简介：Theeffectsofarseniconthecathodepolarizationprocessinzincelectrowinning,itskineticsequation,parametersandpolarizationmechanismwerestudiedbymultipleelectrochemistryapproaches.Theexperimentalresultsshowthat,if[As3+]≥3mg/L,electrowinningfirstentersintostationarypassivationrange,andthenentersintoprecipitationrange,whichindicatesthatthedepolarizationfunctionofimpurityarseniciszincelectrowinning.

简介：１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｎｉｃｋｅｌａｌｏｙｓａｎｄｃｏｍｐｌｅｘｅｓａｒｅｗｉｄｅｌｙｕｓｅｄａｓｍａｇｎｅｔｉｃ，ｏｐｔｉｃａｌ，ｎｕｃｌｅａｒａｎｄｓｕｐｅｒｃｏｎｄｕｃｔｉｎｇｍａｔｅｒｉａｌｓ［１，２］．Ｍａｎｙｎｉｃｋｅｌｃｏｍ...

简介：

简介：ThefracturebehaviorofSiCp/A356compositeatroomandhightemperatureswasstudied.Undertensilestressconditionatroomtemperature,thefractureismostlyacombinationofthebrittlefractureofSiCparticlesandductilefractureofA356matrix.Asthetensiletemperatureincreases,thecompositechangesthemainfracturebehaviortotheseparationfractureofthebondingsurfacebetweenSiCparticlesandA356matrix.Whenthetensiletemperaturereaches573K,thefracturebehaviorofthecompositesisalmostthewholeseparationfractureofthebondingsurface,whichisthemainstrengtheningmechanismathightemperature.Underthecyclestressconditionatroomandhightemperatures,themainfracturebehaviorofthecompositesisalwaysacombinationofthebrittlefractureofSiCparticlesandductilefractureofA356matrix.However,underthecyclestressathightemperature,cyclebehaviorofthecompositeschangesfromcyclehardeningatroomtemperaturetothecyclesofteningathightemperature.

简介：一个铜矩阵合成与否定热扩大系数由β-LiAlSiO4增强了用真空hot-pressedsintering被制作技术。热扩大行为合成被调查，并且在矩阵的平均剩余压力被一个简单模型分析。结果显示在矩阵的剩余压力影响热扩大性质。在热处理以后，合成减少的热扩大(CTE)的系数极大地。CTE在在50350°C之间的热骑车以后合成最低。

简介：macroporous的吸着性质为La3+离子的弱酸树脂(D113)被化学分析和红外系列学习。试验性的结果显示D113树脂在pH=为La3+有一个好吸附能力6.0在HAc-NaAc媒介。静态地浸透的吸附能力是273.3mg/g。La3+/Ce3+，La3+/Gd3+，La3+/Er3+，和La3+/Y3+的分离系数分别地是2.29，3.64，4.27，和0.627。吸附的明显的激活精力，Ea是吸着的18.4kJ/mol，热力学参数H，S，和G是4.53kJ/mol，61.8J/(mol.K)，?13.9kJ/mol分别地。为La3+的D113的吸附行为服从Freundlich等温线。在树脂上吸附的La3+能是由2.0mol/LHCl份量上的eluted。

简介：ThedisproportionatedphasesofNdHx,Fe2B,anda-FefromNd2Fe14BwereappliedtoprepareNdFeBmagnetsbytwodifferentroutes.Theresultsshowthattherouteofannealinginhorizontalvacuumsinteringfurnacecannotreachthepurposeofcompleterecombinationafterthehotpressingandhotdeformationprocessduetothelackofdehydrogenationchannel.Therouteofapplyinglowpressureof4–25MPaontheas-disproportionatedgreencompactduringthedesorptionrecombinationprocessinsituhotdeformationinasparkplasmasintering(SPS)systemcanobtaincompletelyrecombinedNdFeBmagnetwithgoodanisotropyandmagneticproperties.Themaximummagneticproperties,(BH)max=201kJm-3,Br=1.142TandHcj=469kAm-1,areobtainedafterbeingtreatedfor15minat750°Cunderlowpressure.

简介：SiC/Si<潜水艇class=“a-plus-plus”>3N<潜水艇class=“a-plus-plus”>4合成是用自我繁殖的高温度的燃烧合成-Si3N<潜水艇class=“a-plus-plus”>4粉末和适当数量原文如此搽粉。两个都，sintering添加剂，系统被使用，它是YAN(Y2O3艾尔2O3AlN)并且YN(Y2O3AlN)。影响在SiC/Si的sintering行为上原文如此满意<潜水艇class=“a-plus-plus”>3N<潜水艇class=“a-plus-plus”>4合成被调查。结果证明有二个sintering添加剂系统的样品的密度，收缩，弯曲力量，坚硬，和破裂坚韧随内容的增加增加第一原文如此然后甚至当原文如此内容不断地增加时，减少。样品的重量损失的趋势是相反的。有最好的机械性质的样品原文如此满意在二个系统是不同的。为YAN系统，当原文如此内容到达10时，样品的最好的机械性质被获得?%，当至于YN系统它是5时?%。YN样品的性质比YAN样品优异。J阶段(2Y2O3吠敨爠畯整漠?灡汰楹杮氠睯瀠敲獳牵?景???慐漠?桴?獡搭獩牰灯牯楴湯瑡摥朠敲湥挠浯慰瑣搠牵湩?桴?敤潳灲楴湯爠'啼礃A慮楴湯瀠潲散獳椠?楳畴栠瑯搠晥牯慭楴湯椠??灳牡?汰獡慭猠湩整楲杮?偓?猠獹整?慣?扯慴湩挠浯汰瑥汥?敲潣扭湩摥丠??洠条敮?楷桴朠潯?湡獩瑯潲祰愠摮洠条敮楴?牰灯牥楴獥?桔?慭楸畭?慭湧瑥捩瀠潲数瑲敩??????汣獡?愢瀭畬?汰獵?慭?猯'T?????鮪徬鞪??极脿???醰鑛??鴿鎘銳????�

简介：在370点的Cu底层上的熔融的双性人的弄湿的行为上的直接电流的效果

简介：Therecenttrendofvehicledesignaimsatcrashsafetyandenvironmentally-friendlyaspect.Forthecrashsafetyaspect,theenergyabsorbingmembersshouldabsorbcollisionenergysufficientlybutfortheenvironmentally-friendlyaspect,thevehiclestructuremustbelightweightinordertoimprovethefuelefficiencyandreducethetailgasemission.Therefore,thelightweightofvehiclemustbeachievedinasecuringsafetystatusofcrash.Analuminumorcarbonfiberreinforcedplastics(CFRP)isrepresentativeoneofthelight-weightmaterials.BasedontherespectivecollapsebehaviorofaluminumandCFRPmember,thecollapsebehaviorofhybridthin-walledmemberwasevaluated.ThehybridmembersweremanufacturedbywrappingCFRPprepregsheetsoutsidethealuminumhollowmembersintheautoclave.BecausetheCFRPisananisotropicmaterialwhosemechanicalproperties,suchasstrengthandelasticity,changewithitsstackingcondition,theeffectsofthestackingconditiononthecollapsebehaviorevaluationofthehybridthin-walledmemberweretested.Thecollapsemodeandenergyabsorptioncapabilityofthehybridthin-walledmemberwereanalyzedwiththechangeofthefiberorientationangleandinterfacenumber.

简介：ArapidlysolidifiedAl-2.5Ti-2.5Fe-2.5Cr(massfractionin%)alloywaspreparedbymeltspinning.Asquenchedandas-annealedmicrostructureswerestudiedbyX-raydiffractometry(XRD),transmissionelectronmicroscopy(TEM),high-resolutiontransmissionelectronmicroscopy(HREM)andenergydispersivespectrum(EDS)analysis.Themicrohardnessofthealloyatdifferentannealingtemperatureswasmeasured.TheresultsobtainedindicatethatthemicrohardnessoftherapidlysolidifiedAl-2.5Ti-2.5Fe-2.5Cralloydoesnotvarywithdifferentannealingtemperatures.Theas-quenchedmicrostructureofthealloyincludestwokindsofdispersedprimaryphases:Al3TiandAl13(Cr,Fe)2.Afterannealingat400℃for10h,thestablephaseAl13Fe4appearsinthemicrostructure.

简介：ThehotdeformationbehaviorofTC18alloyatstrainratesrangingfrom1910-4to1910-2s-1andtemperaturesrangingfrom25to800°CwasstudiedusingaWDW-300electronicuniversaltestingmachine.Therelationshipsbetweentruestressandtruestrainshowthatflowstressdecreaseswiththeincreaseoftemperatureandincreasesasstrainrateincreases.Theeffectofstrainrateontheflowstressbecomespronouncedathighertemperatures.Atroomtemperature,theriverpatterncharacteristicofbrittlefractureandthedimplepatterntypicalofductilefracturearefoundtoexistindifferentregionsoffracturesurfacesofthesamples.AnimprovedconstitutiverelationshipisproposedtoaccuratelydescribetheflowstressofTC18byconsideringtheeffectofstrain.Andamicroscopicmodelisalsodeducedwhichcanlinkthephysicalmechanismstothemacroscopicexperimentalresults.Agoodagreementisobtainedbetweenthepredictionsofthemicroscopicmodelandtheresultsofthemacroscopicexperiment.

简介：Thecorrosionbehaviorandanti-corrosionmechanismoftheZn-Ni-Al2O3compositecoatingwereinvestigatedbySEM,EDSandXPS.TheresultsindicatethatthecorrosiontypeoftheZn-Ni-Al2O3coatingsinneutral5wt.%NaClsolutionisuniformcorrosion.ThepresenceofcompactanduniformlydispersednanoaluminaparticlessubstantiallyinhibitsthecorrosionofZn-Ni-Al2O3compositecoatings.Intheinitialcorrosionstage,thecorrosiveproductsofZn-NimatrixformacompactZnCl2·4Zn(OH)2layer.Withthedevelopmentofcorrosion,somenanoaluminaparticlesareembeddedandformaNienrichmentlayer.InNienrichmentlayer,NipresentsasNiandNiO.

简介：ThecorrosionbehaviorofZL104alloyatdifferentstates(as-castandheattreatment)insaltspraycorrosion(SSC)wasstudied.Theresultsshowthatthesampletreatedafterrefinementandmodifciationhastheleastcorrosiveresistancecomparedwiththesamplebearingas-caststucureatthebeginningofthecorrosion.Asthecorrosionprocesscontinued.however,thetrendreverseditself.After44hcontinuouscorrosion,thecorrosiveratesofallsamplestendtobestable.Afterexperiments,thesamplebearingas-caststructurehadthemostcorrosiveproductsonthesurfacewhereasthesamplebeingrefinedandmodifiedhadtheleastproducts.TheFouriertransformationinfraredspectroscopy(FTIR)analysesofthecorrosionproductsshowthattheseproductsarecomposedofhydroxyl-containingsubstances.

简介：晶体结构和加氢行为(La_(1-x)Mg_x)_3Al(x=0.1，0.2，0.3，和0.4)合金被调查。这被发现有x=的合金0.1La和第0.2consi(Mg，艾尔)，La，和一个新奇阶段。新奇阶段作为La_2Al被决定。当Mg满足增加，La_2Al的数量减少，这被显示出。当x增加到0.3时，onlyLa(Mg，艾尔)并且La_2Al的小数量存在。当x是0.4时，La_2Al阶段消失，合金包含两La(Mg，艾尔)并且La(艾尔，Mg)_2洗阶段。(La_(0.9)Mg_(0.1))_3Al并且(La_(0.7)Mg_(0.3))_3Al合金能被氢的吸收在473K分解成LaH_3，MgH_2，和La_2Al_5。

简介：Therulessuchasprocessparametersaffectingjointpropertiesandtheevolutionprincipleofweld'smicrostructurehavebeenresearchedbyadoptingdiffusionweldingprocesstoconnectSiCw/6061Alcomposite.ExperimentalresultsshowthatthereexistsacriticaltemperatureregionbetweensolidandliquidphaselineofSiCw/6061Alcomposite,andtheregionwillshrinkwiththeincreasingofweldingpressure.Whendiffusionweldingoccurredunderthecriticaltemperatureregion,weldingjointexhibitsbadpropertyofbonding,andthematrixandthereinforcementcan'tbondeffectively.Whendiffusionweldingoccurredinthecriticaltemperatureregion,thestrengthofweldingjointchangeswidelywiththevariationofweldingtemperature.Whenweldingtemperaturevariesin10℃,thestrengthofweldingjointwillchangeobviously.Onlywhenweldingtemperatureishigherthanthecriticaltemperatureregion,stablejointpropertiescanbeobtained.Simultaneouslythematrixandthereinforcementhasbetterinterfacialbondedindiffusionweldinginterface,andnoobviousinterfacereactionoccurred,andthusdiffusionweldingofSiCw/6061Alcompositecanbesuccessfullyrealized.

简介：热变丑行为借助于扫描电子显微镜学(SEM)和单轴的热紧张被学习。流动应力上的变丑温度和紧张率的效果被评估，并且变丑机制被分析。压力紧张Ti-6Al-4V(TC4)合金表和TC4合金酒吧弄弯在的结果表演提高了温度有不同形式和规则。TC4的流动应力被紧张率和变丑温度控制。流动压力随高温度的增加减少。变丑机制在高温度区域和谷物边界以内展出动态恢复和再结晶特征在低温度滑动行为。

简介：Zr41Ti14Cu12.5Ni8是22.5Fe2体积金属性的玻璃(BMG)在以经常的率的连续加热期间被调查。基于Zr的BMG的玻璃转变和结晶化被存储模量E′的大小因此描绘并且内部磨擦Q−1。有温度的这些动态机械数量的变化被互连并且与以一样的加热率获得的DSC踪迹一致好，这被发现。在内部磨擦曲线的第一座山峰的起源是仔细与动态玻璃转变和随后的主要结晶化有关。而且，它能被一个物理模型很好描述，它能描绘原子活动性和机械反应混乱压缩材料。与DSC踪迹比较，BMG的第一座内部磨擦山峰的相对位置被发现依赖于它对结晶化的热稳定性。

简介：HotcompressionbehaviorofTiC–Al2O3/AlcompositeswasstudiedusingtheGleeble-1500systematatemperaturerangeof300–550°Candatstrainraterangeof0.01–10.00s-1.TheassociatedstructuralchangeswerestudiedbyTEMobservations.Theresultsshowthatstressleveldecreaseswithdeformationtemperatureincreasingandstrainratedecreasing,whichcanberepresentedbyaZener–Hollomonparameterinanexponent-typeequationwithhotdeformationactivationenergyQof172.56kJ·mol-1.Dynamicrecoveryoccurseasilywhenstrainratesarelessthan10.00s-1.Dynamicrecrystallizationcanoccuratstrainrateof10.00s-1.

简介：Aseriesoftheelectrochemicalandlong-termcorrosiontestswascarriedoutina3.5wt%Na2SO4solutiononthermal-sprayedWC-17CoandWC-10Co-4Crcermetcoatingsinordertoexaminetheeffectofcompositionofbindermaterialsonthecorrosionbehavior.TheresultsrevealthattheoverallcorrosionresistanceoftheWC-17CocoatingisinferiortothatoftheWC–Co–CrcoatingsduetothecorrosionofbindermaterialswhichinduceWCparticlestofalloff.CoOandWO3oxidefilmsformonthesurfaceofWC-17CocoatinginNa2SO4solutionelectrochemicalcorrosionprocess,whichwillprotectthecoatingintheprocessofcorrosion.Cr2O3oxidefilmformedontheWC-10Co-4Crcoatingsurfacehasastronghinderedroletocorrosion.ThecorrosionmechanismofWC-17CocoatinginNa2SO4solutionisentirecorrosionofComatrix,whileitisfilm-holecorrosionmechanismforWC-10Co-4Crcoating.