ASTM_C_1793_-_15.pdf

Designation:C179315Standard Guide forDevelopment of Specifications for Fiber Reinforced SiliconCarbide-Silicon Carbide Composite Structures for NuclearApplications1This standard is issued under the fixed designation C1793;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This document is a guide to preparing material specifi-cations for silicon carbide fiber/silicon carbide matrix(SiC-SiC)composite structures(flat plates,rectangular bars,roundrods,and tubes)manufactured specifically for structural com-ponents and for fuel cladding in nuclear reactor core applica-tions.The SiC-SiC composites consist of silicon carbide fibersin a silicon carbide matrix produced by liquid infiltration/pyrolysis and/or by chemical vapor infiltration.1.2 This guide provides direction and guidance for thedevelopment of a material specification for a specific SiC-SiCcomposite component or product for nuclear reactor applica-tions.The guide considers composite constituents andstructure,physical and chemical properties,mechanicalproperties,thermal properties,performance durability,methodsof testing,materials and fabrication processing,and qualityassurance.The SiC-SiC composite materials considered herewould be suitable for nuclear reactor core applications whereneutron irradiation-induced damage and dimensional changesare significant design considerations.(1-8)21.3 The component material specification is to be developedby the designer/purchaser/user.The designer/purchaser/usershall define and specify in detail any and all application-specific requirements for design,manufacturing,performance,and quality assurance of the ceramic composite component.Additional specification items for a specific component,be-yond those listed in this guide,may be required based onintended use,such as geometric tolerances,permeability,bonding,sealing,attachment,and system integration.1.4 This guide is specifically focused on SiC-SiC compositecomponents and structures with flat plate,solid rectangular bar,solid round rod,and tubular geometries.1.5 This guide may also be applicable to the development ofspecifications for SiC-SiC composites used for other structuralapplications,discounting the nuclear-specific chemical purityand irradiation behavior factors.1.6 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3C242 Terminology of Ceramic Whitewares and RelatedProductsC559 Test Method for Bulk Density by Physical Measure-ments of Manufactured Carbon and Graphite ArticlesC577 Test Method for Permeability of RefractoriesC611 Test Method for Electrical Resistivity of ManufacturedCarbon and Graphite Articles at Room TemperatureC625 Practice for Reporting Irradiation Results on GraphiteC714 Test Method for Thermal Diffusivity of Carbon andGraphite by Thermal Pulse MethodC769 Test Method for Sonic Velocity in ManufacturedCarbon and Graphite Materials for Use in ObtainingYoungs ModulusC816 Test Method for Sulfur in Graphite by Combustion-Iodometric Titration MethodC838 Test Method for Bulk Density of As-ManufacturedCarbon and Graphite ShapesC1039 Test Methods for Apparent Porosity,Apparent Spe-cific Gravity,and Bulk Density of Graphite ElectrodesC1145 Terminology of Advanced Ceramics1This guide is under the jurisdiction of ASTM Committee C28 on AdvancedCeramics and is the direct responsibility of Subcommittee C28.07 on CeramicMatrix Composites.Current edition approved Sept.1,2015.Published November 2015.DOI:10.1520/C1793-152The boldface numbers in parentheses refer to the list of references at the end ofthis standard.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 C1179 Test Method for Oxidation Mass Loss of Manufac-tured Carbon and Graphite Materials in AirC1198 Test Method for Dynamic Youngs Modulus,ShearModulus,and Poissons Ratio for Advanced Ceramics bySonic ResonanceC1233 Practice for Determining Equivalent Boron Contentsof Nuclear MaterialsC1239 Practice for Reporting Uniaxial Strength Data andEstimating Weibull Distribution Parameters for AdvancedCeramicsC1259 Test Method for Dynamic Youngs Modulus,ShearModulus,and Poissons Rat