简介：

简介：

简介：结果证明Mg在空间在钢的张力的性质和坚硬上有更少的效果温度，而是Mg的正确数量改进影响和破裂坚韧并且减少破裂转变温度更加由于包括修正，象一样通过加强谷物边界并且修改边界碳化物戏剧性地延长槽口压力破裂生活。有一个最佳Mg内容，它在试验性的35CrNi3MoV钢是大约0.0030%。(编辑作者摘要)8个裁判员。

简介：作为硬盘摄像机市场的领头羊，JVC推出的最新款机型正如我们所预期的一样小巧，易于操作，还配备了32倍光学变焦镜头，但它的毛病也不少。

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简介：Sodiumparanitrophenolatedihydrate(NPNa·2H2O)isanexcellentsemiorganicnonlinearoptical(NLO)material,crystallizesbothinwaterandmethanolwithhighdegreeoftransparency.Goodopticalqualitysinglecrystalsofdimensionupto18mmx6mmx3mmareobtainedbyisothermalsolventevaporationtechnique.Thesolubilityofthecrystalindifferentsolventswasmeasuredgravimetrically.ThesinglecrystalsofNPNa·2H2Oshowvariationinphysicalpropertiesandgrowthrateindifferentsolvents.Methanolorethanolsolutionyieldscrystalsofbipyramidalshapewithclearmorphology.However,methanolgrowncrystalisexhibitingimprovedhardnessparametersandpossessesexcellentthermalstabilityascomparedtowatergrowncrystals.TheeffectsofsolventonhardnessparameteralongwiththermalandopticalpropertiesofNPNa·2H2Owasrevealedinthispaper.

简介：Energy-storageweldingconnectioncharacteristicsofrapidlysolidifiedAZ91DMgalloyribbonswith40～70μmthicknessareinvestigatedusingamicrotypeenergy-storageweldingmachine.Themicrostructureandperformanceoftheconnectionjointsareanalyzedandstudied.Theresearchresultsindicatethatenergy-storageweldingisabletorealizethespotweldingconnectionofAZ9lDMgalloyribbons.Theweldingnuggetconsistsofdevelopedα-Mgequiaxedgrainswiththesizesof1.2～2.7μmandintergranulardistributedβ-Mg17Al12compounds.Thethicknessofbondzoneisabout4μmandthesolidificationmicrostructureischaracterizedbythefineequiaxedgrainswiththesizesof0.8～1.2μm,andgrainboundaryhasbecomecoarsening.ThecolumnarcrystalinHAZalsobecomesslightlycoarseningandthegrainboundaryhasbroadened,however,thereisnoobviouschangeinitsprimitivemorphologyandcrystallographicdirection.Whenweldingenergyisabout2.0J,theweldingjointswithhighershearstrengthandsmallerelectricalresistivityareobtained.

简介：~~《热贡6月会》@姜丽彬

简介：铈磷酸盐粉末被二氧化铈和磷酸盐酸的直接稳固的液体反应在Ce综合：1:1的P比率。阶段纯并且细粒尺寸CePO_4powers能被锻烧获得是比600degC高在温度收到了粉末。它是表明的thaiCePO_4粉末的粒积和形态学在各种各样的温度被锻烧。有趣的分层的晶体结构和在CePO_4内在渗出的表面上沿着挤压应力方向交叉并且发生的一系列微裂缝被观察。CePO_4的韧性和machinabililty陶器被归因于分层的结构。连续用机器制造碎片在转的表面上被观察。

简介：TiB2ceramicspowderwassynthesizedfromB2O3-TiO2-Mgsystem.TheeffectsofTiB2additionasdiluentonthecombustionsynthesisprocesswereinvestigated.TheresultsofthermodynamiccalculationandexperimentsshowthattheincreaseofTiB2contentrangingfrom0to20wt%canreducetheadiabatictemperatureTadfrom3100Kto2896KandcombustiontemperatureTcfrom2139Kto1621Krespectively.TheparticlesizeandhalfwidthoftheparticledistributionarealsoincreasedwiththeadditionofTiB2increasingfrom0to20wt%.ThecombustionproductisamixtureofTiB2,MgO,andotherintermediatephases.TheleachedproductcontainsmainlyTiB2,TiO2andTiN,anditsoxygencontentis7.77wt%.

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简介：

简介：Anitrate-citratecombustionroutetosynthesizeLa0.9Sr0.1Ga0.8Mg0.2O3-δpowderforsolidoxidefuelcellapplicationwaspresented.Thisrouteisbasedonthegellingofnitratesolutionsbytheadditionofcitricacidandammoniumhydroxide,followedbyanintensecombustionprocessduetoanexothermicredoxreactionbetweennitrateandcitrateions.TheoptimumtechnicalparametersarethatthepHvalueis5,andthemolarratioofcitricacidtothetotalmetallicionis1.5:1.X-raydiffractioncharacterizationofcalcinedgelshowsthatpurephasewassynthesizedaftercalcinationat1400℃for10h,andtheTEMresultshowsthecalcinedpowderwithaverageparticlesizeisabout150nm.Thegrainresistancecontributestothetotalresistanceofsinteredpelletbelow500℃.Theconductivityofthesinteredpellentat800℃was0.07S-1.cm-1higherthantheconductivityofYSZ(0.05S-1.cm-1at800℃)

简介：1.IntroductionLightrareearthadditioncanremarkablyenhancetheservicelifeofFe-Cr-Alalloyforelectricalheatingelement,butitscontentinthealloymustbecontrolledbelowthelevelof0.1wt-%.Whenthecontentexceedsthat,theperformance

简介：导向剂是结晶尚未完全的晶核雏形，是控制沸石结晶过程最有效的手段。通过在溶液中引入一定量的导向剂，缩短沸石的晶化时间，很好地改善了产品的粒度分布和团聚程度，合成出性能优异的超微4A沸石。

简介：在美国能源部资助下的一个开发项目（磷酸锂铁阴极材料）正在TiaxLLC公司进行中。据说，这种材料可满足电动汽车用的锂离子电池的工艺需求。目前，LiFePO4拥有相当高的能量密度，但是因导电不良而使功率容量受限。

简介：

简介：微观结构和Ni//3艾尔的机械性质基于拥有低杂质内容的Ni-Al-Mosuperalloy-IC6，由水花免职技术的高密度被学习了。结果显示IC6合金在空间和中间的温度两个都有好张力的力量和延伸。(编辑作者摘要)6个裁判员。

简介：Si3N4/TiCnanocompositeceramicshavebeenfabricatedbyhotpressingtechniquewithAl2O3andY2O3asadditives.TheresultsshowedthatwelldispersedcompositepowderwascarriedoutbyaddingdispersantandadjustingpHvaluesofsuspensions.RemarkableincreaseinflexuralstrengthatroomtemperatureswasobtainedbyaddingnanoparticlesinSi3N4matrixwith10%(wtpct)ofnano-Si3N4and15%ofnano-TiC.Theflexuralstrength,fracturetoughnessandhardnesswere1025MPa,7.5MPa·1/2and15.6GPa,respectively.Themicrostructuresofmaterialswereanalyzedbyscanningelectronmicroscopy(SEM)andtransmissionelectronmicroscopy(TEM),whichindicatedthatTiCnanoparticlesdistributeinthematrixandatthegrainboundaries.Accordingtothefractureform,lowcontentsofnanoparticlescouldrefinematrixgrainsandleadtothecrackdeflectionaswellascrackpinning.Themultiplexmicrostructurewasformedbymixingnano-Si3N4particles.Thecracktrajectoriesexhibitedcrackdeflection,rod-likegrainbridgingandpull-out.

简介：在OptioMX4上，我们可以很清楚地看出宾得采用了很多20世纪60年代曾经非常流行的8毫米枪型摄像机的设计元素。可以180度旋转的相机手柄，使OptioMX4拥有了与众不同的握持手感。