第23卷第2期2023年2月过程工程学报TheChineseJournalofProcessEngineeringVol.23No.2Feb.2023Multiphasereactionfabricationandablationresistanceofcarbonfiber-reinforcedultra-hightemperatureceramicmatrixcompositesQianSUN1,2,HuifengZHANG1,3,ChuanbingHUANG1,3,ShouquanYU1,3,ShiruiYANG4,ShigeFANG4,WeigangZHANG1,2,3*1.InstituteofProcessEngineering,ChineseAcademyofSciences,Beijing100190,China2.SchoolofChemicalEngineering,UniversityofChineseAcademyofSciences,Beijing100049,China3.GanjiangInnovationAcademy,ChineseAcademyofSciences,Ganzhou,Jiangxi341119,China4.BeijingPowerMachineryInstitute,Beijing100074,ChinaAbstract:Inthiswork,toimprovetheablationresistanceandoxidationperformanceofcarbonfiber-reinforcedcarbonmatrix(C/C)compositeswidelyappliedasaerospacehigh-temperaturestructuralmaterialsinanoxidizingenvironmentabove2000℃,C/C-SiC-ZrB2-ZrCcompositeswerefabricatedbyhybridprocessesofZrB2slurryimpregnation,ZrC-SiCprecursorinfiltration-pyrolysisandreactivemeltinfiltrationwithaSi-Zr10eutecticalloy.Thematrixmicrostructureandtheevolutionmechanismofthepreparedcompositeswereinvestigatedindetailbyphasecomposition,microstructureanalysis,modelexperiments,andthermodynamiccalculation.Themechanicalpropertiesandablationresistanceofthecompositesweretestedbythree-pointbendingtestsandanatmosphericplasmatorch,respectively.Theresultsshowedthatinthecoolingstageafterinfiltration,insitusolid-liquidreactionbetweenZrCceramicsandresidualSimeltresultedintheformationofZrSi2andSiC,characterizingassuchsubmicronSiCparticlesevenlyembeddedintheZrC-ZrSi2binaryphasesandfinallygeneratedaZrC-ZrSi2-SiCcomplexmicro-region.Theobtainedcompositeswithadensityof3.18g/cm3andanopenporosityof2.77%showedaflexuralstrengthof121.46±13.77MPaandaflexuralmodulusof21.78±5.56GPa.Moreover,numerousfiberswerepulledoutandobviousinterfacialdebondingwasobservedinthefracturesection,indicatingthatthefailuremodeofthecompositeswasaductilefracture.Afterplasma-arcablationat2000℃for300s,theC/C-SiC-ZrB2-ZrCcompositesexhibitedexcellentultra-highte...
