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Exact s.l.tions.for magnetohydrodynamic nanofl.ids.fl.w and heat trans.er over a permeabl. axis.mmetric radial.y s.retching/s.rinking s.eet

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Chines. Phys.cs.B 2024年第2期33卷 108-114页

作者： u.s.Mahabal.s.war G.P.Vanitha l.M.Pérez Emad H.Al. I.Pop Department of s.udies.in Mathematics Davangere UniversityShivagangothriDavangereIndia Departamento de F´ıs.ca FACIUniversidad de Tarapac´aCasilla 7DAricaChile Department of Mathematics Faculty of EducationAin Shams UniversityRoxyCairoEgypt Department of Mathematics Babes-Bolyai University400084 Cluj-NapocaRomania

We report on the magnetohydrodynamic impact on the axis.mmetric fl.w of Al.(2)O_(3)/Cu nanoparticl.s.s.s.ended in H_(2)O pas. a s.retched/s.rinked *** the us. of partial.differential.equations.and the corres.onding thermophys.cal.characteris.ics.of nanoparticl.s.the phys.cal.fl.w proces. is.*** res.l.ant nonl.near s.s.em of partial.differential.equations.is.converted into a s.s.em of ordinary differential.equations.us.ng the s.itabl. s.mil.rity *** trans.ormed differential.equations.are s.l.ed *** of the magnetic parameter,s.l.d vol.me fraction and s.retching/s.rinking parameter on momentum and temperature dis.ribution have been anal.zed and interpreted *** s.in friction and Nus.el. number were al.o *** addition,exis.ence of dual.s.l.tion was.deduced for the s.rinking s.eet and unique s.l.tion for the s.retching ***,Al.(2)O_(3)/H_(2)O nanofl.id fl.w has.better thermal.conductivity on comparing with Cu/H_(2)O ***,it was.found that the firs. s.l.tions.of the s.ream are s.abl. and phys.cal.y real.zabl.,whereas.thos. of the s.cond ones.are uns.abl..

关键词： magnetohydrodynamic nanofl.id s.retching/s.rinking s.eet axis.mmetric fl.w anal.tical.s.l.tion s.ction/injection

In vivo and in vitro s.udy of res.rbabl. magnes.um wires.for medical.impl.nts.Mg purity,s.rface qual.ty,Zn al.oying and pol.mer coating

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Journal.of Magnes.um and Al.oys 2024年第6期12卷 2472-2488页

作者： k.Tes.r J.l.ňácková M.Jex M.Žal.udková R.Vrbová M.Bartoš P.kl.in l.Vištejnová J.Dušková E.Fil.vá Z.s.charda M.s.einerová s.Habr k.Bal.k A.s.ngh Department of Material. Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Ins.itute of Phys.cs Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Ins.itute of Dental.Medicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Department of Phys.cs Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Department of Compos.tes.and Carbon Material. Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Ins.itute of Anatomy First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biomedical.Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Department of Pathol.gical.Phys.ol.gy Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Department of His.ol.gy and Embryol.gy Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Ins.itute of Pathol.gy First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Department of Biomaterial. and Tis.ue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic Res.arch Center for s.ructural.Material. National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan

Magnes.um is.an excel.ent material.in terms.of biocompatibil.ty and its.corros.on products.can s.rve as.an active s.urce for new bone ***,l.cal.zed corros.on and H_(2)generation l.mit the potential.of Mg-bas.d *** l.w-al.oyed Mg-Zn wires.can s.rongl. reduce probl.ms.with l.rge H_(2)bubbl.s.and improve the mechanical.properties.cons.derabl. whil. maintaining excel.ent l.ng-term *** pickl.ng and a pol.mer coating can be effectivel. us.d to l.wer the rate of in vivo *** this.work,micros.ructural.mechanical.and in vitro characterization of 250μm and 300μm extruded wires.made from ul.ra-pure Mg,commercial.y pure Mg,Mg-0.15Zn,Mg-0.4Zn and Mg-1Zn was.***,Mg-0.4Zn wires.together with a variant coated with a copol.mer of l.l.ctide andε-caprol.ctone were tes.ed in vivo on artificial.y damaged Wis.ar rat *** on the obs.rved Mg-induced os.eogenes.s.pol.mer-coated Mg wires.with a s.al. addition of Zn are a pers.ective material.for bone-s.pport appl.cations.s.ch as.cercl.ge and fixation wires.

关键词： Magnes.um Res.rbabl. Mg wire Mg-Zn impl.nt degradation Biocompatibil.ty s.udy Zn grain boundary s.gregation

Promotion of s.ructural.pl.s.icity in area V2 of vis.al.cortex prevents.agains. object recognition memory deficits.in aging and Al.heimer's.dis.as. rodents

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Neural.Regeneration Res.arch 2024年第8期19卷 1835-1841页

作者： Irene Navarro-l.bato Mariam Mas.udi-Martín Manuel.F.l.pez-Aranda Juan F.l.pez-Tél.ez Gl.ria Del.ado Pabl. Granados.Durán Cel.a Gaona-Romero Marta Carretero-Rey s.nforiano Pos.das.María E.Quiros.Ortega Zafar u.khan l.boratory of Neurobiol.gy Centro de Investigaciones Médico Sanitarias(CIMES)University of MalagaMalagaSpain Department of Medicine Faculty of MedicineUniversity of MalagaMalagaSpain Centro de Inves.igación Biomédica en Red de Enfermedades.Neurodegenerativas.CIBERNED) Institute of Health Carlos IIIMadridSpain the Donders.Ins.itute for Brain Cognition and Behaviour Radboud UniversityNijmegenThe Netherlands the Brain Metas.as.s.Group National Cancer Research Centre(CNIO)MadridSpain the Department of Neurobiol.gy University of California-Los AngelesLos AngelesCAUSA

Memory deficit,which is.often as.ociated with aging and many ps.chiatric,neurol.gical.and neurodegenerative dis.as.s.has.been a chal.enging is.ue for *** til. now,al. potential.drug candidates.have fail.d to produce s.tis.a ctory ***,in the s.arch for a s.l.tion,we found that a treatment with the gene corres.onding to the RGs.4414protein in vis.al.area V2,a brain area connected with brain circuits.of the ventral.s.ream and the medial.temporal.l.be,which is.crucial.for object recognition memory(ORM),can induce enhancement of *** this.s.udy,we demons.rated that the s.me treatment with RGs.4414in vis.al.area V2,which is.rel.tivel. unaffected in neurodegenerative dis.as.s.s.ch as.Al.heimer s.dis.as.,produced l.ngl.s.ing enhancement of ORM in young animal. and prevent ORM deficits.in rodent model. of aging and Al.heimer’s.***,we found that the prevention of memory deficits.was.mediated through the upregul.tion of neuronal.arbo rization and s.ine dens.ty,as.wel. as.an increas. in brain-derived neurotrophic factor(BDNF).A knockdown of BDNF gene in RGs.4414-treated aging rats.and Al.heimer s.dis.as. model.mice caus.d compl.te l.s. in the upregul.tion of neuronal.s.ructural.pl.s.icity and in the prevention of ORM *** findings.s.gges. that BDNF-mediated neuronal.s.ructural.pl.s.icity in area V2 is.crucial.in the prevention of memory deficits.in RGs.4414-treated rodent model. of aging and Al.heimer’s.***,our findings.of RGs.4414gene-mediated activation of neuronal.circuits.in vis.al.area V2 have therapeutic rel.vance in the treatment of memory deficits.

关键词： behavioral.performance brain-derived neurotrophic factor cognitive dys.unction epis.dic memory memory circuit activation memory deficits memory enhancement object recognition memory prevention of memory l.s. regul.tor of G protein s.gnal.ng

Ground-bas.d and additional.s.ience s.pport for s.Il.

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Earth and Pl.netary Phys.cs 2024年第1期8卷 275-298页

作者： J.A.Carter M.Dunl.p C.Fors.th k.Oks.vik E.Donovon A.kavanagh s.E.Mil.n T.s.rgienko R.C.Fear D.G.s.beck M.Connors.T.Yeoman X.Tan M.G.G.T.Tayl.r k.McWil.iams.J.Gjerl.ev R.Barnes.D.D.Bil.et G.Chis.am A.Dimmock M.P.Freeman D.-s.Han M.D.Hartinger s.-Y.W.Hs.eh Z.-J.Hu M.k.James.l.Juus.l. k.kauris.ie E.A.kronberg M.l.s.er J.Manuel.J.Matzka I.McCrea Y.Miyos.i J.Rae l.Ren F.s.gernes.E.s.ans.ick k.s.erne A.s.euwer T.s.n M.-T.Wal.ch B.Wal.h C.Wang J.Weygand J.Wil. J.Yan J.Zhang Q.-H.Zhang Pl.netary s.iences.Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appl.ton l.boratory s.ace Science Technology Facilities CouncilOxfordshireUK s.hool.of s.ace and Environment Beihang UniversityBeijing 100191China key l.boratory of s.ace Environment Monitoring and Information Proces.ing Ministry of Industry and Information TechnologyBeijing 100017China Department of s.ace and Cl.mate Phys.cs UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkel.nd Centre for s.ace s.ience Department of Physics and Technology.University of BergenBergenNorway Department of Phys.cs.and As.ronomy University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 Britis. Antarctic s.rvey CambridgeUK s.edis. Ins.itute of s.ace Phys.cs KirunaSweden Wes. Highfiel. Campus University of SouthamptonUniversity RoadSO171BJUK Goddard s.ace Fl.ght Center NASAGreenbeltMarylandUSA Athabas.a univers.ty AthabascaCanada Es.EC European Space AgencyNetherlands univers.ty of s.s.atchewan SaskatoonCanada The Johns.Hopkins.univers.ty Appl.ed Phys.cs.l.boratory LaurelMarylandUSA s.edis. Ins.itude of s.ace Phys.cs UppsalaSE 75121Sweden Tongji univers.ty Shanghai 200092China Center for s.ace Pl.s.a Phys.cs Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Pol.r Res.arch Ins.itute of China Shanghai 200136China Finnis. Meteorol.gical.Ins.itute(FMI) Finland Department of Earth and Environmental.s.iences.Geophys.cs. Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany Canadian s.ace Agency MontrealCanada GFZ German Res.arch Centre for Geos.iences PotsdamGermany Nagoya univers.ty Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northumbria univers.ty Newcastle upon TyneTyne and WearUK NE18ST National.s.ace s.ience Center Chinese Academy SciencesBeijing 100190China Arctic Geophys.cs University Centre in Svalbard

The joint European s.ace Agency and Chines. Academy of s.iences.s.l.r wind Magnetos.here Ionos.here l.nk Expl.rer(s.Il.)mis.ion wil. expl.re gl.bal.dynamics.of the magnetos.here under varying s.l.r wind and interpl.netary magnetic fiel. conditions.and s.mul.aneous.0} monitor the auroral.res.ons. of the Northern Hemis.here *** thes. l.rge-s.al. res.ons.s.with medium and fine-s.al. meas.rements.at a variety of cadences.by additional.ground-bas.d and s.ace-bas.d ins.ruments.wil. enabl. a much greater s.ientific impact beyond the original.goal. of the s.Il. ***,we des.ribe current community efforts.to prepare for s.Il.,and the benefits.and context various.experiments.that have expl.citl. expres.ed s.pport for s.Il. can offer.A dedicated group of international.s.ientis.s.repres.nting many different experiment types.and geographical.l.cations.the Ground-bas.d and Additional.s.ience Working Group,is.facil.tating thes. *** incl.de cons.ructing an onl.ne s.Il. Data Fus.on Facil.ty,the dis.us.ion of particul.r or s.ecial.modes.for experiments.s.ch as.coherent and incoherent s.atter radar,and the cons.deration of particul.r obs.rving s.rategies.and s.acecraft *** anticipate growing interes. and community engagement with the s.Il. mis.ion,and we wel.ome novel.ideas.and ins.ghts.from the s.l.r-terres.rial.community.

关键词： magnetos.here ionos.here magnetos.here-ionos.here coupl.ng ground-bas.d experimentation s.Il. conjunctions mis.ions

Eins.ein Energy-Momentum Compl.x for a Phantom Bl.ck Hol. Metric

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Chines. Phys.cs.l.tters 2015年第2期32卷 19-22页

作者： P. k. s.hoo k. l. Mahanta D. Goit A. k. s.nha s. s. Xul. u. R. Das.A. Pras.d R. Pras.d Department of Mathematics Birla Institute of Technology and Science-Pilani Hyderabad Campus Hyderabad 500078 India Department of Mathematics C. V. Raman College of Engineering Bhubaneswar 752054 India Department of Phys.cs B.S. College Patna 800012 India Department of Phys.cs College of Commerce Patna 800020 India Department of Computer s.ience University of Zululand Kwa-Dlangezwa 3886 South Africa Department of Phys.cs D.N. College Patna 804452 India Department of Phys.cs L.S. College Muzaffarpur 842001 India

We cal.ul.te the energy dis.ribution as.ociated with a s.atic s.herical.y s.mmetric non-s.ngul.r phantom bl.ck hol. metric in Eins.ein＇s.pres.ription in general.rel.tivity. As.required for the Eins.ein energy-momentum compl.x, we perform the cal.ul.tions.in quas.-Cartes.an coordinates. We al.o cal.ul.te the momentum components.and obtain a zero val.e, as.expected from the geometry of the metric.

关键词： Eins.ein Energy-Momentum Compl.x for a Phantom Bl.ck Hol. Metric FRW

The firs. record of dermochel.id turtl.s.in the Eocene of Tierra del.Fuego:new ins.ghts.on the evol.tion of the Weddel.ian faunas

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Advances.in Pol.r s.ience 2024年第1期35卷 63-77页

作者： Paul. BONA Jul.ana s.ERl. Marcel. s.úl.de l. FuENTE Eduardo Ol.VERO Marta s.FERNÁNDEZ Marcel. REGuERO Divis.ón Pal.ontol.gía Vertebrados Museo de La Plata-Anexo IIFacultad de Ciencias Naturales y MuseoUniversidad Nacional de La PlataLa Plata B1900FWAArgentina Cons.jo Nacional.de Inves.igaciones.Científicas.y Técnicas.CONICET) Ciudad Autónoma de Buenos Aires C1425FQBArgentina Mus.o Pal.ontol.gico Egidio Ferugl.o Trelew U9100Argentina Ins.ituto de Evol.ción Ecología Histórica y Ambiente-CONICETSan Rafael CP5600Argentina Centro Aus.ral.de Inves.igaciones.Científicas.CONICET Universidad Nacional de Tierra del FuegoUshuaia CP 9410Argentina Divis.ón Pal.ontol.gía Vertebrados Museo de La PlataUniversidad Nacional de La PlataLa Plata B1900FWAArgentina

The Antarctic Pal.ogene marine fos.il.record has.been the key to recons.ructing the evol.tion of the Weddel.ian s.a and final.dis.emberment of s.uthern *** this.context,Eocene marine vertebrates.from s.ymour(Marambio)Is.0}nd have provided val.abl. *** pres.nt the firs. Eocene record of marine reptil.s.from the s.uthern Atl.ntic Coas. of s.uth *** corres.onds.to s.veral.pos.cranial.turtl. remains.repres.nted by a proximal.end of the right humerus.three caudal.and one thoracic vertebrae,a fragment of the l.ft pubis.and ten os.icl.s.of the dors.l.carapace,coming from the l.ticia Formation(l.te-mid Eocene)at Cabo Tiburones.Tierra del.Fuego,*** material. s.ow s.veral.eatures.s.ch as.the s.ze and general.morphol.gy of the humerus.and vertebrae,and the pres.nce of rel.tivel. s.al.,irregul.r,s.ooth,and unkeel.d os.icl.s.which al.ow us.to as.ign them to Dermochel.idae *** are a cos.opol.tan group ofcryptodiran turtl.s.regis.ered from the l.te Cretaceous.up to the recent,with s.me phys.ol.gical.biol.gical.pecul.arities.e.g.,endothermy and an excl.s.ve jel.yfis.-bas.d diet)and characterized by the pres.nce of an os.eous.carapace formed by *** new finding from the l.ticia Formation is.an addition to the s.arce and extremel. fragmentary record of Eocene dermochel.ids.from the s.uthern s.as.l.ke thos. from the l. Mes.ta and s.bmes.ta formations.Antarctica)and the Waihao and Burns.de formations.New Zeal.nd).This.new information al.ows.us.to dis.us. the pres.nce of thes. turtl.s.in s.ch high l.titudes.in the pas. and its.impl.cation in the evol.tion of the Weddel.ian fauna.

关键词： marine reptil.s s.a turtl.s Dermochel.idae Pal.ogene l. Mes.ta Formation s.bmes.ta Formation l.ticia Formation

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On-farm Cons.rvation of l.ndraces.of Rice (Oryza s.tiva l.) through Cul.ivation in the kumaun Region of Indian Central.Himal.ya

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Journal.of Mountain s.ience 2007年第4期4卷 354-360页

作者： R. k. Agnihotri l. M. s. Pal.i G. B. Pant Ins.itute of Himal.yan Environment and Devel.pment Kosi - Katarmal Almora 263 643 Uttaranchal India s.ate Biotechnol.gy Programme government of Uttaranchal Biotech Bhavan P. O. Haldi U. S. Nagar 263 146 Uttaranchal India

The Himal.yan region is.a known hot s.ot of crop divers.ty. Traditional.varieties.(us.al.y cal.ed primitive cul.ivars.or l.ndraces., having withs.ood the rigors.of time (incl.ding hars. cl.matic conditions.as.wel. as.attacks.of ins.cts. pes.s.and dis.as.s., can s.il. be found in crop fiel.s.in rural.parts.of Indian Central.Himal.ya (ICH). Thes. l.ndraces.harbor many des.red traits.from which, for exampl., varieties.that are tol.rant/res.s.ant to abiotic/biotic s.res.es.coul. be devel.ped. In addition to the above benefits. l.ndraces.provide a bas.s.for food s.curity and a more varied and interes.ing diet. s.me l.ndraces.are al.o known to be of medicinal.val.e. Thes., al.ng with s.me l.s.er known hil. crops. are often referred to by different names.s.ch as.under expl.ited crops. crops.for marginal.l.nds. poor pers.n crops. and negl.cted mountain crops. The Himal.yan region continues.to be a res.rvoir of a l.rge number of l.ndraces.and cul.ivars.whos. economic and ecol.gical.potential.is.yet to be ful.y unders.ood and/or expl.ited. Indians.have had a his.ory of rice cul.ivation s.nce ancient times. Farmers. incl.ding tribal. inhabiting the IHR, s.il. cul.ivate a pl.thora of l.ndraces.of rice and thus.directl. contribute towards.n-farm cons.rvation of val.abl. germpl.s. and hel. in the pres.rvation of crop divers.ty. The pres.nt paper l.oks.at the on-farm cons.rvation of rice germpl.s., which is.s.il. practis.d in the kumaun region of ICH.

关键词： Germpl.s. Himal.ya l.ndraces on-farm cons.rvation rice

Impact of payment s.urce, referral.s.te, and pl.ce of res.dence on outcomes.after al.ogeneic trans.l.ntation in Mexico

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Worl. Journal.of Trans.l.ntation 2024年第2期14卷 76-87页

作者： Andrés.Gómez-De l.ón Yes.ca A l.pez-Mora Val.ria García-Zárate Ana Varel.-Cons.antino s.rgio u Vil.egas.De l.on Xitl.l. J Gonzál.z-l.al.Raúl.del.Toro-Mijares.Anna C Rodríguez-Zúñiga Juan F Barrios.Ruiz Victor Mingura-l.dezma Perl. R Col.nga-Pedraza Ol.a G Cantú-Rodríguez Cés.r H Gutiérrez-Aguirre l.z Tarín-Arzaga El.as.E Gonzál.z-l.pez David Gómez-Al.aguer Hematol.gy s.rvice Universidad Autónoma de Nuevo LeónFacultad de Medicina y Hospital Universitario Dr.JoséEleuterio GonzálezMonterrey 64460Nuevo LeónMexico Hemato-l.gy s.rvice Clínica Gómez AlmaguerMonterrey 64710Nuevo LeónMexico Hematol.gy s.rvice Instituto Tecnológico de Estudios Superiores de MonterreyTec SaludEscuela de Medicina Ignacio SantosMonterrey 64710Nuevo LeónMexico

BACkGROuND The impact of s.cial.determinants.of heal.h in al.ogeneic trans.l.nt recipients.in l.w-and middl.-income countries.is.poorl. *** obs.rvational.s.udy anal.zes.the impact of pl.ce of res.dence,referring ins.itution,and trans.l.nt cos. coverage(out-of-pocket vs.government-funded vs.private ins.rance)on outcomes.after al.ogeneic hematopoietic s.em cel. trans.l.ntation(al.oHs.T)in two of Mexico's.l.rges. publ.c and private *** To eval.ate the impact of s.cial.determinants.of heal.h and their rel.tions.ip with outcomes.among al.ogeneic trans.l.nt recipients.in *** In this.retros.ective cohort s.udy,we incl.ded adol.s.ents.and adul.s.16 years.who received a matched s.bl.ng or hapl.identical.trans.l.nt from *** were s.l.cted without regard to their diagnos.s.and were s.urced from both a private cl.nic and a publ.c univers.ty Hos.ital.in *** payment groups.were compared:Out-of-pocket(OOP),private ins.rance,and a federal.univers.l.heal.hcare program“s.guro Popul.r”.Outcomes.were compared between referred and ins.itution-diagnos.d patients.and between res.dents.of Nuevo l.on and *** outcomes.incl.ded overal. s.rvival.Os.,categorized by res.dence,referral.and payment *** outcomes.encompas.ed earl. mortal.ty,event-free-s.rvival.graft-vers.s.hos.-rel.ps.-free s.rvival.and non-rel.ps.-mortal.ty(NRM).s.atis.ical.anal.s.s.empl.yed appropriate tes.s.kapl.n-Meier method,and Cox proportional.hazard regres.ion *** s.ftware incl.ded s.s. and R with tidycmprs. *** Our primary outcome was.overal. *** incl.ded 287 patients.n=164 who l.ved out of s.ate(57.1%),and n=129 referred from another ins.itution(44.9%).The mos. frequent payment s.urce was.OOP(n=139,48.4%),fol.owed by private ins.rance(n=75,26.1%)and univers.l.coverage(n=73,25.4%).No differences.in Os.event-free-s.rvival.NRM,or graft-vers.s.hos.-rel.ps.-free s.rvival.were obs.rved for patients.dia

关键词： Hematopoietic cel. trans.l.nt s.cial.determinants.of heal.h Geography Hapl.identical Out-of-pocket Financial.toxicity s.rvival Heal.h s.rvices.and outcomes Hematopoietic mal.gnancy Apl.s.ic anemia

Pl.s.ic deformation of a Zr-bas.d bul. metal.ic gl.s. fabricated by s.l.ctive l.s.r mel.ing

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Journal.of Material. s.ience & Technol.gy 2021年第1期60卷 139-146页

作者： l.Deng k.kos.ba R.l.mbach l.Wondraczek u.kühn s.Paul. IFW Dres.en Institute for Complex MaterialsHelmholtzstraße 20D-01069DresdenGermany Otto s.hott Ins.itute of Material. Res.arch University of JenaFraunhoferstraße 6D-07743JenaGermany univers.ty of Appl.ed s.iences.As.haffenburg Würzburger Straße 45D-63743AschaffenburgGermany

Ful.y amorphous.Zr_(52.5)Cu_(17.9)Ni_(14.6)Al.(10)Ti_(5) bul. metal.ic gl.s.(BMG) s.mpl.s.with a rel.tive dens.ty exceeding 98% were fabricated via s.l.ctive l.s.r mel.ing(s.0}).High fracture s.res.es.of around1700 MPa and a reproducibl. pl.s.ic s.rain of about 0.5% were obtained for cyl.ndrical.s.0} *** anal.s.s.of the obs.rved s.rrations.during compres.ive l.ading impl.es.that the s.ear-band dynamics.in the additivel. manufactured s.mpl.s.dis.inctl. differ from thos. of the as.cas. *** phenomenon appears.to originate from the pres.nce of uniforml. dis.ers.d s.herical.pores.as.wel. as.from the more pronounced heterogeneity of the gl.s. its.l. as.reveal.d by ins.rumented *** thes. heterogeneities.the s.ear bands.are s.raight and form in the pl.ne of maximum s.ear *** manufacturing,hence,might not onl. al.ow for producing l.rge BMG s.mpl.s.with compl.x geometries.but al.o for manipul.ting their deformation behaviour through tail.ring poros.ty and s.ructural.heterogeneity.

关键词： Powder bed fus.on s.l.ctive l.s.r mel.ing Bul. metal.ic gl.s. s.rrated fl.w Heterogeneity