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Acta Metallurgica sinica(English Letters) 2005年第6期18卷 707-713页

作者： c.c. Zhang c.s. yang G.F. Ding s. Q. Qian J.s. Wu National Key Laboratory of Nano/Micro Fabrication Technology Key Laboratory for Thin Film and Microfabrication of Ministry of Education Institute of Micro and Nano Science and Technology Shanghai Jiaotong University Shanghai 200030 China school of Material science and Engineering Shanghai Jiaotong University Shanghai 200030 China

Microstructure and phase transformation behaviors of the film annealed at different temperatures were studied by X-ray diffractometry （XRD）, transmission electron microscopy and differential scanning calorimeter （Dsc）. Also tensile tests were examined. For increasing annealed temperature, multiple phase transformations, transformations via a B19-phase or direct martensite/austenite transformtion are observed. The TiNiPd thin film annealed at 750℃ had relatively uniform martensite/austenite transformtion and shape memory effect. Martensite/austenite transformtion was also found in strain-temperature curves. subsequent annealing at 450℃ had minor effect on transformation temperatures of Ti-Ni-Pd thin films but resulted in more uniform transformation and improved shape memory effect.

关键词： Ti-Ni-Pd thin films microstructure martensitic phase transformation,shape memory effect

Hierarchical V_(3)s_(4)/c nanofibers with fast kinetics for superior alkali metal batteries

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Rare Metals 2024年第4期43卷 1836-1844页

作者： Li chen Zhi-Xin Rao Zhi chen Zhao-Hui Wu shuai yang Zhi-Jun Feng Hui-Yong yang Fan-Yan Zeng Xi-Bao Li Jin-yang Hu Jun-Tong Huang school of Materials science and Engineering Nanchang Hangkong UniversityNanchang330063China school of Aeronautical Manufacturing Engineering Nanchang Hangkong UniversityNanchang330063China

Owing to the numerous benefits,including low c.s. and great theoretical capacity,V3s4 has been a research hotspot for Li^(+)/Na^(+)/K^(+) ***,the V_(3)s_(4) electrode with long cycling stability and high specific capacities continues to pose significant *** this work,vacuum vulcanization is combined with electrospinning to synthesize V_(3)s_(4)/c composite nanofibers(V_(3)s_(4)@cNF).

关键词： composite fibers kinetics

cognition on oxidation behavior of Ni-based superalloy GH4742 when exposed to water vapor

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Journal of Materials science & Technology 2024年第7期174卷 15-22页

作者： H.Xu s.F.yang E.H.Wang c.Y.Guo Y.s.Liu X.M.Hou Y.L.Zhang state Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Institute for carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The oxidation behavior of Ni-based superalloy GH4742 exposed to water vapor was investigated at 900-1100℃for 50 h in Ar+20%H_(2)O,with Ar+20%O_(2)included for *** presence of H_(2)O is adverse to formation of continuous cr_(2)O_(3)oxide layer but contributes to generation of big *** on this,Ni^(2+)and co^(2+)are more easily to diffuse towards the outermost oxide layer(OOL),forming non-protective Ni-and co-rich oxides with high *** leads to a higher weight gain in Ar+20%H_(2)O than that in Ar+20%O_(2).At elevated temperatures,the spallation of oxide scale occurs while the consumption of cr is reduced in Ar+20%H_(2)O,and the contents of Ni-and co-rich oxides at this moment are reduced in the *** oxidation mechanism was also disc.s.ed.

关键词： GH4742 superalloy H_(2)O Diffusion Oxidation Mechanism

Photo-enhanced uranium recovery from spent fuel reproc.s.ing wastewater via s-scheme 2D/0D c_(3)N_(5)/Fe_(2)O_(3) heterojunctions

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susMat 2024年第2期4卷 41-50页

作者： Qi Meng Linzhen Wu Xiaoyong yang Ying Xiong Fanpeng Kong Tao Duan state Key Laboratory of Environment-friendly Energy Materials NuclearWaste and Environmental Safety Key Laboratory of DefenseSouthwest University of Science and TechnologyMianyangSichuanChina MIIT Key Laboratory of critical Materials Technology for New Energy conversion and storage Harbin Institute of TechnologyHarbinHeilongjiangChina Department of Materials science and Engineering KTH Royal Institute of TechnologyStockholmSweden

Re-extracting environmentally transportable hexavalent uranium from wastew-ater produced by spent fuel reproc.s.ing using the photocatalytic technology is a crucial strategy to avoid uranium pollution and recover nuclear fuel strategic ***,we have designed s-scheme 2D/0D c_(3)N_(5)/Fe_(2)O_(3)heterojunction photocatalysts based on the built-in electric field and the energy band bend-ing theory,and have further revealed the immobilization proc.s. of hexavalent uranium conversion into relatively insoluble tetravalent uranium in terms of thermodynamics and *** to the results,the hexavalent uranium removal and recovery ratios in wastewater are as high as 93.38%and 83.58%,***,c_(3)N_(5)/Fe_(2)O_(3)heterojunctions also exhibit satisfactory cat-alytic activity and selectivity even in the presence of exc.s.ive impurity cations(including Na^(+),K^(+),ca^(^(2+)),Mg^(2+),sr^(2+),and Eu^(3+))or various organics(such as xylene,tributylphosphate,pyridine,tannic acid,citric acid,and oxalic acid).It is believed that this work can provide a potential opportunity for s-scheme heterojunction photocatalysts to re-enrich uranium from spent fuel wastewater.

关键词： nuclear wastewater s-scheme heterostructure uranium recovery

convergence,scalarization and continuity of Minimal solutions in set Optimization

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Journal of the Operations Research society of china 2024年第3期12卷 773-793页

作者： Karuna c.s.Lalitha Department of Mathematics University of DelhiDelhiDelhi110007India Department of Mathematics University of Delhi South CampusNew DelhiDelhi110021India

The paper deals with the study of two different aspec.s.of stability in the given space as well as the image space,where the solution concepts are based on a partial order relation on the family of bounded subsets of a real normed linear *** first aspect of stability deals with the topological set convergence of families of solution sets of perturbed problems in the image space and Painlevé–Kuratowski set convergence of solution sets of the perturbed problems in the given *** convergence in the given space is also established in terms of solution sets of scalarized perturbed *** second aspect of stability deals with semicontinuity of the solution set maps of parametric perturbed problems in both the spac.s.

关键词： Topological convergence Painlevé-Kuratowski convergence Upper semicontinuity Lower semicontinuity stability scalarization

Geochemistry and depositional environment of fuc.s.te quartzites from sargur Group,western Dharwar craton,India

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Acta Geochimica 2024年第3期43卷 555-570页

作者： c.s.sindhuja G.Harshitha c.Manikyamba K.s.V.subramanyam csIR(council of scientific and Industrial Research)-National Geophysical Research Institute(NGRI) Uppal RoadHyderabad 500007India

Meso-Neoarchean fuc.s.te quartzites are present in different stratigraphic positions of Dharwar craton including the oldest(~3.3 Ga)sargur Group of western Dharwar *** present study deals with the petro-graphic and geochemical characteristics of the fuc.s.te quartzites from the Ghattihosahalli belt to evaluate their genesis,depositional setting and the enigma involved in the ancient sedimentation *** major mineral assemblages include quartz,fuc.s.te,and feldspars along with acc.s.ory kyanite and *** geochemical com-positions are characterized by high siO_(2),Al_(2)O_(3),low MgO,caO,strongly enriched cr(1326–6899 ppm),Ba(1165–3653 ppm),sr(46–210 ppm),V(107–868 ppm)and Zn(11–158 ppm)contents compared to the upper continental crust(Ucc).The Ucc normalized rare earth element(REE)patterns are characterized by depleted light REE[(La/sm)Ucc=0.33–0.95]compared to heavy REE[(Gd/Yb)_(Ucc)=0.42–1.65]with conspicuous positive Eu-anomalies(Eu/Eu^(*)=1.35–18.27)characteristic of hydrothermal solutions evidenced through the interlayered *** overall major and trace element systematics reflect a combined mafic-felsic provenance and suggest their deposition at a passive continental margin *** comprehensivefield,petrographic,and geo-chemical studies indicate that these quartzites are infiltrated by cr-richfluids released during high-grade metamorphism of associated ultramafic *** sargur and the subse-quent Dharwar orogeny amalgamated diverse lithounits from different tectonic.s.ttings,possibly leading to the release of cr-richfluids and the formation of fuc.s.te quartzite during or after the *** sug-gest a pre-existing stable crust prior to the sargur Group and the link between orogenic events and various mineral deposits in the Dharwar craton.

关键词： Dharwar craton Ghattihosahalli Fuc.s.te quartzite Provenance Depositional setting

Mechanism of Primary Frequency Regulation for Battery Hybridization in Hydropower Plant

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csEE Journal of Power and Energy systems 2024年第5期10卷 2127-2137页

作者： Yiwen Liao Weijia yang Zhecheng Wang Yifan Huang c.Y.chung state Key Laboratory of Water Resourc.s.and Hydropower Engineering science Wuhan UniversityWuhan 430072China Department of Electrical Engineering The Hong Kong Polytechnic UniversityHong KongChina

Battery hybridization in hydropower plants is a hydropower flexibility enhancement technology innovation that can potentially expand hydropower’s contributions to the grid,but its fundamental characteristics and influencing mechanisms are still *** this paper,primary frequency regulation(PFR)performance and the mechanism of this new technology are studied.A battery hybridized hydropower plant(BH-HPP)model,based on a field-measured-data-based hydropower plant(HPP)model and a verified battery simplified model,is *** of system stability and dynamics is undertaken for three different battery control strategies by root loc.s.and participation factor *** to conventional HPPs,analysis results theoretically reveal BH-HPP can not only accelerate system regulation rapidity but also effectively enlarge HPP stability region during PFR *** domain simulation verifies the results and further shows synthetic control has better performance among introduced ***,initial design ranges of control parameters considering battery capacity and a renewable energy source scenario c.s. are also *** work could provide theoretical support for flexibility enhancement solutions for hydropower systems.

关键词： Battery hybridization dynamic response hydropower plant primary frequency regulation stability

Early Phases of star Formation: Testing chemical Tools

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Research in Astronomy and Astrophysics 2024年第1期24卷 96-118页

作者： N.c.Martinez s.Paron cONIcET-Universidad de Buenos Aires.Instituto de Astronomía y Física del Espacio Ciudad Universitaria(C1428EGA)Ciudad Autónoma de Buenos AiresArgentina

star-forming proc.s.es strongly influence the IsM ***,many high-quality databases are available at millimeter *** them,it is possible to carry out studies that review and deepen previous *** these studies involve large samples of sourc.s.it is preferred to use direct tools to study the molecular *** the aim of testing these tools such as the use of the HcN/HNc ratio as a thermometer,and the use of H^(13)cO^(+),Hc_(3)N,N_(2)H^(+) and c_(2)H as "chemical cloc.s." we present a molecular line study toward 55 sourc.s.representing massive young stellar objec.s.at different evolutionary stages:infrared dark clouds(IRDcs),highmass protostellar objec.s.HMPOs),hot molecular cores(HMcs) and ultracompact H II *** found that the use of the HcN/HNc ratio as a universal thermometer in the IsM should be taken with care because the HcN optical depth is a big issue that can affect the ***,this tool should be utilized only after a careful analysis of the HcN spectrum,checking that no line,neither the main nor the hyperfine ones,presents absorption *** point out that the analysis of the emission of H^(13)cO^(+),Hc_(3)N,N_(2)H^(+) and c_(2)H could be useful to trace and distinguish regions among IRDcs,HMPOs and *** molecular line widths of these four species increase from the IRDc to the HMc.s.age,which can be a consequence of the gas dynamics related to the starforming proc.s.es taking place in the molecular *** results not only contribute with more statistics,acting as a probe of such chemical tools,useful to obtain information in large samples of sourc.s.but also complement previous works through the analysis of other types of sourc.s.

关键词： stars:formation IsM:molecules IsM:clouds

Re-usable cd_(0.9)Zn_(0.1)s-ZnO@c/PVDF piezo-photocatalytic film with exceptional hydrogen evolution capability triggered by the synergetic advantages of piezoelectricity and s-scheme heterojunction

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Journal of Energy chemistry 2024年第9期96卷 164-176页

作者： Ping su Dong Zhang Minghui Zhu Tengteng Liang Nan yang Huaihao Zhao Dafeng Zhang Junchang Liu Peiqing cai Xipeng Pu school of Materials science and Engineering Shandong Provincial Key Laboratory of Chemical Energy Science and Novel Cell TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina school of Physics science and Information Technology Shandong Key Laboratory of Optical Communication Sciencend TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina college of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018ZhejiangChina

Piezoelectric materials have advantages of fine-tuning photocatalytic performance through harvesting mechanical energy and open a new avenue in facilitating green catalytic ***,polyvinylidene fluoride(PVDF),a flexible piezoelectric material,was introduced to synthesize a novel cd_(0.9)Zn_(0.1)s-ZnO@c/PVDF(c.s.ZO@c/PVDF)piezo-photocatalytic film by spin coating and immersion phase conversion *** from the piezoelectricity of PVDF and the internal electric field(IEF)of c.s.ZO@c.s.ep-scheme(s-scheme)heterojunction,c.s.ZO@c/PVDF was able to induce a hydrogen generation rate of 34.9 mmol g^(−1)h^(−1)activated by ultrasound and visible light(U-L),which is∼17.5 times of cd_(0.9)Zn_(0.1)s/PVDF(c.s.PVDF)and∼7.4 times of the photocatalysis rate activated by visible light only(L).Piezoelectric measurements and cOMsOL simulation illustrated the excellent piezoelectricity of c.s.ZO@c/PVDF film,which exhibits a piezoelectric coefficient(d33)of 9.9 pm V−1 and a piezoelectric potential of 874 mV(under 0.5 MPa).The reaction mechanism for the exceptional piezo-photocatalytic performance was finally disclosed through density functional theory(DFT)calculation and electrochemical *** study enriches the application scope of piezoelectric materials in sustainable energy catalysis and provides a new direction to develop efficient piezoelectric photocatalysts.

关键词： Piezo-photocatalysis Heterojunction cd_(0.9)Zn_(0.1)s Zno@c PVDF

computational screening of Pt1@Ti_(3)c_(2)T_(2)(T=O,s)MXene catalysts for Water-Gas shift Reaction

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Prec.s.on chemistry 2024年第2期2卷 70-80页

作者： yang Meng Haiyan Wang Jin-Xia Liang chun Zhu Jun Li school of chemistry and chemical Engineering Guizhou UniversityGuiyang 550025China Department of chemistry and Guangdong Provincial Key Laboratory of catalytic chemistry Southern University of Science and TechnologyShenzhen 518055China Department of chemistry and Engineering Research center of Advanced Rare-Earth Materials of Ministry of Education Tsinghua UniversityBeijing 100084China

single-atom catalysts(sAcs)provide an oppor-tunity to elucidate the catalytic mechanism of complex reactions in heterogeneous *** low-temperature water-gas shift(WGs)reaction is an important industrial technology to obtain high purity ***,we study the catalytic activity of Pt1@Ti_(3)c_(2)T_(2)(T=O,s)sAcs,where one subsurface Ti atom with three T vacancies in the functionalized Ti_(3)c_(2)T_(2)(T=O,s)MXene is substituted by one Pt atom,for the low-temperature show that Pt1@Ti_(3)c_(2)T_(2)provides an excellent platform for the WGs reaction by its bowl-shaped vacancy derived from the Pt1 single atom and three T defec.s.surrounding ***,Pt1@Ti_(3)c_(2)s_(2)sAc has higher catalytic performance for the WGs reaction,due to the weaker electronegativity of the s atom than the O atom,which significantly reduc.s.the energy barrier of H*migration in the WGs reaction,which is often the rate-determining *** the most favorable redox mechanism of the WGs reaction on Pt1@Ti_(3)c_(2)s_(2),the rate-determining step is the dissociation of OH*into O*and H*with the energy barrier as low as 1.12 *** results demonstrate that Pt1@Ti_(3)c_(2)s_(2)is promising in the application of MXenes for low-temperature WGs reactions.

关键词： single-atom catalyst(sAc) density functional theory(DFT) water gas shift(WGs)reaction defective MXene thermocatalysis