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CC复合材料ZrCSiC抗烧蚀涂层性能研究.docx

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CC复合材料ZrCSiC抗烧蚀涂层性能研究 Abstract:Inthisstudy,ZrCSiCanti-ablationcoatingswerepreparedonCCcompositematerials,andtheirperformancewastestedunderhigh-temperatureandhigh-speedairflowconditions.Theresultsshowedthattheanti-ablationperformanceoftheZrCSiCcoatingwassignificantlysuperiortothatoftheCCcompositematerial,indicatingthattheZrCSiCcoatinghaspracticalapplicationpotentialinaerospaceandotherhigh-temperaturefields. Keywords:CCcompositematerial;ZrCSiCanti-ablationcoating;high-temperatureandhigh-speedairflow;aerospace Introduction Compositematerialshaveexcellentspecificstrengthandspecificstiffness,andhavebeenwidelyusedinaerospace,military,andotherhigh-performancefields.However,intheharshhigh-temperatureandhigh-speedairflowenvironment,thesurfaceofthecompositematerialwillbeablated,whichseriouslyaffectsitscomprehensiveperformance.Therefore,itisnecessarytodevelopanti-ablationcoatingsforcompositematerials.Zirconiumcarbide(ZrC)isahigh-temperatureceramicmaterialwithgoodheatresistance,oxidation,andwearresistance.Siliconcarbide(SiC)isalsoanexcellenthigh-temperatureceramicmaterialwithhighheatresistance,hardness,andwearresistance.Coupledwiththeexcellentmechanicalandphysicalpropertiesofcarbon-carbon(CC)compositematerials,aZrCSiCanti-ablationcoatingbasedonZrCandSiCispreparedandappliedtoCCcompositematerialsinthisstudy. Experimentalsection 1.PreparationofZrCSiCanti-ablationcoatings TheZrCSiCanti-ablationcoatingwaspreparedbychemicalvapordeposition(CVD).Thespecificprocessisasfollows:theCCcompositematerialwasplacedinthereactionfurnace,andthetemperaturewasgraduallyincreasedto1200°C.Then,amixtureofZrCl4,SiCl4,andCH4wasintroducedintothefurnacebyacarriergas(argon),andthereactionwascarriedoutfor1hour.Afterthereactionwascompleted,itwasslowlycooledtoroomtemperaturetoobtaintheZrCSiCanti-ablationcoating. 2.CharacterizationoftheZrCSiCanti-ablationcoatings ThemorphologyandmicrostructureoftheZrCSiCanti-ablationcoatingswereobservedbyscanningelectronmicroscopy(SEM)andtransmissionelectronmicroscopy(TEM).Theph