简介：用硝酸盐先锋，为做钕的钇铝石榴石(钇铝柘榴石)的准备的一个新奇弄干水花的帮助柠檬酸盐胶化过程阶段被开发。单相的多晶的钇铝柘榴石的合成在象800一样低的温度被完成

简介：Nd:钇铝柘榴石先锋粉末被同类的降水，和Nd综合:钇铝柘榴石透明陶艺被真空sintering为5h在1700°C作好准备。陶器的材料被轻发射度和地排放枪环境扫描显微镜描绘。用统计和立方米科学理论，学习在在轻发射度和立体声之间的量的关系上被执行在三维的欧几里德几何学的空格的逻辑参数。这被发现Nd的发射度:有在厚度的1公里的钇铝柘榴石分别地在可见、在红外线附近的波长是大约45%和58%。发射度线性地与增加相等的范围直径增加并且当相等的范围直径是20μm时，到达单个水晶的理论价值。有每统一谷物和分离谷物的体积增加吝啬的特定的区域的发射度减少，和有增加的发射度减少在Nd意味着谷物的免费距离:钇铝柘榴石陶艺。

简介：Magneto-opticFaradayrotationeffectandtheamountofbismuthsubstitutedinyttriumirongarnetsinglecrystalfilmspreparedbygel-coatingonmodifiedgadolinium-galliumgarnetsubstratesareinvestigated,wherethegelissynthesizedbyasol-gelreactionofnitratesandethyleneglycol.Thecoatedgelisannealedinairattemperaturesupto660℃for4h,whichisabout300℃lowerthanthatofliquid-phaseepitaxy.ThemaximumamountofBisubstitutionisx=2.7andthecrystallizationtemperatureofgarnetphasedecreaseswiththeincreaseofxdownto520℃forx=2.7.Inthisfilm,ahugeFaradayrotationof-8.1×104(°)/cmatλ=0.633μmisobtained.

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简介：ThearealdistributionofsomeelementsintherareearthbearingspheroidalphasesinpurealuminiumandAl-MnalloyswasstudiedbySIMS(secondaryionmassspectrometry).Theresultsshowthatcerium,iron.siliconandhydrogenaresignificantlysegregatedinthephases.Thustheexistenceofhydrogen-richrareearthbearingeompoundsisconfirmed.Itindicatesthattherareearthshaveahydrogenfixationeffectinaluminiumandaluminiumalloys.

简介：TheRamanspectraofthenaturalendmembersofthegarnet-groupminerals,whichincludepyrope,almandineandspessariteofFe-Algarnetseriesandgrossularite,andraditeanduvaroviteofCa-Fegarnetseries,havebeenstrdied.MeasuredRamanspectraofthesemineralsarereasonablyandqualitativelyassignedtotheinternalmodes,translationalandrotatorymodesofSiO4tetrahedra,aswellasthetranslationalmotionofbivalentcationsintheXsite.ThestretchandrotatoryA1gmodesfortheFe-AlgarnetseriesshowobviousRamanshiftsascomparedwiththosefortheCa-Fegarnetseries,owingtothecationsresidingintheXsiteconnectedwithSiO4tetrahedrabysharingthetwoedges.TheRamanshiftsofallmemberswithineitheroftheseriesareattributedmainlytothepropertiesofcationsintheXsitefortheFe-AlgarnetseriesandintheYsitefortheCa-Fegarnetseries.

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简介：Thispaperdiscussesthemicrostructureofnickel-aluminiumbronzescon-taining（9-10）wt%Aland（0.1～5）wt%Ni,inwhichthreeeutectoidsmayexist.Themorphologiesofα+γ2andα+β’2aresimilarbutthelatterisfiner.Intheα+β’2+γ2eutectoidstructureβ’2ismainlyconcentratedattheα/βboundaries,whileγ2isdistrib-utedinsidepriorBregions.BothK-SandN-Worientationrelationshipsexistbetweenαandβ’2（orγ2）inalloysconsistingofα+β’2orα+γ2.However,ifthealloyconsistsofα+β’2+γ2eutectoid,thelatticesofβ’2andγ2areparallel,bothofthemhavetheN-Worientationrelationshipwithα.

简介：ＣａｔａｌｙｔｉｃＤｅｃｈｌｏｒｉｎａｔｉｏｎｏｆＰｏｌｙｃｙｃｌｉｃＣｈｌｏｒｏａｒｏｍａｔｉｃｓｗｉｔｈＤｉｃｙｃｌｏｐｅｎｔａｄｉｅｎｙｌＹｔｔｒｉｕｍＣｈｌｏｒｉｄｅⅡＣａｔａｌｙｔｉｃＤｅｃｈｌｏｒｉｎａｔｉｏｎｏｆＰｏｌｙｃｙｃｌｉｃＣｈ...

简介：ＩｎｔｒｏｄｕｃｔｉｏｎＩＭＩ８２９ｔｉｔａｎｉｕｍａｌｏｙｉｓａｋｉｎｄｏｆｈｉｇｈｔｅｍｐｅｒａｔｕｒｅｎｅａｒαａｌｏｙ．Ｉｔｓｓｅｒｖｉｃｅｔｅｍｐｅｒａｔｕｒｅｉｓｕｐｔｏ５８０℃．ＩｔｈａｓｂｅｅｎｕｓｅｄｉｎＲＢ２１１５２５Ｅ４ｅｎ...

简介：Yttriumoxidenanopowderwaspreparedbyanoveltechniqueusinganalginatebiopolymerasaprecursor.Thetechniqueisbasedonthermaldecompositionofanyttriumalginategel,whichisproducedintheformofbeadsbyionicgelationbetweentheyttriumsolutionandsodiumalginate.Theeffectofpost-annealingtemperatureontheparticlesizeofthenanocrystalswasinvestigatedatvarioustemperatures.TheproductswerecharacterizedusingX-raydiffraction,scanningelectronmicroscopy,andatomicforcemicroscopy.ThesizeofthenanocrystallineY2O3particlesvariedfrom22.7to38.7nm,dependingontheannealingtemperatureandtime.Thegrainsizedistribution（GSD）wasalsodetermined.TheGSDbecamemorenon-symmetricalastheannealingtemperatureincreased,andthewidthofthedistributionsforthepowdersproducedusingthealginatemethodwaslessaffectedbyheattreatment.Thisalginatemethodwascomparedwiththeconventionalglycinecombustionmethod,onthebasisofparticlesize.Theparticlesobtainedusingtheproposedtechniqueweresmallerthanthoseobtainedusingthecombustionmethod.Alginate-assistedthermaldecompositionisthereforeaneasyandcost-effectivemethodforpreparingnanosizedY2O3crystals.

简介：惰性的金属炸药，炸药的一种新类型，是高爆炸、惰性的金属粒子的混合物。当这种炸药被触发时，惰性的金属粒子流动将被开车的爆炸产品形成。为了决定金属粒子的运动的特征，流动，一系列铝盘子被设计是金属粒子流动影响了的目标。测试结果被介绍，一个数字模型被设置分析高速度的影响铝板上的惰性的金属粒子。基于数字分析，在目标板和惰性的金属粒子的起始的条件上的标记的特征之间的关系被建议。从目标盘子上的影响的分析，金属粒子的运动的更多的信息能被重建。

简介：ＰｒｏｃｅｓｓＤｅｖｅｌｏｐｍｅｎｔＡｓｐｅｃｔｓｏｆＡｌｕｍｉｎｉｕｍ－ＴｉｔａｎｉｕｍＭａｓｔｅｒＡｌｉｏｙｓＫｒｉｓｈｎａｎＴ．Ｓ．；ＲａｊａｇｏｐａｌａｎＰ．Ｋ；ａｎｄＢｏｓｅＤ－Ｋ．（Ｍｅｔａｌｌｕｒｇｙ．Ｄｉｖｉｓｉｏｎ，ＢｈａｂｈａＡｔ...

简介：Thereductionofcarbon/aluminapowdermixtureinaflowingnitrogenstreamwasinve-tigatedbythequantitiativeanalysisofX-raydiffraction.Experimentalresultsindicatedthatthereactionratecouldbeincreasedbyincreasingthenitrogenflowrate,ortreatingtemperature,Theratewasalsofoundtobeincreasedbydecreasingthealuminaparticlesizeandinitialbulkdensity,Andthecalcinedaluminawassup-posedtobethesuitablesourceofaluminumox-idecomparedwiththeothertypesofalumina.ThefinalpowderproductofAlNwasobservedbySEMandanalyzedbyaprticle-sizeanalyzer.

简介：Thephenomenonofearingisinvestigatedinthepresentstudybasedonthetheoryofcrystalplasticitywiththedynamicexplicitfiniteelementprogramdeveloped.FirstlytextureanalysisiscarriedoutofrolledaluminiumalloyA15052bymeansofX-raytechnique.Thenfromthetexturecoefficientsananalyticalexpressionfortheorientationdistributionfunction(ODF)isderivedmakinguseofthecomputeralgebraiclanguageMathematica4.0,whichmakesiteasiertodiscretizetheODFintoaseriesofEuleriananglesrepresentingthedistributionoflatticesandfurtherthepreferredorientation(texture)ofcrystalsoftheoriginalsheets.Forthepolycrystalmodel,thematerialisdescribedusingcrystalplasticitywhereeachmaterialpointinthesheetisassumedtobeapolycrystallineaggregateofaverylargenumberofface-centeredcubic(FCC)grainswitheachgrainmodelledasanFCCcrystalwith12distinctslipsystems.ThemodifiedTaylortheoryofcrystalplasticityisusedandonlytheinitialtextureistakenintoconsiderationduringlargeplasticdeformation.Numericalsimulationofearinghasbeenperformedforanaluminiumsheetwithtextureandonewithcrystalsexhibitingrandomdistributiontodemonstratetheeffectoftextureofmaterialsontheirplasticanisotropyandformability.

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简介：AgarnetlherzolitexenolithhostedinolivinenephelinitefromXilong,ZhejiangProvince,southeasternChina,showsclearevidenceofmodalmetasomatisminvolvingaspecialsanidine-olivine-diopside(SOD)associationwhichwasproducedbyreplacementofprimaryorthopyroxene.Thefluidresponsibleforthemeasomatismwasasilica-undersaturatedvapour,richinK,Ba,SrandTi.ItissuggestedthattheSODassemblageistheproductofmetasomatismofadepletedlherzoliteprecursor,andformedintheuppermantlepriortoentrainmentanderuption.

简介：TheeffectofrareearthelementyttriumonthehightemperatureoxidationresistanceofadirectionallysolidifiedNi-basesuperalloywasstudiedwithscanningelectronmicroscopy(SEM),energydispersivespectrum(EDS)andX-raydiffraction(XRD)techniques.Theresultsshowthattheoxidationresistanceofthealloyissubstantiallyimprovedbyaddingproperamountofyttrium.