简介：美国休斯敦大学科学家们的研究发现了一种在非超导材料上诱发超导特性的方法，同时还可以增加已知超导材料的效率，对于提高超导体应用可行性是一个突破。

简介：Recentresearchshowsthattheadditionofchitosanmicrospheres（CMs）topoly（L-lactide）（PLLA）canresultinacompositescaffoldmaterialwithimprovedbiocompatibilityandmechanicalpropertiesfortissueengineeringapplications.However,researchregardingtheinfluenceofCMsonscaffolddegradationisabsentintheliterature.ThispaperpresentsastudyontheinvitrodegradationofscaffoldsmadefromPLLAwithCMs.Inthisstudy,thePLLA/CMsscaffoldswitha25%ratioofCMstoPLLAwereimmersedinphosphate-bufferedsaline（PBS）solutionat37℃for8weeks.Theinvitrodegradationofthescaffoldswasinvestigatedusingmicro-computedtomography（μCT）,weightlossanalysis,Ramanspectroscopy,anddifferentialscanningcalorimetry（DSC）.MicrostructurechangesduringdegradationweremonitoredusingμCT.TheμCTresultswereconsistentwiththeresultsobtainedfromRamanspectraandDSCanalysis,whichreflectedthataddingCMsintoPLLAcandecreasethedegradationratecomparedwithpurePLLAscaffolds.TheresultssuggestthatPLLA/CMsscaffolddegradationcanberegulatedandcontrolledtomeetrequirementsimposedagiventissueengineeringapplication.

简介：制备了SO4^2-／Al2O3／La3＋固体超强酸和辛酸亚锡复配作为丙交酯合成的催化剂。经多种催化剂的催化效率比较，进行多组实验发现该催化剂在较高反应压力下高产丙交酯的合成条件。结果表明，催化剂、反应温度、脱水时间等对丙交酯的产率有显著影响。

简介：近日，英国《每日电讯报》网站报道，牛津大学的碳材料设计公司在生产“内嵌富勒烯”材料。该公司以2．2万英镑卖出了第一批200微克的“内嵌富勒烯”材料，相当于每克价值1亿英镑。有媒体将之称为世界最贵材料。

简介：磨擦促使处理(FSP)作为在12修理裂缝的一个方法被调查?公里厚304L不锈钢板。愈合的可行性被用一个PCBN/W-Re工具处理一个逐渐变细的裂缝与表明一25?公里直径肩膀和6.4的大头针长度?公里。实验证明愈合是可能的开始的一个裂缝狭窄然后日益增多地长大到2的宽度?公里。板实验上的祷告被用来为创造发现最好的参数一巩固与贱金属相比与坚硬差别的最少的数量搅动地区。在一些标本的谷物精炼更高导致了大部分搅动地区坚硬，与贱金属相比。谷物尺寸对microhardness的一个阴谋显示出在谷物尺寸和坚硬之间的很强壮的反的关联，从Hall-Petch关系期望。腐蚀测试被执行以便在stir地区的潜在的促进感受性上评估FSP的效果。在1000以后?在在没有腐蚀产品在基础材料控制上或在任何磨擦上形成了，这被发现的房间温度的3.5%盐溶液的断断续续的沉浸的h搅动处理标本。

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简介：ThispaperpresentsanexperimentalinvestigationonanAISI316Lstainlesssteelregardingmechanicalproper-tiesandshortuniaxialcreeptestsatelevatedtemperatures.Theshorttimecreeptestswerecarriedoutunderdifferentbutconstantstresses.Theobtaineddataofultimatetensilestrength,yieldstrength,creepcurvesandeffectsofelevatedtemperaturesonmechanicalpropertieswerepresented.Foraselectedrheologicalmodel,materialparameterswereobtained.Asajustification,suchrheologicalmodelisimplementedinthefiniteelementprocedureforanuniaxiallystressedspecimeninselectedenvironmentalconditions.

简介：在各种各样的应力下面的316L不锈钢(316LSS)的Pitting腐蚀被potentiodynamic学习在3.5%NaCl答案的极化，电气化学的阻抗光谱学(EIS)和Mott-Schottky(MS)分析。极化曲线的结果证明随压力的增加，pitting潜力和被动当前的密度显著地减少firstly(180MPa)，然后极大地增加(200MPa)。在极化测试以后的样品的相应表面形态学很好对应于结果。Mott-Schottky分析证明了在潜力与更积极的fl吸附到被动film的表面的最少的Cl，显示一个中等压力能增加在3.5%NaCl答案的316LSS的pitting腐蚀电阻。

简介：L＆LProducts公司开发了一种最新的热塑性环氧木塑复合材料（WPC），树脂为非结晶性具有极性，其密度为1．2g／m^3，熔体质量流动速率范围在5～50g／min之间，玻璃化转变温度较低、范围在85～95．5℃之间，可添加高含量的木质和其他纤维材料同环氧树脂进行共混，而无需添加相容剂。

简介：Overcasting是过去常生产铝(固体)的一种新有点不一样的加入技术结合的/magnesium(液体)在这研究的二金属的材料。为Al/Mg(A390/AM60)二金属的样品，接口微观结构是研究点，它直接影响机械性质。因此，发现一个方法改进接口微观结构具有重要重要性。这研究在二金属的样品的A390/AM60接口微观结构上在液体Mg合金和热处理在钙(Ca)的效果上集中了增加。严峻的结果证明与在AM60的Ca增加，由于二个可能的原因，接口微观结构和A390/AM60二金属的样品的shear力量能被改进。热处理能进一步由溶解-Mg17Al12进-Mg并且破坏Mg2Si层结构。

简介：Achievingnotonlyhighmechanicalstrengthsbutalsohighductilityisrecentlyestablishedusinganadditivemanufacturingtechniquecalledselectivelasermelting.Inthepresentstudy,stainlesssteel304Lfullydensesamplesweresuccessfullyprintedusingthe3Dsystems-ProX300printingmachine.TheductilityandtensileyieldstrengthwerealmosttwoandthreetimeshighercomparedtothoseofASTMcast'salloy.Honeycomblikenano-cellularstructurew让hdifferentorientationwasobservedinthefinegrains(-4μm)duetofastcoolingrate.Inadd让ion,theformationofmartensitephaseinrandomgrainsisalsoacontributortothestrengths.Furthermore,negativeresidualstressesinthebuildandhorizonraldirectionsweredetectedandassistedfurtherincreaseinthetensilestrength.Fractographyrevealedtheductilefeatureofplasticdeformationandthecrackopeningsatunmeltedparticlesorpores.

简介：Thestudyofthetriplejunctionsofthegrainboundariesinsomefccsolidsolutions,orderedalloysandintermetallicswithL12hasbeencarriedoutusingtheopticalmetallographyandTEMmethods.Two-typesofthetriplejunctionswerefoundinthealloysinvestigated(1),consistingoftheboundariesoftherandom(RT),and(2),consistingoftheRTboundaryandthespecialboundaries(ST).TherelativevaluesoftheRTandSTboundaryenergyweredeterminedonthebasisofthemeasurementsoftheanglesbetweenthegrainboundaryplanes.IthasbeenshownthattheenergyofSTboundariesincreaseswiththeincreaseofthestackingfault(SF)energy.TheenergyoftheRTboundariesdoesnotdependontheSFenergy.

简介：作为冷滚动并且退火的联合处理的Thermomechanical在奥氏体的不锈钢上被执行301，304并且304L。二冷滚动步直到75%的减小的每一个与在800点的中间的退火被相结合

简介：Inthisstudy,resistancespotweldabilityof180gradebakehardeningsteel(BH180),7123gradeinterstitialfreesteel(IF7123)and304gradeausteniticstainlesssteel(AISI304L)witheachotherwasinvestigated.Inthejoiningprocess,electrodepressureandweldcurrentwerekeptconstantandsixdifferentweldtimewerechosen.Microstructure,microhardness,tensile-shearpropertiesandfracturetypesofresistancespotweldedjointswereexamined.Inordertocharacterizethemetallurgicalstructureoftheweldedjoint,themicrostructuralprofilewasdeveloped,andtherelationshipbetweenmechanicalpropertiesandmicrostructurewasdetermined.Thechangeofweldtime,nuggetdiameter,theHAZ(heataffectedzone)widthandtheelectrodeimmersiondepthwerealsoinvestigated.WeldedjointswereexaminedbySEM(scanningelectronmicroscopy)imagesoffracturesurface.Asaresultoftheexperiment,itwasdeterminedthatwithincreasingweldtime,tensileshearloadbearingcapacity(TLBC)increasedwithweldtimeupto25cycleandtwotypesoftearingoccurred.ItwasalsodeterminedthatwhilethefailureoccurredfromIFsideattheBH180+IF7123joint,itoccurredfromtheBH180sideattheBH180+AISI304Ljoint.

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简介：Layeredcathodematerialsofhigh-temperaturelithiumbatteries,LiNi1/3Mn1/3Co1/3O2aresynthesizedbyasol-gelmethodwithvariationinfinalsinteringtemperatureforboreholeapplications.Thestructure,morphologyandhigh-temperaturedischargeperformanceoftheseresultingproductsareinvestigatedbyX-RayDiffraction（XRD）,scanningelectronmicroscopy（SEM）,laserparticlesizeanalysis,galvanostaticandpulsedischarge.Theresultsofstructuralanalysisindicatethatthesamplesinteredat800℃hasthecharacteristicsofgoodcrystallinity,narrowsizedistributionandlargespecificsurfaceareaatthesametime.Thedischargeexperimentsalsoindicatethatthissamplehasthebestelectrochemicalproperties,withthemaximumdischargecapacitiesof314.57and434.14mAh·g-1at200and300℃respectivelyandtheminimumcellinternalresistancesatbothtemperatures.

简介：Thisresearchexplorestheprospectoffabricatingaface-centeredcubic(fee)Ni-basealloycladding(Inconel690)onanfeeFe-basealloy(316Lstainless-steel)havingimprovedmechanicalpropertiesandreducedsensitivitytocorrosionthroughgrainboundaryandmicrostructureengineeringconceptsenabledbyadditivemanufacturing(AM)utilizingelectron-beampowderbedfusion(EPBF).TheuniquesolidificationandassociatedconstitutionalsupercoolingphenomenacharacteristicofEPBFpromotes[100]texturedandextendedcolumnargrainshavinglowerenergygrainboundariesasopposedtorandom,high-anglegrainboundaries,butnocoherent{111}twinboundariescharacteristicofconventionalthermo-mechanicallyprocessedfeemetalsandalloys,includingInconel690and316Lstainless-steel.Inadditionto[100]texturedgrains,columnargrainswereproducedbyEPBFfabricationofInconel690claddingson316Lstainless-steelsubstrates.Also,irregular2-3pimdiameter,lowenergysubgrainswereformedalongwithdislocationdensitiesvaryingfrom10^8to10^9cm^-2,andahomogeneousdistributionofCH3C6precipitates.Precipitateswereformedwithinthegrains(with-3μminterparticlespacing),butnotinthesubgrainorcolumnargrainboundaries.Theseinclusive,hierarchicalmicrostructuresproducedatensileyieldstrengthof0.527GPa,elongationof21%,andVickersmicroindentationhardnessof2.33GPafortheInconel690claddingincontrasttoatensileyieldstrengthof0.327GPa,elongationof53%,andVickersmicroindentationhardnessof1.78GPa,respectivelyforthewrought316Lstainlesssteelsubstrate.AgingofboththeInconel690claddingandthe316Lstainless-steelsubstrateat685℃for50hprecipitated623C6carbidesintheInconel690columnargrainboundaries,butnotinthelow-angle(andlowenergy)subgrainboundaries.Incontrast,Cr23C6carbidesprecipitatedinthe316Lstainless-steelgrainboundaries,butnotinthelowenergycoherent{111}twinboundaries.Consequently,the

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简介：Anovelfluorescentprobe9-(4-(1,2-diamine)benzene-N1-phenyl)acridine(DABPA)wassynthesizedforthedetectionofnitricoxide(NO)andcharacterizedbyIR,1H-NMRandEI-MSspectroscopy.Basedonaphotoelectrontransfermechanism,thefluorescenceintensitiesofDABPAwereinvestigatedwiththedifferentconcentrationsofNO.Undertheoptimalexperimentalconditions,thefluorescenceintensityofDABPAhadagoodlinearrelationship(R2=0.9977)withNOconcentrationintherangefrom1×10-7to1.5×10-6mol/Lwithadetectionlimitof1×10-8mol/L.ThecytotoxicityinducedbyDABPAwasevaluatedbytheMTT(3-(4,5-dimethylthiazol-2-yl)-2,5diphenyltetrazoliumbromide)assayforbiologicalapplication.Furthermore,theprobeDABPAhadalsobeensuccessfullyappliedtoreal-timeimageNOproducedinPC12cellsinthepresenceofL-arginine.