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简介：英国剑桥大学、新加坡数据存储研究所与新加坡技术和设计大学的科学家经过研究发现，用可以在不同电状态间快速来回切换的相变材料替代硅，他们有望研制出信息处理速度快1000倍且更小、更环保的计算机。研究发表在最新一期的美国《国家科学院学报》上。

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简介：研究了去离子水作为球磨介质对Mn掺杂（Na0．5Bi0．5）0．88Ca0．12TiO3（BNCT）陶瓷介电性能的影响。相对于酒精，水磨样品的介电常数较小。介电常数温度曲线以及电容变化率温度曲线都比较平坦，在-55～250℃范围内，△C／G25℃≤±15％。介电损耗在100C以上时明显增大。比较和分析了XRD图谱和SEM图片，并借助于EDS探讨了微观机理。

简介：微观结构，机械性质和Cu-0.5wt%的电的电导率上的老化处理的影响为接头材料应用的合金被调查。机械力量和电的电导率的性质与增加老化温度和时间增加。低角度和高角度谷物边界的那种谷物尺寸和部分不是的揭示的年老的立方体合金的微观结构极大地变化了；然而，传播电子显微镜学(TEM)分析与50nm的一种尺寸展出了那beryllides猛冲(鸡冠和NiBe)在谷物被散布。它是，因此断定这些beryllide猛抛改进了机械力量并且另外它是在电的电导率的改进的宠爱。

简介：相等的隧道(ECAP)处理的尖紧迫和常规挤出(前)被用于Mg-12Gd-3Y-0.5Zr(wt%)镁合金以便在机械性质评估潜在的改进。ECAP实验在380污瀠潲散被进行吗？

简介：用固相反应法制备了LnBaCo2O5＋δ（Ln=Gd，Nd，Sm，Pr）-Ba0．5Sr0．5Co0．8Fe0．2O3-δ（质量比为1：1）4种双相混合导体膜。通过XRD分析可知，除了PrBaCo2O5＋δ和Ba0．5Sr0．5Co0．8Fe0．2O3-δ（KSCF）复合时发生明显反应外，其它3种复合膜在复合过程中均显示了良好的化学兼容性。4种双相膜在850℃时透氧率最高的是NdBa-Co2O5＋δ-Ba0．5Sr0．5Co0．8Fe0．2O3-δ（约为0．28mL／（cm2·min））。

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简介：为了在钨铜成立新电介质陶艺，组织，有名字的公式Ba4PrFe0.5Nb9.5O30被稳固的州的反应方法准备。微观结构和绝缘的性质用粉末X光检查衍射，领域排放扫描电子显微镜，和可变温度电介质被学习测试系统。结果证明陶艺有一个单个阶段并且与=b=的房间属于P4bm的空间组12.4839(3)?，c=3.9409(5)?，V=614.192(2)?3。频率依赖者电介质性质证明陶艺在房间温度有象Debye一样松驰，当温度依赖者电介质性质显示陶艺是relaxor，松驰由于nanopolars和氧空缺时。陶艺作为温度马厩在电子陶艺有潜在的应用多层的陶器的电容器。

简介：Soldersizeeffectonearlystageinterfacialintermetalliccompound(IMC)evolutioninwettingreactionbetweenSne3.0Age0.5Cusolderballsandelectrolessnickelelectrolesspalladiumimmersiongold(ENEPIG)padsat250Cwasinvestigated.TheinterfacialIMCstransformedfrominitialneedle-androdtype(Cu,Ni)6Sn5tododecahedron-type(Cu,Ni)6Sn5andthentoneedle-type(Ni,Cu)3Sn4attheearlyinterfacialreactionstage.Moreover,theseIMCtransformationsoccurredearlierinthesmallersolderjoints,wherethedecreasingrateofCuconcentrationwasfasterduetotheCuconsumptionbytheformationofinterfacial(Cu,Ni)6Sn5.Onthermodynamics,thedecreaseofCuconcentrationinliquidsolderchangedthephaseequilibriumattheinterfaceandthusresultedintheevolutionofinterfacialIMCs;onkinetics,largersolderjointshadsufficientCufluxtowardtheinterfacetofeedthe(Cu,Ni)6Sn5growthincontrasttosmallersolderjoints,thusresultedinthedelayedIMCtransformationandtheformationoflargerdodecahedron-type(Cu,Ni)6Sn5grains.Insmallersolders,nospallingbuttheconsumptionof(Cu,Ni)6Sn5grainsbytheformationof(Ni,Cu)3Sn4grainsoccurredwheresmallerdiscrete(Cu,Ni)6Sn5grainsformedattheinterface.

简介：Thisstudywasconductedtodiscusstheeffectofrollingstrainonmicrostructureandtensilepropertiesofdual-phaseMg-8Li-3Al-2Zn-0.5Y(wt%)alloy,whichwaspreparedbycasting,andthenhomogenizedandrolledat200℃.Therollingprocesswasconductedwith10%reductionperpassandfivedifferentaccumulatedstrains,varyingfrom10%to70%.Theresultsindicatethattheas-castandas-rolledMg-8Li-3Al-2Zn-0.5Yalloysarecomposedofα-Mg,β-Li,AlLiandAl2Yphases.Afterrollingprocess,anisotropicmicrostructurewasobserved.a-Mgphasegotelongatedinbothrollingdirectionandtransversedirectionwiththeadditionofrollingstrain.Consequently,thestrengthofthealloyinbothdirectionswasnotablyimprovedwhereastheelongationdeclined,mainlycausedbystrainhardeninganddispersionstrengthening.Thetensilepropertiesoftheas-rolledalloysintheRD,nomattertheYS,UTSortheelongation,arehigherthanthoseoftheTDduetotheirlargerdeformationstrainandsignificantanisotropyinthehcpα-Mgphase.Inaddition,thefractureandstrengtheningmechanismofthetestedalloyswerealsoinvestigatedsystematically.

简介：Highentropyalloyhasattractedincreasingattentions.However,toenhancethealloystrengthoftenleadstoimpairmentoftheductility,orviceversa.HerewereportedaheattreatmentapproachonAlCrFeNi2Ti0.5highentropyalloy,whichcanelevatethestrengthandductilitysimultaneously.AningotofAlCrFeNi2Ti0.5weighing2.5kgwasfirstlyfabricatedbymediumfrequencyinductionmelting.Thensamplesfromthesameheightofthebulkingotwereannealedfor6hat600,700,800and1000℃,respectively.After1000℃annealing,anoptimalmicrostructurewasobtainedbyusingourapproachwhichcanmakesomeprecipitationparticlesdistributehomogeneouslyinthedendriteinteriorwhilekeeptheinterdendritestructureasasinglesolidsolutionphase.ThemechanicaltestonthisAlCrFeNi2Ti0.5alloysampleshowedthat,thecompressivefracturestrengthσbcwasincreasedbyabout600MPaandtheplasticstrainepwasdoubled,comparedwiththoseoftheas-castsample.Ourapproachcanbereadilyadaptedtolarge-scaleindustrialproductionofhighentropyalloyswithhighstrengthandductilitybyproperannealingtreatment.

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