bythreedimensionalbraidedmethod,andsuppliedbyNanjingInstituteofGlassFiber(PeopleRepublicofChina).Thefibervolumefractionwas.Inthepresentexperiment,isothermal/isobaricchemicalvaporinfiltration(ICVI)wasemployedtoprepareC/SiCcompositewhichhasbeendescribedelsewhereindetails[-].InICVIprocess,athinlayerofpyrolyticcarbonwaspre-depositedonthesurfaceofcarbonfiberasinterfaciallayerwithbutaneat℃priortodensification.Methytrichosilane(MTS,CHSiCl)wasusedfordepositionofSiCandwascarriedbybubblinghydrogenintothereactionchamber.Typicalconditionsbeingusedfordepositionare℃,ahydrogentoMTSratioof,andapressureofafewkPa.Argonwasusedasdilutegastoslowdownthechemicalreactionrateofdeposition.Afterthedensificationofthecompositeswasfinished,theC/SiCcompositeswerecoatedwithsilicon-molybdenumalloy(Si-Mo)meltattemperatureof~℃invacuumfor.h...OxidationtestsTheoxidationtestswereconductedat~℃inair.Thethermalshockexperimentswereconductedasfollows:thesampleswereplacedintothef加。