学科分类
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8 个结果
  • 简介:目前距离XboxOne11月22B上市的时间已经越来越近,而对于广大的开发人员来说也到了最后的冲刺阶段。不过最近有开发人员表示,Xboxone与头号竞争对手PIayStation4相比,似乎在性能上大幅落后于竞争对手。

  • 标签: 开发 速度 竞争对手 XBOX
  • 简介:Inthisstudy,theeffectofmulti-walledcarbonnanotubes(MWCNTs)additiveonthedehydridingpropertiesoftheZn(BH4)2/NaCIcompositepreparedbyhighenergyballmillingwereinvestigated.X-raydiffraction(XRD),Fouriertransforminfraredspectroscopy(FTIR)resultsdemonstratedthatZn(BH4)2wasproducedfrommechanochemicalreactionbetweenZnCI2andNaBH4.Comparedwiththeundopedsample,10wt%MWCNTseffectivelyloweredthedecompositiontemperatureofZn(BH4)2by15℃.Thecomplexreleased3.6wt%hydrogenwithin250sat100℃andtotallyreleased4.5wt%hydrogenwithin2500s,indicatingithasaconsiderablepotentialasahydrogenstoragematerial.

  • 标签: 多壁碳纳米管 ZNCL2 复合添加剂 机械合金化 脱附性能 制备
  • 简介:Inthisstudy,Almatrixcompositesreinforcedby7.5and15vol.%B4CparticlesandalsomonolithicAl(AlwithouttheB4Cparticles)wereproducedbywetattritionmillingandsubsequenthotforwardextrusionprocesses.Themicrostructureofthecomposites,evaluatedbyscanningelectronmicroscopy(SEM),showedthattheB4CparticleswereproperlydistributedintheAlmatrix.MechanicalpropertiesoftheAI/B4CcompositesandmonolithicAlwereinvestigatedbytensile,wearandhardnesstests.TheresultsrevealedthatwithincreasingcontentofB4Cparticles,thetensilestrengthandmicrohardnessofcompositesincreasedbuttheelongationdecreased.Inaddition,thetensilestrengthandmicrohardnessofcompositesampleswerehigherthanthoseofmonolithicAl.ThedensitymeasurementsrevealedthatthedensityofcompositesdecreasedwithincreasingcontentoftheB4Cparticles.

  • 标签: 铝基复合材料 湿法研磨 微观结构 力学性能 热挤压 B4C
  • 简介:分析了尖晶石型钛酸锂(Li4Ti5O12)的结构,介绍了其制备方法,包括固相反应法、溶胶-凝胶法、水热合成法等.固相反应法易于实现工业化生产,但颗粒的形貌不易控制;溶胶凝胶法制得的Li4Ti5O12材料纯度高、粒径小,但是成本高;水热法合成材料的尺寸大小均一,但需要控制的条件多.此外,讨论了钛酸锂电化学性能的一些改性方法,包括减小颗粒尺寸、掺杂和碳包覆等,并展望了其发展方向.

  • 标签: 锂离子电池 负极材料 LI4TI5O12 制备方法
  • 简介:Atomized,pre-alloyedTi—24Nb—4Zr—7.9Sn(wt%)powderwasusedtofabricatesolid,prototypecomponentsbyelectronbeammelting(EBM).Vickersmicroindentationhardnessvalueswereobservedtoaverage2GPafortheprecursorpowderand2.5GPaforthesolid,EBM-fabricatedproducts.Thepowderandsolidproductmicrostructureswereexaminedbyopticalandelectronmicroscopy.X-raydiffractionanalysesshowedthattheyhadbccβ-phasemicrostructure.However,itwasfoundbytransmissionelectronmicroscopythattheEBM-fabricatedproducthadplatemorphologywithspace~100—200nm.Althoughthecorrespondingselectedareadiffractionpatternscanbeindexedbyβ-phaseplusα'-martensitewithorthorhombiccrystalstructure,thedark-fieldanalysesfailedtoobservethea'-martensite.Suchphenomenonwasalsofoundindeformedgummetalsandexplainedbystress-induceddiffusionscatteringduetophononsoftening.

  • 标签: 电子束熔炼 预合金化 硬度值 显微组织 X-射线衍射分析 透射电子显微镜
  • 简介:以一步水热法制备了具有分级结构的泡沫镍@C/氧化钴复合电极材料,研究了该材料的微观形貌结构以及其超级电容特性.结果表明,在1mol/LKOH溶液中,泡沫镍@C/Co3O4复合超级电容器电极材料电化学性能良好,面积比容量达1400mF/cm2.

  • 标签: 氧化钴 超级电容器 一步水热法