固體界面接觸換熱系數的實驗研究.pdf

1、大連理工大學碩士學位論文固體界面接觸換熱系數的實驗研究姓名：朱德才申請學位級別：碩士專業(yè)：材料學指導教師：張國梁張立文20070601固體界面接觸換熱系數的實驗研究ExperimentresearchonsolidinterfaceThermalContactConductanceCoefficientAbsfractDuetotheexistofmicrocosmicroughnessinthecontactsurfaces，when

2、twosolidinterfacescontacteachothertherealcontactale。9isonlyasmallfzactionoftllenominalcontactareaandtheyonlycontactinsomediscretemicroscopicasperitiesThisimperfectcontactbetweentheinterfacescausestheconstrictionofthebeat

3、flowandthesuddenchangeofthetemperaturebetweenthesolidinterfacesTKsphenomenoniscalledthermalcontactconductance口cC)，anditiswidelyusedanddevelopedinthefieldsofaerospace，metallurgy，chemicalengineering，nuclearenergymechanical

4、manufacture，microelectronicsetcSincetheresearchesonTCCbetweentwosolidinterfaceshavebecomemoreandmoreimportanceinvariousfields，itisnecessarytocarryoutfurtherresearchonitsproducingmechanismandthemaininfluencingfactorsAfter

5、reviewingrelativeliteraturesathomeandabroad，thepresentresearchanalyzesthemainfactorsinfluencingTCCn塢mainfactorsinfluencingtheheattransferbetweentwosolidinterfacesincludesthemicrogeometryofcontacting$Ul“faces，suchassurfac

6、eroughness，surfac君waviness。surface’srake；11塢situationofinterfacialpressure，suchascontactpressureandthe10edhistory；Theconditionoftemperature，suchasinterracialtemperature，theheatflow’sdensityanddirectionthechanginghistoryo

7、fthetemperature；thematerial’spropertysuchasthethermophysicspropertiesofthecontactmaterialhadthemedium；111econditionofcontactinterfaces，suchaswhetherithaveothermedium01“relativeslidebetweentheinterfacesConsideringalltheab

8、ovefactors，theresearchonTCCbetweenthesolidinterfacesistrulyacomplexoneThemeasurementoftheTCCcoefficientisemphasizedinthepresentresearchTakingthemaininfluencingfactorsonTCCintoconsiderationasetofselfdevelopedTCCexperiment

9、alsystemwasemployedandrelateddatacollectingandcomputingsoftwaresystemwasalsodevelopedn塢materialsanddieswhicharewidelyusedinmaterialprocessing，suchasaluminumalloyand5CrMnModiesteel，stainlesssteelandstainlesssteel，purecopp

10、erand3Cr2V8Walloysteel，GH4169and5CrMnModiesteel，TClland5CrMnModiesteelTAl5and5CrMnModiesteela∞usedassubjectsintheexperimentsTheTCChmv黜eachpairisanalyzedunderdifferentcontactpressure，differentinterracialtemperaturediffere