-4 V spherical powders were uniformly coated with a graphene nanosheet(GNS)layer by high energy ball milling and then consolidated by spark plasma *** showed that the GNS layer on the powder surface inhibited continuous metallurgy bonding between powders during sintering,which led to the formation of quasi-networked hybrid reinforcement structure consisting of insitu Ti C and remained *** networked GNSs/Ti64 composite possessed noticeably higher tensile strength but similar ductility to the Ti64 alloy,leading to both better tensile strength and ductility than the GNSs/Ti composite with randomly dispersed GNSs and Ti *** formation mechanism and the fracture mechanism of the networked hybrid reinforcement were *** results provided a method to fabricate Ti matrix composites with high strength and good ductility.

关键词： Titanium matrix composites(TMCs) Graphene Network structure Strength Ductility

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Application of Dorzagliatin in peritoneal dialysis patients with type 2 diabetes mellitus:A case report

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World Journal of Diabetes 2025年第1期16卷 204-210页

作者： Fang chen bo An Wen-cheng An Gang Fu Wei Huang Hui-Xian Yan Department of Endocrinology Beijing Haidian HospitalBeijing 100080China Department of Nephrology Beijing Haidian HospitalBeijing Haidian Section of Peking University Third HospitalBeijing 100080China

bACKGROUND Treating diabetes in dialysis patients remains a challenge,with many hypoglycemic drugs requiring dose adjustments or avoidance in these *** SUMMARY This report describes an 83-year-old female patient with a 30-year history of type 2 diabetes(T2DM)who had struggled to control her blood sugar for more than a *** had a history of high blood pressure for 30 years,had undergone continuous ambulatory peritoneal dialysis for more than two years,was 163 cm tall,weighed 77 kg,and had a body mass index of 28.98 kg/*** intensive insulin therapy at a daily dose of 150 units,adding Dorzagliatin at a dosage of 75 mg orally twice daily led to immediate blood sugar improvement and a gradual reduction in insulin *** one month of follow-up,the fasting plasma glucose was 6-8 mmol/l,and the 2-hour postprandial glucose was 8-12 mmol/*** To our knowledge,this report is the first to use Dorzagliatin to treat type 2 diabetes peritoneal dialysis patients with challenging glucose ***,a novel glucokinase activator primarily metabolized by the liver,exhibits no pharmacokinetic differences among patients with varying degrees of chronic kidney *** has a high plasma protein binding rate and may not be cleared by peritoneal dialysis,potentially offering a new glycemic control option for Type 2 diabetic patients on peritoneal dialysis.

关键词： Dorzagliatin Type 2 diabetes mellitus Peritoneal dialysis Glucokinase activator Glucose control Case report

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Crystal Structure of 5-(l-Menthyloxy)-3-bromo-4-(R)-(+)-Methylbenzylamino-2(5H)-Furanone

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Chinese Journal of Structural Chemistry 1999年第2期18卷 32-34页

作者： Geng, Z Huang, b chen, QH Capital Normal Univ Dept Chem Beijing 100037 Peoples R China beijing Normal Univ Dept Chem Beijing 100875 Peoples R China

The crystal structure of the title compound 1, C 22 H 30 brNO 3, was determined by X ray analysis at 296(1)K. The crystal.b.longs to othorhombic system, space group P2 12 12 1 with a=9.842(5), b=12.510(5), c=17.763(6) , V=2187(3)  3, Z=4, M r=436.37, D x =1.33 g/cm 3, μ =18.79 cm 1 , F(000) =912 and the final R=0.047 and R w=0.053 for 1429 observed reflections with I≥3σ(I). Structure analysis reveals that the absolute configuration at C 14 of the acetal carbon of the title compound is S.

关键词： crystal structure 2(5H) furanone absolute configuration.

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Effect of anti-fibrosis compound on collagen expression of hepatic cells in experimental liver fibrosis of rats

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World Journal of Gastroenterology 2000年第6期6卷 877-880页

作者： Wang lT Zhang b chen JJ Shanghai TCM Univ Shuguang Hosp Dept Hepatopathy Shanghai 200021 Peoples R China

INTRODUCTIONliver fibrosis is mainly characterized by theexcessive synthesis and decreased degradation ofextracellular matrix(ECM),especially the synthesisand deposition of *** all kinds of cellsin the liver have part... 详细信息

关键词： liver cirrhosis collagen hepatic stellate cells immunohistochemistry antifibrosis complex prescription rats

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DETERMINATION OF ISOTHERMAl SECTION OF Fe-Ni-Zr TERNARY SYSTEM AT 1198K

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Acta Metallurgica Sinica(English letters) 2007年第6期20卷 398-402页

作者： G.J. Zhou S. Jin l.b. liu H.S. liu Z.P. Jin School of Materials Science and Engineering Central-South UniversityChangsha 410083 China

The isothermal section of Fe-Ni-Zr ternary system at 1198K was experimentally determined using diffusion triple technique together with scanning electron microscopy （SEM） and electron probe microanalysis （EPMA ）. The results indicate that there are seven binary intermetallic phases, Fe2Zr, FeZr2, Nir2, NiZr, Ni10Zr7, Ni7Zr2 and Ni5Nr, found in the temary system, the binary compounds NiZr2 and FeZr2 show a homogeneity range and form a continuous solid solution, namely （Fe, Ni）Zr2 Five three-phase sections, γ（Fe,Ni）＋ Ni3Zr2 ＋ Ni5Zr,γ（Fe, Ni）＋ Ni7Zr2 ＋ Ni10Zr7, γ（Fe,Ni）＋ Fe2Zr ＋ Ni10Zr7, （Fe,Ni）Zr2 ＋ Fe2Zr ＋ Nil0Zr7, and （Fe,Ni）Zr2 ＋ NiZr ＋ Ni10Zr7, exist in the isothermal section. No ternary compound is observed.

关键词： Fe-Ni-Zr diffusion triple isothermal section phase diagram

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Glutamatergic CYlD deletion leads to aberrant excitatory activity in the basolateral amygdala:association with enhanced cued fear expression

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Neural Regeneration Research 2025年第11期20卷 3259-3272页

作者： Huidong li Faqin li Zhaoyi chen Erwen Wu Xiaoxi Dai Danni li Haojie An Shiyi Zeng Chunyan Wang li Yang cheng long School of life Sciences South China Normal UniversityGuangzhouGuangdong ProvinceChina School of life Sciences Guangzhou UniversityGuangzhouGuangdong ProvinceChina Guangdong Provincial Key l.b.ratory of Major Obstetric Diseases The Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina South China Normal University-Panyu Central Hospital Joint l.b.ratory of Translational Medical Research Panyu Central HospitalGuangzhouGuangdong ProvinceChina

Neuronal activity,synaptic transmission,and molecular changes in the basolateral amygdala play critical roles in fear ***(CYlD)is a deubiquitinase that negatively regulates the nuclear factor kappa-b *** is well studied in non-neuronal cells,yet underinvestigated in the brain,where it is highly *** studies have shown involvement of CYlD in the remodeling of glutamatergic synapses,neuroinflammation,fear memory,and anxiety-and autism-like ***,the precise role of CYlD in glutamatergic neurons is largely ***,we first proposed involvement of CYlD in cued fear *** next constructed transgenic model mice with specific deletion of Cyld from glutamatergic *** results show that glutamatergic CYlD deficiency exaggerated the expression of cued fear in only male ***,loss of CYlD in glutamatergic neurons resulted in enhanced neuronal activation,impaired excitatory synaptic transmission,and altered levels of glutamate receptors accompanied by over-activation of microglia in the basolateral amygdala of male ***,our study suggests a critical role of glutamatergic CYlD in maintaining normal neuronal,synaptic,and microglial *** may contribute,at least in part,to cued fear expression.

关键词： basolateral amygdala cued fear expression cylindromatosis deubiquitinase glutamate receptor 1 glutamatergic neuron microglial activation N-methyl-D-aspartate receptor 1 neuronal activation synaptic transmission

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Tensile and cyclic deformation response of friction-stir-welded dissimilar aluminum alloy joints:Strain localization effect

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Journal of Materials Science & Technology 2021年第14期73卷 91-100页

作者： P.l.Niu W.Y.li D.l.chen State Key l.b.ratory of Solidification Processing Shaanxi Key Laboratory of Friction Welding TechnologiesNorthwestern Polytechnical UniversityXi'an710072.China Department of Mechanical and Industrial Engineering Ryerson University350 Victoria StreetTorontoOntarioM5B2K3Canada

Cyclic deformation behavior of friction-stir-welded dissimilar AA2024-T351 to AA7075-T65 aluminum alloy joints was evaluated via stepwise tests at different strain rates,along with transmission electron microscopy examinations to characterize the precipitates required to assess internal *** backscatter diffraction was employed to observe the inhomogeneous microstructures of the FSWed *** localization appeared in the heat affected zone(HAZ)of AA2024 *** cyclic deformation of 500 cycles at a total strain amplitude of 0.5%,the strength of the dissimilar joints resumed basically to that of AA2024 base *** the AA2024 HAZ was obviously hardened,which should be attributed to the introduced dislocations during cyclic deformation *** hardening capacity of the joints increased with decreasing strain rate.

关键词： Friction stir welding Dissimilar aluminum alloys Strain localization Cyclic hardening Slip irreversibility

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