学科分类
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15 个结果
  • 简介:相片折射的效果的一个理论处理和在液晶的nematic的联系非线性的光过程的试验性的确认被介绍。效果被归因于可以来自光电游离杂质的相片费用导致的dc空格费用域。现象被分析,在nematic液晶的相片折射度的一个理论模型被开发。新试验性的结果被发现在对理论的好同意。(编辑作者摘要)5个裁判员。

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  • 简介:在铝的氢内容融化在不同温度被检测。在铝的结构融化被分子的动力学调查模拟。关联功能,原子协作数字和铝的粘性融化的对的第一个山峰位置在一样的温度范围反常地被计算,他们变化了。氢吸收的机制被讨论了。从分子的动力学计算,互相依赖在之间融化结构的性质和氢吸收被获得。

  • 标签: 结构性能 吸收机制 氢含量 液态铝 分子动力学计算 分子动力学模拟
  • 简介:ThedensityofNi-Alalloysinbothliquidstateandsolid-liquidcoexistencestatewasmeasuredwithamodifiedpycnometricmethod.ItwasfoundthatthedensityofNI-AlalloysdecreaseswithincreasingtemperatureandAlconcentrationinthealloys.ThemolarvolumeofliquidNi-AlbinaryalloysincreaseswiththeincreaseoftemperatureandAlconcentration.ThepartialmolarvolumeofAlinNI-Albinaryalloywascalculatedapproximately.ThemolarvolumeofliquidNI-Alalloydeterminedinthepresentworkshowsanegativedeviationfromtheideallinearmolarvolume.

  • 标签: 镍铝合金 密度 改性比重瓶测量法 克分子量 固液共存态
  • 简介:Thebondingofsteelplatetoaluminumliquidwasconductedusingrapidsolidification.Theinfluenceofdiffusiontimeoninterfacialstructurewasstudied.Theresultsshowedthatundertheconditionof750℃forthetemperatureofaluminumliquidand200℃forthepreheattemperatureofsteelplate,whendiffusiontimewasshorterthan4.3s,therewasonlyFe-Alsolidsolutionattheinterface.Whendiffusiontimewaslongerthan4.3s,Fe-Alcompoundbegantoformattheinterface.TherelationshipsbetweendiffusiontimetandthicknessofFe-AlcompoundlayerHareH=-9.72+2.62t-0.08t^2(4.3s≤t≤15s)andH=2.79+0.647t=0.033t^2(t>15s).

  • 标签: 焊接 快速凝固 结构 扩散时间
  • 简介:nano-TiO2粒子被液体水解作用方法准备并且描绘了使用XRD。它对二个代表的抗菌剂活动细菌,Escherichiacoli和葡萄球菌aureus,也被学习。试验性的结果出现了在600700瑵椠?楶牴?整瑳?湡?敲慰物?的nano-TiO2calcinated???業散挠污慶楲污搠晥'太B.吗??

  • 标签: 纳米二氧化钛 抗菌活性 XRD表征 制备 水解液 金黄色葡萄球菌
  • 简介:Liquidcompositemoulding(LCM)processesareusedtomanufacturehighqualityandcomplex-shapedcompositepartsintheautomotive,marine,aerospaceandcivilindustries.On-linesensingplaysanimportantroleincontrollingthequalityofthefinalproductintheLCMmanufacturingenvironment.Thelong-periodfibergrating(LPG)technology,anewreal-timefiberopticsensorsystem,wasdevelopedtomonitortheflowfrontprogression.Thesensoroperationandcharacterizationundervariousprocessconditionswerediscussedindetail.TheexperimentalresultsshowedthatLPGsensorswererobustandreliabletodetectthearrivalofresinatpre-selectedlocationsinstructureswithlow-mediumfibervolumefraction;howeverwerelimitedatdifferentdepthsinstructureswithhighfibervolumefraction.

  • 标签: 复合材料 液态成型 流量监测 长周期格子
  • 简介:AresearchonkineticsofAlevaporationfromliquidU—Alalloyswasmadeinavacuuminductionmelting(VIM)furnaceat1673—1843K.TheevaporationrateofAlwasfoundtobefirstorderwithrespecttoAlcontentinthemelt.TheoverallmasstransfercoefficientofAlwasdeterminedanditwasfoundthattheevaporationrateofAlincreasedwithincreasingtemperatures.TheapparentactivationenergyofAlevaporationat1673-1843Kwas171.5kJmol-1.ThevalueofmasstransfercoefficientofAlintheliquidphasewasestimatedtobe3.77×10-6,7.41×10-6,and9.40×10-6ms-1at1673,1753,and1843K,respectively.Meanwhile,ratedeterminingstepswerediscussedanditwasconcludedthattheevaporationrateofAlismainlycontrolledbyliquidphasemasstransfer.

  • 标签: AL EVAPORATION KINETICS LIQUID U-Al alloys
  • 简介:Theliquidphasebehaviorofthefine-grained5083Alalloyobtainedthroughthermomechanicalprocesswasinvestigatedduringthetensiletestsinatemperaturerangeof380-570-Candstrainraterangeof4.17×10-4-1.0×10-2s-1.Themaximumelongation530%ofthefine-grained5083Alalloywasobtainedat550-Cand4.17×10-4s-1.Fractureanalysisbyscanningelectronmicroscopy(SEM)indicatedthattheformationoffilament(formedbyliquidphase)wasgreatlyaffectedbythetensiletemperatureandstrainrate.Theresultsalsoshowedthattheoptimummorphologyofformedfilamentwasobtainedat550-Candastrainrateof4.17×10-4s-1.Theeffectofliquidphaseonsuperplasticdeformationofthealloywasfurtherdiscussed.

  • 标签: AL合金 细粒度 相行为 高温变形 扫描电子显微镜 液体
  • 简介:HighperformanceliquidchromatographywithaC18reverse-phasecolumnwasusedtoseparatethefivecomponentsincoughsyrup,includingacetaminophen,p-aminophenol,caffeine,chlorphenaminemaleateandguaifenesin.Themobilephaseconsistsof15wi%acetonitrile,0.004mol/Lsodiumheptylsulfonate,0.03mole/Lpotassiumdi-hydrogenphosphateandtriethylamine(volumeratio13:40:44:3),thepHofwhichisadjustedto3.0byphosphoricacid.Thecontentsofthefivecomponentsareanalyzedonanultravioletspectropho-tometerat254nm,withaflowrateof0.4mL/min.Theresultsshowthatthecalibrationcurvesarelinearinacertainrange.Theaveragerecoveryoffivecomponentsisbetween96.31%and102.3%.

  • 标签: 醋氨酚 高效液相色谱法 反相位柱 咳嗽
  • 简介:SiCp/AI金属矩阵的表面上的紧缩的氧化物合成(SiCp/AIMMC)极大地取决于关节的性质。镶嵌的劈啪作响的目标被使用由血浆侵蚀在SiCp/AIMMC的结合的表面上完全蚀刻氧化物。在厚度的5妈妈的Cu/Ni/Cu电影被磁控管劈啪作响方法在一样的真空房间在干净结合表面上准备,它在结合的短暂液相(TLP)作为夹层被扮演过程。与单个Cu陪衬和Ni陪衬夹层的一样的厚度相比,200MPa的shear力量在TLP结合期间用Cu/Ni/Cu电影夹层被获得,它是89.7%碱金属的。另外,结合的区域的

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  • 简介:Ti-47Al-2Cr-2Nb合金的微观结构进化在使类型凉下来的液体金属上被调查在高温度的方向性的团结的仪器坡度。它与主要房间/树突被团结的分析表演,然后阶段通过包晶体的反应被形成。一旦圆柱的谷物长成稳定的状态,薄片状的取向与45的角度倾向了

  • 标签: 组织演变 凝固过程 金合金 液体金属 冷却 LMC