简介：ThenatureofbondinginthetitlecompoundshasbeenstudiedbyusingCASSCFandFOCItechniques.ThegroundstatesofPtCandPtNarefoundtobe1Σ+and2Πstatearisingprimarilyfrom:…1σ22σ21π41δ43σ2and…1σ22σ21π41δ43σ22π1configurationrespectivelyandbothofwhichformtriplebond(ones,twoπbonds),butthebondofPtCismuchstrongerthanthatofPtN.

简介：Theelevatedtemperaturetensileexperimentshavebeencarriedoutonthemagnesiumalloyandresultsindicatethatthemagnesiumalloyhasexcellentsuperplasticproperty.Gleebe-1500testingmachinewasusedinthediffusionbondingexperimentonthesuperplasticmagnesiumalloy.Then,theshearstrengthofthejointsunderdifferentconditionsisobtainedthroughsheartestingandtheoptimumprocessingparametersforthediffusionbondingareachieved.Bymetallurgicalmicroscopeandscanningelectronmicroscope(SEM),itisrevealedthatthemicromechanismofdiffusionbondingistheslideofgrainboundariescausedbythegrowthofgrainsandatomdiffusionofthesuperplasticmagnesiumalloy.

简介：Theinfluenceofsiliconsliceflatnessonbondingtechnologyandtherelationbetweenaforeignparticleandresultingbubblearequantitativelypresentedbytheelastictheory.ItisdemonstratedexperimentallybyX-raydoublecrystaldiffractometryandinfraredimager.

简介：TheZrcoatingwasdepositedontitaniumsurfaceusingthemagnetronsputteringtechnique.EffectsofZrcoatingonmicrostructureandmechanicalpropertiesofporcelainfiredtotitaniumhavebeeninvestigated.Theresultsshowthatinterdiffusionofelementsoccursduringporcelainfiring,andtheZrcoatingcaneffectivelyprotecttitaniumsurfacefromexcessoxidation.ThestrengthofbondzonewithZrcoatingdepositedfor1hourreaches29.7MPa,whichhasincreasedby26.4%ascomparedwiththatofbondzonewithoutcoating(23.5MPa).

简介：Afteraconciseintroductionofhydrogenbondingeffectsinsolute-soluteandsolute-solventbonding,thedesignofpolymericadsorbentsbasedonhydrogenbonding,selectivityinadsorptionthroughhydrogenbonding,andcharacterizationofhydrogenbondinginadsorptionandseparationwerereviewedwith28references.

简介：Theceramicsettingbindersobtainedbymeansoftherawmixmechano-chemicalprocessing(mechanicaldispersionandchemicalinteractionprocessescombination),usedforbondingrefractoryconcretes,becomemoreavailablewithasubsequentincreasedinterestintheirpropertiesbecausetheydevelopinitialstrengthduringaheatupoftheunitswithin8-10h,incontrastto24hafterplacementforhighAl2O3cements(HAC).Thisstrengthdevelopmentenableshightemperatureprocessingunitstoberelinedwithminimumturnaroundtime,thusprovidingafavoredcost/performanceratio.Thepresentpaperidentifiesthepredominantphosphatephasesresponsiblefordevelopinggoodmechanical-strengthpropertiesofzirconiaandaluminaconcretesbondedwithmechano-chemicalbinders.Itsetsoutthecolloidandcrystallinephasesresultedfrominterphaseinteractionthatprovidethebasisforhighconcentratedbondingsuspensions(HCBS)technologyusefultotherefractoryindustry.

简介：Thevacuumdiffusionbondingoftitaniumalloytotin-bronzehasbeenstudiedandthefeasibilityandappropriateprocessingparametershavebeeninvestigated.Themaximumtensilestrengthofthejointsis168MPa,andafirmjointisobtained.ThemicrostructureofdiffusionbondedjointhasbeenobservedbySEM.X-rayandEPMA,andthemainfactorsaffectingdiffusionbondinghavebeenanalyzed.TheintermetalliccompoundsTi2CuandTiCuwereformedneartheinterface.Thewidthandquantityoftheintermetalliccompoundincreaseswiththeincreaseofthebondingtime.Theformationoftheintermetalliccompoundsresultsinembrittlementofthejointandthepoorjointproperties.

简介：在二固体之间的一个结合的接口上的非线性的边界条件一纵或砍水平嘘，在正常发生下面的波浪被探索。由使用秒顺序不安方法，非线性的春天模型严厉地在小厚度的限制被开发到波长比率。数字结果同意很好，准确答案由连续边界条件获得了。为纵的波浪的非线性的春天模型被测量钢或铝底层的楔形的结合结构的非线性验证。试验性的结果表明上述模型是相当精确的，当到粘合剂的adherend的阻抗比率增加，模型变得更精确。

简介：ThehydrogenbondpercentageanditstemperaturedependenceofthethreeTPUsamplessynthesizedfrompolytetrahydrofuran,4,4-diphenylmethanediisocyanate,N-methyldiethanolamineor1,4-butanediolwerestudiedbymeansofIRthermalanalysis.TheenthalpyandtheentropyofthehydrogenbonddissociationweredeterminedbytheVantHoffplot.

简介：Theadsorptionisothermsofcaffeinefromaqueoussolutionontothreehydrogendonatingadsorbents-hydroxypolystyrene,polystryene-azo-pyrogallol,andD72resin-weremeasured.TheadsorptionenthalpiescalculatedfromtheisothermsaccordingtotheClausisu-Clapeyronequationwere-24-36kJ/mol,-32-37kJ/mol,and-19-24kJ/molrespectively.Thesevaluesimpliedthattheadsorptionprocesseswerebasedonhydrogenbonding.Furthermore.themechanismoftheadsorptionofcaffeineontoD72resinwasstudiedbyIRspectraandthesmallmolecularmodelexperiments,andtheresultsshowedthattheadsorptionofcaffeineontohydrogendonatingadsorbentswasbasedonhydrogenbonding.

简介：Twohydrogen-bondingadsorbents-macroporouscrosslinkedpoly(P-nitrostyrene)andpoly(p-vinylbenzylamide)-weresynthesized,andtheadsorptionpropertyofphenolfromcyclohexanesolutionontotheadsorbentswasstudied,ThedifferentialadsorptionheastsforvariedadsorptioncapacitiescalculatedfromtheadsorptionisothermsaccordingtotheClaperyron-Clausiusequationlayintherangeofhydrogenbondenergy(8-50kJ/mol),Theadsorptioncapaccityofo-nitrophenolincyclohexanewasmochlessthanthatofphenolunderthesamecondition.Theadsorptioncapacityofphenolfromcyclohexaneontopolyacrylonitrilewasmuchlessthanthatontopoly(p-nitrostyrene)orpoly(p-vinylbenzylamide),Alltheseresultsrevealedthatadsorptionofphenolfromcyclohexanebypoly(p-nitrostyrene)orpoly(p-vinylbenzylamide)isbasedonhydrogen-bonding.

简介：Factorsinfluencingbondingstrengthoflaminatedbamboostripslumber(LBSL)wereinvestigatedinthispaper.Inordertofindanoptimizedtechnology,thispaperinvestigatedhowthethicknessofbamboostrips,theassemblyorientationofbamboocurtain,thetypeofadhesives,aswellascouplingagenttreatmentofbamboocurtainaffectedthebondingstrength.Thefollowingconclusionsweredrawn:1)Thethinnerthethicknessofthebamboostrips,thebiggerthebondingstrengthofLBSL;2)Theassemblyor...

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简介：BondingofAl2O3tocuisperformeddirectlyusingTifoilattemperatureof1273K.Themicrostructureofthejointinterfaceisinuestigatedthroughscanningelectronmicroscope（SEM）,electron.probemicroanalysis（EPMA）andX-raydiffraction（XRD）.theeffectoftheinitialtifoilthicknessonthereactionlayerthicknessandthejointStrengthareinvestigated.

简介：Wehavestudiedtheelectronic,bondingandenergeticcharacteristicsoftheFe-Sibinarysystemusingthetight-bondingextendedHuckelmethod.AmongtheFe-Sibinarycompounds,FeSihasthemostsymmetricgeometricarrangementinthecrystalstructure.Italsopossessesthelargestcohesiveenergyperatom.ThiscorrelatestothefactthatFeSiisthemoststablecongruently-meltingcompoundinthebulkphasediagram.Anestimateofinteractionenergiesbetweendifferentatomsisalsogiven.

简介：Possibilitiesforenhancementofcatalyticreactionratebycombiningphasetransfercatalysisandhydrogenbondingofthecatalystwiththesubstrateandreagentwerestudied.Aphasetransfercatalystlibrarywithsixtypolystyrene-supportedquaternaryammoniumsaltcatalystswassynthesized.ThereductionofacetophenonebyNaBH4wasusedastheprobingreactiontoselectouttheostactivecatalystinthelibrarybyusingiterativemethod.whichwasthegel-typetriethanolamineaminsatingstronglyasicanionexchangeresinwiththecrosslinkingdegereeof2%Ahydrogenbondingassistedcatalyticmechanismwasproposedtoexplainthehighcatalyticactivityofthecatalyst.

简介：Theliquid-filmsolution-diffusionbondingofZCuBe2.5alloyswasconductedusingCu-basedalloypowders.Thetensilestrengthofthebondingtimedecreasesandtheinterfacemigrationvelocityincreasesbondingtime,thethicknessofdiffusionlayerincreaseswiththeincreaseoftemperaturegradient,andthistendencybecomesmoreremarkablewiththeprolongingofbondingtime.

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).

简介：结构，机械，电子，并且NaZnSb的结合的性质和阶段转变基于abinitio飞机波浪pseudopotential密度用概括坡度近似被探索功能的theory.With伪泛音Debye模型的帮助，我们探查Gr??????舀?

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