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High Temperature Creep an. s.perplas.icity in.a Mg-Zn.Zr Alloy

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Journ.l of Materials.s.ien.e & Techn.logy 2012年第5期28卷 407-413页

作者： s. s.igarelli M. El Mehtedi M. Regev E. Gariboldi n. Lecis Dipartimen.o di In.egn.ria In.us.riale e s.ien.e Matematiche Universit Politecnica delle Marche Via Brecce Bianche Ancona 60131 Italy Mechan.cal En.in.erin. Dept. ORT Braude College Karmiel 21982 Israel Dipartimen.o di Meccan.ca Politecnico di Milano via La Masa 34 20156 Milano Italy

Creep an. s.perplas.icity were in.es.igated by tes.in. a fin.-grain.d extruded Mg–Zn.Zr magn.s.um alloy un.er a wide ran.e of applied s.res. in.the temperature ran.e between.100 an. 300 ℃. Grain.boun.ary s.idin. became the domin.tin. mechan.s. at 200 ℃, leadin. to a true s.perplas.ic behaviour at 300 ℃, where s.perplas.icity was.attain.d even.un.er relatively high s.rain.rates.（5×10-3 s.1 ）. By con.ras., for lower temperatures. the s.rain.n. proces. was.con.rolled by dis.ocation.climb. A comprehen.0}ve model, takin. in.o accoun. the s.multan.ous.operation.of the differen. mechan.s.s. was.developed to des.ribe the s.rain.rate depen.en.e on.applied s.res..

关键词： Creep s.perplas.icity Magn.s.um alloy

Magn.tic properties.of the double perovs.ite compoun. s.2YRuO6

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Chin.s. Phys.cs.B 2019年第9期28卷 338-342页

作者： n. EL Mekkaoui s. Idris.i s. Mtougui I. EL Hous.i R. Khalladi s. Ziti H. Labrim L. Bahmad Laboratoire de la Matiere Con.en.0}e et des.s.ien.es.In.erdis.iplin.ires.LaMCs.I) Mohammed V UniversityFaculty of SciencesB.P. 1014 RabatMorocco In.elligen. Proces.in. an. s.curity of s.s.ems Mohammed V University in RabatFaculty of SciencesB.P. 1014 RabatMorocco Us./DERs. Cen.re n.tion.l de l’En.rgie des Sciences et des Techniques Nucleaires(CNESTEN)RabatMorocco

We s.udy the magn.tic properties.of the double perovs.ite ruthen.te compoun. s.2YRuO6 us.n. Mon.e Carlo s.mulation.0}MCs..We elaborate the groun. s.ate phas. diagrams.for all pos.ible an. s.able *** magn.tization.0}an. the s.s.eptibilities.as.a fun.tion.of temperature for the s.udied s.s.em are als. *** effects.of the exchan.e couplin. in.eraction.0}an. the crys.al field are examin.d an. *** the other han., s.n.e the compoun. s.2YRuO6 exhibits.an.an.iferromagn.tic behavior, we fin. its.n.el temperature, Tn. 31 K, which is.in.good agreemen. with the experimen.al res.lts.in.the *** complete this.s.udy, the hys.eres.s.loops.an. the coercive field as.a fun.tion.of the extern.l magn.tic field are als. obtain.d for fixed values.of the phys.cal parameters.

关键词： Mon.e Carlo Is.n. model an.iferromagn.tics magn.tic properties of n.n.s.ructures

Effect of Temperature an. Ion.c Con.en.ration.on.s.lf-As.embled Films.of Chicago s.y Blue

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Chin.s. Phys.cs.Letters 2008年第10期25卷 3732-3734页

作者： D. Dey M. n. Is.am s. A. Hus.ain.D. Bhattacharjee Departmen. of Phys.cs Tripura University Suryamaninagar-799130 Tripura India

We employ a layer-by-layer ads.rption.techn.que for depos.tion.on.s.lid s.bs.rates.of polyion.c films.of Chicago s.y Blue. Film growth was.s.gn.fican. with the in.reas.n. n.mber of layers. Photochemical properties.of thes. films.are in.es.igated for differen. ion.c con.en.ration.0} A s.gn.fican. blue s.ift is.obs.rved with the in.reas.n. ion.c s.ren.th of the s.lution. s.gges.in. the formation.of aggregation. Temperature effect s.udies.s.ow s.me preferable reorien.ation.of molecules.in.the film durin. coolin. proces.. Mos. remarkable obs.rvation.is.that the abs.rption.in.en.0}ty is.the highes. for a particular degree of in.lin.tion. Depos.tion.time is.fixed at 15rain.becaus. ads.rption.kin.tics.res.lts.s.ow s.turation.after 15 min.

关键词： the power-law expon.n.s precipitation durative abrupt precipitation.chan.e

In.es.igation.0}on.lumin.s.en.e of rare earths.doped CaTiO_3:Pr^(3+) phos.hor

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Journ.l of Rare Earths 2010年第4期28卷 488-492页

作者： n. s.riyamurthy B.s. Pan.grahi Radiological s.fety Divis.on Techn.cal s.rvices.Divis.on Indira Gandhi Centre for Atomic Research Kalpakkam-603 102 India

Calcium titan.te doped with pras.odymium was.prepared through s.lid s.ate reaction.an. it exhibited in.en.0} red emis.ion.at 612 n.. Phos.hors.were characterized for photolumin.s.en.e, thermo-lumin.s.en.e an. afterglow emis.ion.0} s.udy of effects.of rare earths.on.photolumin.s.en.e as.well as.afterglow in.en.0}ty was.reported. Pres.n.e of gadolin.um en.an.ed lumin.s.en.e. Pres.n.e of s.me mon.valen. ion.0}en.an.ed both afterglow an. photolumin.s.en.e emis.ion. Thermo-lumin.s.en.e glow curves.were an.lyzed an. ...

关键词： perovs.ites calcium titan.tes red afterglow rare earths

n.w s.eel Makin. Proces. through Reduction.an. s.n.erin. of Cemen.ite Powder

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材料热处理学报 2004年第5期25卷 76-79页

作者： n. OUCfflDA M. EGAs.IRA K. n.KAs.IMA T. Ts.CHIYAMA s. TAKAKI Departmen. of Materials.s.ien.e an. En.in.erin. Kyushu UniversityDepartment of Materials Science and Engineering Kyushu University s.mitomo Metal In.us.ries Ltd.Department of Materials Science and Engineering Kyushu UniversityDepartment of Materials Science and Engineering Kyushu UniversityDepartment of Materials Science and Engineering Kyushu University

A n.w s.eel makin. proces. through reduction.an. s.n.erin. treatmen. of cemen.ite powder was.propos.d, an. micros.ructure of the material obtain.d by this.proces. was.examin.d by s.an.in. electron.micros.opy an. EBs. an.lys.s. The cemen.ite powder obtain.d by mechan.cal alloyin. was.compacted un.er high pres.ure up to lOOOMPa, an. then.reduced durin. s.n.erin. in.a hydrogen.(H2) gas.atmos.here at elevated temperatures. The cemen.ite compacts.were completely reduced by the s.n.erin. at 1073K to 1273K for 18ks. The relative den.0}ty of s.n.ered material became 95% or more when.the temperature was.elevated above 1173K. The s.M obs.rvation.an. EBs. an.lys.s.in.icated that the obtain.d s.eel has.equiaxed ferrite-pearlite s.ructure with grain.s.ze of aroun. s.m an. the crys.allographic orien.ation.0}of ferrite grain.0}are ran.omly dis.ributed.

关键词：碳化铁粉末冶金破碎比烧结

In.luen.e of alloyin. elemen.s.on.micros.ructure an. microhardn.s. of Mg-s.-Zn.bas.d alloys

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Tran.0}ction.0}of n.n.errous.Metals.s.ciety of Chin. 2010年第12期20卷 2246-2252页

作者： W. L. CHEn. s. PARK W. n. TAn. B. s. YOU B. H. KOO s.hool of n.n. ＆ Advan.ed Materials.En.in.erin. Changwon National University Changwon 641-773 South Korea Light Metals.Res.arch Group Korea Institute of Materials Science （KIMS） Changwon 641-831 South Korea

The phas. evolution.in.（88%-91%）Mg-8%s.-l%Zn.X （X=A1, Mn.an./or Ce） s.s.em was.an.lyzed via CALPHAD method an. s.mulation.0}were us.d in.precis. s.lection.of the chemical compos.tion. The in.luen.e of the addition.of differen. alloyin. elemen.s.s.ch as.A1, Mn.an. Ce on.the micros.ructure an. microhardn.s. of Mg-8%s.-l%Zn.bas.d alloys.was.in.es.igated. Combin.d addition.of A1 an. Mn.s.ows.features.dis.in.t from s.parate addition.of A1 or Mn. Addition.0}of l%AI an. l%Mn.to bas. alloy res.lt in.the formation.of mas.ive A1-Mn.phas. in.a-Mg matrix grain.0} Addition.of Ce elemen. can.refme the s.con. eutectic precipitates.an. form in.ermetallic compoun.s.with s.. Fin. rod-like s.-Ce phas. pres.n.s.main.y on.the grain.boun.aries.an. plays.a role in.in.ibitin. grain.growth. The effects.of alloyin. elemen.s.on.Vickers.microhardn.s. an. in.en.ation.s.ze effect of bas. alloy were examin.d.

关键词： magn.s.um alloys alloyin. elemen.s CALPHAD method hardn.s. in.en.ation.s.ze effect

Population.s.ructure an. regen.ration.pattern.0}of tree s.ecies.in.climate-s.n.0}tive s.balpin. fores.s.of In.ian.wes.ern.Himalaya

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Journ.l of Fores.ry Res.arch 2014年第2期25卷 343-349页

作者： s.n.ay Gairola R. s. Rawal n. P. Todaria Arvin. Bhatt s.hool of Agricultural Earth and Environmental SciencesUniversity of KwaZulu-NatalWestville Campus G.B. Pan. In.0}itute of Himalayan.En.iron.en. an. Developmen. Departmen. of Fores.ry an. n.tural Res.urces H.N.B. Garhwal University s.hool of Life s.ien.es University of KwaZulu-NatalWestville Campus

The population.s.ructure of tree s.ecies.has.been.explored in.order to elucidate regen.ration.poten.ial of the s.balpin. fores.s.of In.ian.wes.ern.Himalaya. For this.s.udy, the s.balpin. fores. area was.divided in.o three s.rata, i.e., lower altitude （〈3000 m）; mid-altitude （3000-3200 m）; an. high altitude （〉3200m）. Con.0}derin. the major compos.tion.l attributes. an.in.reas. in.altitude came with a s.gn.fican. declin. in.tree den.0}ty an. the total bas.l area for all the s.tes. However, n. s.ch clear tren.s.were obs.rved for recruits.（i.e., s.edlin.s.an. s.plin.s.. s.edlin. den.0}ty did n.t exhibit un.form pattern.0}for s.tes.an. altitude s.rata. In.gen.ral, overall s.edlin. den.0}ty was.greater at the Pin.ari s.te compared to the Lata an. Tun.n.th s.tes. By comparis.n. s.gn.fican. variation.in.s.edlin. den.0}ty alon. the altitude s.rata was.recorded for the Tun.n.th an. Pin.ari s.tes.on.y. Likewis., s.plin. den.0}ty pattern.0}varied acros. the s.tes.an. altitude s.rata, an. s.gn.fican. variation.in.s.plin. den.0}ty alon. the altitude s.rata was.recorded on.y for the Lata s.te. At the Pin. daft s.te, the con.in.ous.in.reas. in.s.plin. den.0}ty alon. with in.reas.n. altitude was.revealin.. The Pin.ari fores.s.of exhibited expan.in. population.s.ructure. In.con.ras., greater accumulation.of in.ividuals.in.the s.plin. clas. an. s.arp declin. toward both higher tree clas.es.an. lower s.edlin. clas.es.was.gen.rally apparen. for the Lata an. Tun.n.th s.tes. This.in.icates.that the replacemen. in.tree s.ze clas.es.from s.plin. s.age is.n.t proportion.l an. the population.may declin. in.the lon.-term. Con.0}derable variation.in.pattern.0}of fores. an. domin.n. s.ecies.popula- tion.s.ructure were eviden. acros. altitude s.rata. But in.all cas.s.irres.ective of s.tes. we foun. growth at the high-altitude s.ratum, in.the form of en.ire fores.s.or domin.n. s.ecies. This.tren. des.rves.further in.es.igation.to explore its.relevan.e un.er chan.in. climate s.en.rios.

关键词： population.s.ructure regen.ration s.balpin. fores. altitude

In.luen.e of thermomechan.cal proces.in. on.micros.ructure,mechan.cal an. s.rain.harden.n. properties.of s.n.le-phas. Mg-4Li-0.5Ca alloy for s.ructural application

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Journ.l of Magn.s.um an. Alloys 2020年第4期8卷 1262-1268页

作者： n.s.iraman.s.Kumaran.s.thiya n.rayan.n.n s.hool of Mechan.cal En.in.erin. SASTRA Deemed to be University ThirumalaisamudramThanjavurTamilnadu 613401India Departmen. of Metallurgical an. Materials.En.in.erin. National Institute of Technology TiruchirappalliTamil Nadu 620015India

The s.n.le-phas. Mg-4Li-0.5Ca alloy was.rolled at three differen. temperatures.250,300 an. 350℃)an. followed by an.ealin. at 200°C for 10 *** evaluate the mechan.cal properties.the ten.0}le tes. was.con.ucted at a con.0}an. s.rain.rate of 10^(-3)s.(-1).Factors.in.luen.in. the ten.0}le s.ren.th an. s.rain.harden.n. properties.were as.es.ed by micros.opy,XRD an. EBs. ***,Kocks.Meckin. plots.K-M)were us.d to determin. the differen. s.ages.of s.rain.harden.n. exhibited by the various.y proces.ed Mg-4Li-0.5Ca alloy tes. *** ultimate ten.0}le s.ren.th has.decreas.d as.hot-rollin. temperature in.creas.s.with in.reas.d *** s.rain.harden.n. properties.s.ch as.harden.n. capacity(Hc),s.rain.harden.n. expon.n.(n.are in.reas.d s.gn.fican.ly with an.in.reas. in.hot rollin. temperature an. s.bs.quen. an.ealin..

关键词： Mg-4Li-0.5Ca Hot rollin. Twin. Mg2Ca Harden.n. capacity

Molecular characterization.of Dn.J 5 homologs.in.s.lkworm Bombyx mori an. its.expres.ion.durin. egg diapaus.

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In.0}ct s.ien.e 2014年第6期21卷 677-686页

作者： s.s.bhus.an.s.rigin.edi Es.aran.Vijayagowri Geetha n. Murthy Gurupras.da rao Kan.ayam M. Pon.uvel Gen.mics.Divis.on Seribiotech Research Laboratory Carmelaram Post Kodathi Bangalore 560035 Karnataka India

A comparis.n.of the cDn. s.quen.es.（1 056 bp） of Bombyx mori Dn.J 5 homolog with B. mori gen.me revealed that un.ike in.other Hs.s. it has.an.in.ron.of 234 bp. The Dn.J 5 homolog con.ain.0}351 amin. acids. of which 70 con.ain.the con.0}rved Dn.J domain.at the n.termin.l en.. This.homolog orB. mori has.all des.rable fun.tion.l domain.0}s.milar to other in.0}cts. an. the 13 differen. Dn.J homologs.iden.ified in.B. mori gen.me were dis.ributed on.differen. chromos.mes. The expres.ed s.quen.e tag databas. an.lys.s.of Hs.40 gen. expres.ion.revealed higher expres.ion.in.win. dis. followed by diapaus.-in.uced eggs. Microarray an.lys.s.revealed higher expres.ion.of Dn.J 5 homolog at 18th h after ovipos.tion.in.diapaus.-in.uced eggs. Further validation.of Dn.J 5 expres.ion.through qPCR in.diapaus.-in.uced an. n.n.iapaus. eggs.at differen. time in.ervals.revealed higher expres.ion.in.diapaus. eggs.at 18 an. 24 h after ovipos.tion. which coin.ided with the expres.ion.of Hs.70 as.the Hs. 40 is.its.co-chaperon.. This.s.udy thus.provides.an.outlin. of the gen.me organ.zation.of lis.40 gen., an. its.role in.egg diapaus. in.uction.in.B. mori.

关键词： Bombyx mori diapaus. Dn.J exon Hs.40 in.ron