Designation:C1793−15StandardGuideforDevelopmentofSpecificationsforFiberReinforcedSiliconCarbide-SiliconCarbideCompositeStructuresforNuclearApplications1ThisstandardisissuedunderthefixeddesignationC1793;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisdocumentisaguidetopreparingmaterialspecifi-cationsforsiliconcarbidefiber/siliconcarbidematrix(SiC-SiC)compositestructures(flatplates,rectangularbars,roundrods,andtubes)manufacturedspecificallyforstructuralcom-ponentsandforfuelcladdinginnuclearreactorcoreapplica-tions.TheSiC-SiCcompositesconsistofsiliconcarbidefibersinasiliconcarbidematrixproducedbyliquidinfiltration/pyrolysisand/orbychemicalvaporinfiltration.1.2ThisguideprovidesdirectionandguidanceforthedevelopmentofamaterialspecificationforaspecificSiC-SiCcompositecomponentorproductfornuclearreactorapplica-tions.Theguideconsiderscompositeconstituentsandstructure,physicalandchemicalproperties,mechanicalproperties,thermalproperties,performancedurability,methodsoftesting,materialsandfabricationprocessing,andqualityassurance.TheSiC-SiCcompositematerialsconsideredherewouldbesuitablefornuclearreactorcoreapplicationswhereneutronirradiation-induceddamageanddimensionalchangesaresignificantdesignconsiderations.(1-8)21.3Thecomponentmaterialspecificationistobedevelopedbythedesigner/purchaser/user.Thedesigner/purchaser/usershalldefineandspecifyindetailanyandallapplication-specificrequirementsfordesign,manufacturing,performance,andqualityassuranceoftheceramiccompositecomponent.Additionalspecificationitemsforaspecificcomponent,be-yondthoselistedinthisguide,mayberequiredbasedonintendeduse,suchasgeometrictolerances,permeability,bonding,sealing,attachment,andsystemintegration.1.4ThisguideisspecificallyfocusedonSiC-SiCcompositecomponentsandstructureswithflatplate,so...
