渗硅工艺制备ZrB2-SiC涂层的微观结构与抗氧化性能.pdf

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1、第28卷第10期无机材料学报Vb1．28No．102013年10月JournalofInorganicMaterialsOct．．2O13ArticleID：1000·324X(2013)10-1158·05DoI：10．3724／SP．J．1077．2013．13253ZrB2-SiCCoatingsPreparedbyVaporandLiquidSiliconInfiltrationMethods：MicrostructureandOxidationResistancePropertyZHOUHai．Jun，一，FENGQian，KANYan．M

2、eiI．，GAOLe，DONGShao．Ming'(1．StructuralCeramicsandCompositesEngineeringResearchCenter,ShanghaiInstituteofCeramics，ChineseAcademyofSciences，Shanghai200050，China；2．StateKeyLaboratoryofHighPerformanceCeramicsandSuperfineMicrostructure，ShanghaiInstituteofCeramics，ChineseAcademyofSci

3、ences，Shanghai200050；3．AnalysisandTestingCenter,DonghuaUniversity,Shanghai201620，China)Abstract：Novelzirconiumdiboride-siliconcarbide(ZrB2一SiC)coatingswerepreparedbyvaporsiliconinfiltration(VSI)andliquidsiliconinfiltration(LSI)，respectively．Thestaticoxidationresistancepropertie

4、softhesecoatingswereevaluatedandtheirmicrostmctureevolutionduringoxidationwasstudied．ItshowedthattheVSIcoatinghadbetteroxidationresistancethanLSI．AcompactoxidescalewasformedontheVSIcoating，whichstronglysuppressedfur—theroxidationdamageduringthetesting．Thepooroxidationresistance

5、oftheLSIcoatingcouldbemainlyattributedtomicro．cracksandresidualsilicon．Keywords：zirconiumboride；compositematerials；oxidationresistancepropertiesWithexcellentthermalconductivity,highstrength，(CVD)andPackCementation．ZrB2-SiCcoatingcouldbenon—brittlefracturebehaviorand1owdensity,c

6、arbonfibereficientlyproducedthroughplasmaspraying．HoweveLreinforeedcomposites，suchasC／C，C／SiC，arebyfarthethisneedshighcostequipmentsandthecoatingpropertyismostpotentialmaterialsforhightemperaturestructuralgreatlyinfluencedbythestartingpowdercharacteristics．applicationsindiffere

7、ntfieldst1-5JCVDismostfrequentlyusedforcoatingpreparation．It．However,thepooroxi—dationresistanceofcarbonfiberreinforcementsposesagivesthebestresultsintermsofcoatingdensityandcoat—seriousdrawbacktotheapplicationofthematerials【。．Asingdesign．Nevertheless，thetechnicaldificultyforZr

8、B2aresult，carbonfiberreinforcedcompositesshowalowdepos