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简介：１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅＧａＩｎＡｓＳｂａｎｄＡｌＧａＡｓＳｂｑｕａｔｅｒｎａｒｙａｌｏｙｓｍａｔｃｈｅｄｔｏＧａＳｂｓｕｂｓｔｒａｔｅｓｈａｖｅａｇｒｅａｔｐｏｔｅｎｔｉａｌｉｔｙｆｏｒｌｏｎｇｗａｖｅｌｅｎｇｔｈｏｐｔｏｅｌｅｃｔｒ...

简介：Anewtypecontrolmethodinfrictionweldingissuggestedinthispa-per,thatiscompositivecontrolmethodoffrictiontorqueandfrictiontime,itcalledMtcontrolmethodforshort.TheprincipleofMtcontrolmethodanditsfeatureareconciselyexplained.

简介：Ｓｔｕｄｙｏｎｃｏｎｔａｃｔｌｅｓｓｕｌｔｒａｓｏｎｉｃｓｅｎｓｏｒａｎｄｓｅａｍｔｒａｃｋｉｎｇ￥ＨｏｕＷｅｎｋａｏ；ＨｕＳｈｅｎｇｓｕｎａｎｄＺｈａｏＪｉａｒｕｉＴｉａｎｊｉｎＵｎｉｖｅｒｓｉｔｙＺｈａｎｇＳｈａｏｂｉｎ（ＱｉｎｇＨｕａＵｎｉｖｅ...

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

简介：Byuseofmicro-DTAtechniqueaswellasambientandhightemperatureX-rayanalysisthephasediagramofNaCl-CaCl2hasbeenchecked.Itis.asimpleeutecticsystemwithasolidsolubilityinthesodiumchlorideside.Theeutecticpointisat773K,49mol%NaCl.Theexperimentalresults,especiallythoseoftheX-raydiffractionstudieshaveshowedthattheincongruentcompound4NaCl-CaCl2doesnotexistintheNaCl-CaCl2system.

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简介：alloying，热处理，并且在Cu-Cr-Zr合金的表演上的塑料工作的影响被调查。猛抛的阶段作为Cr，Cu_(51)Zr_(14)和Cu_5Zr被描绘。Cu-Cr-Zr合金在答案处理，老化处理，和塑料变丑以后表明高力量和高电导率的联合性质。当增加Zrin时，Cr的Precipitationcourse是影响Cu-Cr-Zr合金的传导性的主要因素合金调整在Cr和矩阵之间的取向关系，并且趋于在变丑以后增加年老的Cu-Cr-Zr合金的传导性。

简介：ThecompositionandstructureofcyclicsulfoxidederivativePd(Ⅱ)complexwereinvestigated.Thecoordinatednumberwasstudiedwithslopemethod.Thecoordinationnumberis2inloweracidity,butitis3inhigheracidity.Fourmethods,UV(ultraviolet)spectra,FrIR(Fouriertransforminfrared)spectra,1H-NMR(nuclearmagneticresonance)spectra,and13C-NMRspectra,wereusedtodeterminethecoordinatedatomincomplex.PdiscoordinatedwithOandSatominS=Ogroupinloweraciditymedia.Theconversionofcoordinationbondappearswithanincreasingtime.PdiscoordinatedwithSatominS=Ogroupinhigheraciditymedia,andinter-ligand-transferreactionoccurs.

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简介：Laserbeamweldingisanewtechniqueforthefoodcanmaking.Thisresearchstudiedtheweldingtechnologyandparametersforthetin-platecanandtheirinfluencesonweldingspeedandquality,investigatedthemicrostructureandpropertiesoftheweld,analyseddistributionoftinintheweldmetalandcarriedouttheflangingtestofthecanbody.Theresultsshowthatlaserweld-ingofthecanbodyischaracterizedbyhighweldingspeed,fineappearance,goodqualityandstableandreliableprocess.Thistechnologycanfulfillthere-quirementsofcanmaking.

简介：在这研究，听电影的二种类型被准备，一使用用多弧离子小块地(MAIP)的有一个在里面飞机S过滤器的过滤cathodic弧血浆(大页书写纸)技术，和其它，和两个在一样的参数下面扔了。质地，坚硬，粗糙，tribological和听电影的二种类型的电气化学的腐蚀行为的比较被给。FCAP技术获得的听电影被发现高度一致、光滑、macroparticle免费。听电影由有的大页书写纸扔了一(111)比较喜欢取向，当有时，在这些电影的质地都没由MAIP扔。在低负担下面，二种听涂层有很不同穿机制；有的大页书写纸的电影一更低与MAIP技术扔的听电影相比穿率和磨擦系数。大页书写纸的听电影的稠密、没有洞的结构能有效地在腐蚀测试期间从底层避免听电影的雪崩。

简介：Thispapertheoreticallyanalyzedthejetfieldoflasersprayingmethodofcoaxialtype.Theresultsthatweregotbymeansofanalyzingthemodelofaxisymmetricturbulentjetfieldshowedthatjetfieldconsistsoftwoparts,flowdevelopingregionandfullydevelopedflowregion.Inflowdevelop-ingregionexistsapotentialcoreregionofaconstantinitialjetvelocity.Usingπtheorem,wehavegottherelationsofu_m∝C(1/x)andb∝x,andtheformthatvelocitydistributionhasseriessolutionofTollmientype.Thispaperprovidestheo-reticalbasisfornozzledesign,choiceofsprayingconditionsandexplanationofsprayingphenomenaoflasersprayingmethod.

简介：ＳｔｕｄｙｏｎＧｄＡｌＤｙＳｙｓｔｅｍＭａｇｎｅｔｉｃＲｅｆｒｉｇｅｒａｔｉｏｎＭａｔｅｒｉａｌｓＣｈａｎｇＸｉｕｍｉｎ，ＹａｎＪｕｎｌｉａｎ（常秀敏）（闫俊联）ＢｅｉｊｉｎｇＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｆｏｒＮｏｎｆｅｒｒ...

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简介：Crackopeningdisplacement(COD)wasappliedtocharacterizethefractureinitiationofthetoughhighdensitypolyethylene.Normalsinglesidenotchedthree-pointbendspecimensandsilicarubberreplicatechniqueswereusedtostudythecharacteristicCODofhigh-densitypolyethylenepipeanditsbutt-fusionjointsincludingtheweldfusionzoneandheataffectedzoneatdifferenttemperaturefrom-78℃to20℃.TestingresultsshowthatthecharacteristicCODappearstodependonthestructuralfeaturesthataredeterminedbyweldingprocessandthetestingtemperature.Asthetemperatureislowered,thecharacteristicCODofallzonesstudieddecreases.Becausetheweldingprocesssignificantlychangessomestructuralfeatureofthematerial,characteristicCODoftheweldfusionzoneisthesmallestoneamongthoseofthethreezones.TheresultscanbeusedfortheengineeringdesignandfailureanalysisofHDPEpipe.