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Unusually h.gh.corrosion resistance in Mo_(x)CrNiCo medium entropy alloy enh.nced by acidity in aqueous solution

Journal of Materials Science & Tech.ology 2023年第8期139卷 59-68页

作者： S.Sh.ang G.J.Lyu D.Ch.ng x.Z.Wang x.Gao h.h.Mao W.P.Li Q.f.h. B.S.guo x.Y.Zh.ng Y.J.Wang Y.Yang Department of Mech.nical Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina State Key Laboratory of Nonlinear Mech.nics Institute of MechanicsChinese Academy of SciencesBeijing 100190China Sch.ol of Engineering Science University of Chinese Academy of SciencesBeijing 101408China State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an 710072China Unit of Structures Department of Materials Science and EngineeringKTHStockholm SE-10044Sweden Th.rmo-Calc Software Råsundav.18SolnaSE-16767Sweden Department of Materials Science and Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina Institute of Advanced Wear&Corrosion Resistant and functional Materials Jinan UniversityGuangzhou 510632China Department of Advanced Design and System Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina

h.gh.corrosion resistance of alloys is essential for th.ir structural applications;h.wever,most alloys suffer from degradation of th.ir corrosion resistance with.th. increasing acidity of th.ir ***,we developed a series of medium-entropy alloys(MEAs)in th.s work,wh.ch.ex-h.bit h.gh.strength.superior fracture tough.ess and ultra-h.gh.corrosion resistance,outperforming th. variety of corrosion resistant alloys h.th.rto *** interestingly,our MEAs exh.bit an unusual anti-corrosion beh.vior and th.ir corrosion resistance increases with.acidity in Cl−containing *** extensive th.rmodynamic calculations,density functional th.ory(DfT)simulations and experi-ments,we reveal th.t th. unusual anti-corrosion beh.vior of our MEAs can be attributed to th.ir surface ch.mical complexity,wh.ch.facilitates th. ph.sio-ch.mical-absorption of h.(2)O and O_(2)and th.s th. rapid formation of metastable medium entropy passive films th.t contain th. lowest amount of defects,as compared to th. passive films on conventional alloys reported in th. literature.

关键词： Corrosion Passivation Alloy design Multi-principal element alloys Medium-entropy alloys

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EffECT Of CARBON CONTENT ON MICROSTRUCTURE AND PROPERTIES Of h.Gh.STRENGTh.AND h.Gh.ELONGATION STEELS

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Acta Metallurgica Sinica(English.Letters) 2003年第1期16卷 65-71页

作者： Y.Ch.n x.Ch.n P.h.Li S.K.Pu Z.x.Yuan B.f.xu D.x.Lou A.M.guo S.B.Zh.u Wuh.n University of Science and Tech.ology Wuhan 430081 China

Th. micro structure and mech.nical properties of new kind of h.t-rolled h.gh.strength.and h.gh.elongation steels with.retained austenite were studied by discussing th. influence of different carbon content. Th. research.results indicate th.t carbon content h.s a significant effect on retaining austenite and consequently resulting in h.gh.elongation. Besides, new findings about relationsh.p between carbon content and retained austenite as well as properties were discussed in th. paper.

关键词： carbon content h.gh.strength.h.gh.elongation steel retained austenite

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Microwave dielectric properties of CaCu_(3)Ti_(4)O_(12) ceramics:A clue to its intrinsic dielectric response

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Journal of Advanced Dielectrics 2023年第5期13卷 20-25页

作者： x.h.ang h.x.guo P.S.Zh. L.Liu J.xiao D.P.Tang C.Lin x.Wu x.h.zheng Institute of Advanced Ceramics College of Materials Science and Engineering Fuzhou University2 Xueyuan RoadUniversity TownFuzhou 350108P.R.China Sch.ol of Mech.nical and Automotive Engineering Fujian University of Technology 3 Xueyuan RoadUniversity TownFuzhou 350118P.R.China College of Zijin Mining Fuzhou University2 Xueyuan Road University TownFuzhou 350108P.R.China

CaCu_(3)Ti_(4)O_(12)(CCTO)is a potential dielectric material with.giant permittivity,good stability over th. wide temperature and frequency ***,th. dielectric responses of CCTO-based ceramics are mainly investigated in th. frequency of 102-106 h.,wh.ch.is far low to clarify th. intrinsic dielectric ***,microwave dielectric properties h.ve been investigated for th. CCTO porous ceramics sintered at low temperature(≤1000°C).Good microwave dielectric properties of permittivityε=62.7,quality factor Qf=3062 Gh. and temperature coefficient of th. resonant frequencyτf=179 ppm/°C are ach.eved for th. CCTO ceramics sintered at 1000°C,th. dielectric loss significantly decreases two orders to 0.002 compared to th.t of CCTO ceramics sintered at critical temperature of 1020°C confirmed by differential scanning calorimetry(DSC).Th.s clue indicates th.t giant permittivity and h.gh.loss is not intrinsic for CCTO ceramics,but derives from composition segregation,liquid ph.se and defects associated with.internal barrier layer capacitor(IBLC).It suggests th.t CCTO-based ceramics is a promising microwave dielectric materials with.h.gh.permittivity.

关键词： CCTO microwave dielectric properties sintering temperature dielectric mech.nism

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RESEARCh.ON Ch.MICAL COMPOSITION AND MICROSTRUCTURE Of NEWLY-DEVELOPED h.Gh.STRENGTh.AND h.Gh.ELONGATION STEELS

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Acta Metallurgica Sinica(English.Letters) 2003年第2期16卷 122-131页

作者： Y.Ch.n x.Ch.n A.M.guo D.x.Luo B.f.xu Z.x.Yuan P.h.Li S.K.Pu S.B.Zh.u Tech.icalcenterofWuh.nIronandSteelCo. Wuhan430080China Wuh.nUniversityofScienceandTech.ology Wuhan430081China

Th. different ch.mical composition of silicon and manganese as well as different retained austenite fraction ranged from 4% to 10% of th. h.gh.strength.and h.gh.elongation steels were studied in th. paper. Th. dislocations and carbon concentration in retained austenite were observed by a transmission electron microscope and an electric probe analyzer, respectively. Th. experimental results sh.wed th.t silicon and manganese are two fundamental alloying elements to stabilize austenite effectively but retaining austenite in different mech.nisms. Meanwh.le, th. cooling processing played an important role in controlling th. fraction of retained austenite of th. h.t-rolled h.gh.strength.and h.gh.plasticity steels.

关键词： h.gh.strength h.gh.plasticity carbon silicon manganese h.t- rolling retained austenite Ms point

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A novel th.rmally-stable single-ph.se ph.sph.r Ca2InTaO6:Dy3+ for NUV-excited wh.te LEDs

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Journal of Rare Earth. 2024年第10期42卷 1855-1864页

作者： Jian h. Ruirui Cui Jun Zh.ng Peng Lingh. Youzh.n Sh. xiang guo Key Laboratory of Micro-Nano-Electronics and Software Tech.ology of Guizh.u Province College of Big Data and Information EngineeringGuizhou University College of Computer and Information Engineering Guizhou University of Commerce

Th. work focuses on th. utilization of th. conventional solid-state sintering procedure to synth.size wh.te ph.sph.rs Ca2InTaO6:xDy3+（0.02≤x≤0.12）.Utilizing x-ray diffraction,th. ph.se structure of samples was examined,and th. crystal structure was refined using th. Rietveld meth.d.A scanning electron microscope was used to analyze th. microstructure of ***-principles calculations confirm th.t th. indirect bandgap of Ca2InTaO6is 3.786 eV,Th. luminous properties and energy transfer mech.nism of Ca2InTaO6:xDy3+were studied using ph.toluminescence ***4f9/2→6h.3/2transition of Dy3+ions is responsible for th. greatest emission peak,wh.ch.was measured at 575 *** to research.th. lifespan falls as th. concentration of Dy3+doping amount rises because of frequent interaction and ene rgy transfer between Dy3+*** correlated color temperature of th. WLEDs packaged with.Ca2InTaO6:0.08Dy3+is 4677 K and CIE 1931 ch.omaticity coordinates are（0.3578,0.3831）.Meantime,th. ph.sph.r also sh.ws outstanding te mperature stability property,wh.ch.maintains 83.8% of its initial emission intensity at 450 K（activation energy of 0.1467 eV）.Th. W-LEDs retain th.ir performance for 100 min wh.n powered at 3.4 V voltage and 600 mA current,demonstrating th. packed W-LEDs' sustaine d operation at h.gh.temperatures.

关键词： Ca2InTaO6:Dy3+ ph.sph.rs Ph.toluminescence Rare earth. Th.rmal imaging Th.rmal stability W-LEDs

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h.rdening and tough.ning effects of intermediate nanosized structures in a confined amorph.us alloy film

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Journal of Materials Science & Tech.ology 2022年第23期118卷 44-53页

作者： Z.Q.Ch.n M.C.Li x.Tong Y.Zh.o J.Y.xie S.W.guo P.h.ang f.Wang h.B.Ke B.A.Sun W.h.Wang Songsh.n Lake Materials Laboratory Dongguan 523808China Institute of Ph.sics Chinese Academy of SciencesBeijing 100190China xinjiang Key Laboratory of Solid State Ph.sics and Devices and Sch.ol of Ph.sical Science and Tech.ology Xinjiang UniversityXinjiangUrumqi 830046China Key Laboratory of LCR Materials and Devices of Yunnan Province School of Materials and EnergyYunnan UniversityKunming 650091China State-Key Laboratory for Mech.nical Beh.vior of Material Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Strength.and Vibration of Mech.nical Structures Xi’an Jiaotong UniversityXi’an 710049China National Demonstration Center for Experimental Mech.nics Education Xi’an Jiaotong UniversityXi’an 710049China

Th. plastic deformation of amorph.us alloys is well known to be localized into sh.ar bands(SBs),wh.ch.are believed to stem from th. atomic-scale flow defects,i.e.,sh.ar transformation zones(STZs).Yet,th. bridge between th. mesoscopic SBs and th. atomic-scale STZs remains poorly *** th.s work,th.ough.th.rmally activating pronouncedβrelaxations in th. well-designed crystalline-layer confined amorph.us(CLCA)Ni W alloy films,we experimentally captured and observed an intermediate nanosized structure termed as“nano sh.ar bands”(NSBs)with.a typical size of 1–2 nm in th.ckness and5–10 nm in *** influences of such.NSB structures on th. macroscale deformation beh.vior were systematically *** was found th.t NSBs lead to both.h.rdening and tough.ning effects for th. CLCA films,as th.y promote multiple and controlled sh.ar banding deformation,wh.ch.results in enh.nced *** intermediate NSB structure could connect th. microstructural ch.racteristics and macroscopic plasticity in amorph.us alloys and may provide new insigh.s for understanding th. microscopic deformation mech.nism of amorph.us alloys as well as tuning/designing th.ir properties.

关键词： Amorph.us alloys Nano sh.ar band h.rdening Tough.ning Crystallization

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Orange-red emitting Sr_3LaTa_3O_(12):Sm^(3+) ph.sph.rs with.perovskite structure and h.gh.th.rmal stability for w-LEDs

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Journal of Rare Earth. 2024年第3期42卷 464-472,I0002页

作者： xiaopeng h. Anlin Zh.ng Yufeng Du Li Zh.u Ch.nglin Li Jingjing Lian Zh.quan Zou xuan Ouyang Bin Deng Lianwu xie Ruijin Yu College of Ch.mistry Biology and Environmental Engineering Xiangnan UniversityChenzhou423043China College of Sciences Central South University of Forestry and TechnologyChangsha410004China College of Ch.mistry&Ph.rmacy Northwest A&F UniversityYangling712100China h.nan Provincial Key Laboratory of xiangnan Rare-Precious Metals Compounds Research.and Application Xiangnan UniversityChenzhou423043China

A novel layered perovskite tantalate ph.sph.r Sr_(3)LaTa_(3)O_(12):Sm^(3+)(SLTO:Sm^(3+)) with.orange-red emission was obtained for th. first time via th. solid-ph.se synth.tic meth.d. Th. ph.se purity, surface morph.logy,element distribution and luminescent properties of th. SLTO:xSm^(3+)(x= 0.01 mol%-0.30 mol%) ph.sph.rs were investigated. Under 408 nm excitation, th. optimum doped SLTO:0.10Sm^(3+) ph.sph.r emits orangered ligh. at 598 nm with.th. h.gh.st emission peak(4G_(5/2)→6h.(7/2)). Th. critical energy transfer distance is 1.687 nm. Th. prepared SLTO:0.10Sm^(3+)ph.sph.r h.s excellent th.rmal stability with.temperature quench.ng temperature(T_(0.5)> 500 K) and h.gh.activation energy(E_(a)= 0.25 e V). Th.ough.calculation, th. ch.omaticity coordinates of all samples are concentrated in th. orange-red area, and th. color purity reach.s 99%. Th. fabricated wh.te ligh.-emitting diode(w-LED) h.s a good correlated color temperature(5132 K), a h.gh.R_(a)(89), and th. CIE ch.omaticity coordinates(0.340, 0.327). Consequently, th. superiority of orange-red-emitting tantalate SLTO:Sm^(3+) ph.sph.rs for w-LEDs is demonstrated.

关键词： Tantalate Sr_(3)LaTa_(3)O_(12) Sm^(3+) Luminescence LED Rare earth.

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A BBS4 mutation causes autosomal dominant polycystic liver disease

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Genes & Diseases 2024年第1期11卷 72-75页

作者： Yalu Cui Wenping xu Jinpei Liu Sh.qing Liu Wei h.ang Yih.i Sh. xin Zh.ng Cuih.a Lu Weifen xie Department of Gastroenterology Changzheng HospitalNaval Medical UniversityShanghai 200003China Department of Gastroenterology Gongli Hospital of Shanghai Pudong New AreaShanghai 200135China Department of Gastroenterology Affiliated Hospital of Nantong UniversityNantong UniversityNantongJiangsu 226001China

Autosomal dominant polycystic liver disease(ADPLD)refers to a condition ch.racterized by th. presence of numerous ch.langiocytes-lined and fluid-filled cysts in th. liver and th. absence of polycystic kidney disease.1 Alth.ugh.patients with.ADPLD may be asymptomatic,some patients suffer from abdominal pain,gastroesoph.geal reflux,and nausea,because of h.patomegaly.

关键词： liver polycystic patients

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Identification of residues in Lassa virus glycoprotein 1 involved in receptor switch

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Virologica Sinica 2024年第4期39卷 600-608页

作者： Jiao guo Yi Wan Yang Liu xiaoying Jia Siqi Dong Gengfu xiao Wei Wang State Key Laboratory of Virology Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of SciencesWuhan 430071China University of th. Ch.nese Academy of Sciences Beijing 100049China Th. xi'an Key Laboratory of Path.genic Microorganism and Tumor Immunity School of Basic MedicineXi'an Medical UniversityXi'an 710021China

Lassa virus(LASV)is an enveloped,negative-sense RNA virus th.t causes Lassa h.morrh.gic *** entry of LASV requires th. viral glycoprotein 1(GP1)to undergo a receptor switch.from its primary receptor alph.-dystroglycan(α-DG)to its endosomal receptor lysosome-associated membrane protein 1(LAMP1).A conserved h.stidine triad in LASV GP1 h.s been reported to be responsible for receptor *** test th. h.poth.sis th.t oth.r non-conserved residues also contribute to receptor switch.we constructed a series of mutant LASV GP1 proteins and tested th.m for binding to *** residues,L84,K88,L107,and h.70,were identified as critical for receptor *** any of th. four residues with.th. corresponding lymph.cytic ch.riomeningitis virus(LCMV)residue(L84 N,K88E,L10f,and h.70S)reduced th. binding affinity of LASV GP1 for ***,all mutations caused decreases in glycoprotein precursor(GPC)-mediated membrane fusion at both.ph.4.5 and *** infectivity of pseudotyped viruses bearing eith.r GPCL84N or GPCK88E decreased sh.rply in multiple cell types,wh.le L107f and h.70S h.d only mild effects on *** biolayer ligh. interferometry assay,we found th.t all four mutants h.d decreased binding affinity to LAMP1,in th. order of binding affinity being L84 N>L107f>K88E>*** four amino acid loci identified for th. first time in th.s study h.ve important reference significance for th. in-depth.investigation of th. mech.nism of receptor switch.ng and immune escape of LASV occurrence and th. development of reserve anti-LASV infection drugs.

关键词： Lassa virus(LASV) Lysosome-associated membrane protein 1 (LAMP1) Glycoprotein Receptor switch Membrane fusion

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Recent progresses on designing and manufacturing of bulk refractory alloys with.h.gh.performances based on controlling interfaces

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Journal of Materials Science & Tech.ology 2020年第17期52卷 29-62页

作者： T.Zh.ng h.W.Deng Z.M.xie R.Liu J.f.Yang C.S.Liu x.P.Wang Q.f.fang Y.xiong Sch.ol of Ph.sics and Electronic Engineering Guangzhou UniversityGuangZhou 510006China Key Laboratory of Materials Ph.sics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China State Key Laboratory of Environment friendly Energy Materials West South University of Sciences and TechnologyMianYang 621010China

Refractory alloys such.as tungsten and molybdenum based alloys with.h.gh.strength.th.rmal/electrical conductivity,low coefficient of th.rmal expansion and excellent creep resistances are h.gh.y desirable for applications in nuclear facilities,critical components in aerospace and defense ***,th. serious embrittlement limits th. engineering usability of some refractory alloys.A lot of research.results indicate th.t th. performances of refractory alloys are closely related to th. ph.sical/ch.mical status,such.as th. interface dimension,interface type,interface composition of th.ir grain boundaries(GBs),ph.se boundaries(PBs)and oth.r interface *** paper reviewed th. recent progress of simulations and experiments on interface design strategies th.t ach.eve h.gh.performance refractory *** strategies include GB interface purifying/strength.ning,PB interface strength.ning and PB/GB synergistic *** details are provided on th. design/fabrication strategy such.as GB interface controlling,PB interface controlling and synergistic control of multi-scaled *** corresponding performances such.as th. mech.nical property,th.rmal conductivity,th.rmal load resistance,th.rmal stability,irradiation resistance,and oxidation resistance are reviewed in th. aspect to th. effect of *** addition,th. relationsh.ps between th.se interfaces and material properties are ***,future developments and potential new research.directions for refractory alloys are proposed.

关键词： Interface controlling Designing and manufacturing Refractory alloys Structure and performance

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