ASTM_C_1835_-_16.pdf

Designation:C183516Standard Classification forFiber Reinforced Silicon Carbide-Silicon Carbide(SiC-SiC)Composite Structures1This standard is issued under the fixed designation C1835;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 classification covers silicon carbide-silicon carbide(SiC-SiC)composite structures(flat plates,rectangular bars,round rods,and tubes)manufactured for structural compo-nents.The SiC-SiC composites consist of continuous siliconcarbide fibers in a silicon carbide matrix produced by fourdifferent matrix densification methods.1.2 The classification system provides a means of identify-ing and organizing different SiC-SiC composites,based on thefiber type,architecture class,matrix densification,physicalproperties,and mechanical properties.The system provides atop-level identification system for grouping different types ofSiC-SiC composites into different classes and provides a meansof identifying the general structure and properties of a givenSiC-SiC composite.It is meant to assist the ceramics commu-nity in developing,selecting,and using SiC-SiC compositeswith the appropriate composition,construction,and propertiesfor a specific application.1.3 The classification system produces a classification codefor a given SiC-SiC composite,which shows the type of fiber,reinforcement architecture,matrix type,fiber volume fraction,density,porosity,and tensile strength and modulus(roomtemperature).1.3.1 For example,Composites Classification Code,SC2-A2C-4D10-33a SiC-SiC composite material/component(SC2)with a 95%+polymer precursor(A)based siliconcarbide fiber in a 2D(2)fiber architecture with a CVI matrix(C),a fiber volume fraction of 45%(4=40 to 45%),a bulkdensity of 2.3 g/cc(D=2.0 to 2.5 g/cc),an apparent porosityof 12%(10=10 to 15%),an average ultimate tensile strengthof 350 MPa(3=300 to 399 MPa),and an average tensilemodulus of 380 GPa(3=300 to 399 GPa).1.4 This classification system is a top level identificationtool which uses a limited number of composite properties forhigh level classification.It is not meant to be a complete,detailed material specification,because it does not cover thefull range of composition,architecture,physical,mechanical,fabrication,and durability requirements commonly defined in afull design specification.Guide C1793 provides extensive anddetailed direction and guidance in preparing a complete mate-rial specification for a given SiC-SiC composite component.1.5 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.1.6 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:2C242 Terminology of Ceramic Whitewares and RelatedProductsC559 Test Method for Bulk Density by Physical Measure-ments of Manufactured Carbon and Graphite ArticlesC1039 Test Methods for Apparent Porosity,Apparent Spe-cific Gravity,and Bulk Density of Graphite ElectrodesC1145 Terminology of Advanced CeramicsC1198 Test Method for Dynamic Youngs Modulus,ShearModulus,and Poissons Ratio for Advanced Ceramics bySonic ResonanceC1259 Test Method for Dynamic Youngs Modulus,ShearModulus,and Poissons Ratio for Advanced Ceramics byImpulse Excitation of VibrationC1275 Test Method for Monotonic Tensile Behavior ofContinuous Fiber-Reinforced Advanced Ceramics withSolid Rectangular Cross-Section Test Specimens at Am-bient TemperatureC1773 Test Method for Monotonic Axial Tensile Behaviorof Continuous Fiber-ReinforcedAdvanced Ceramic Tubu-lar Test Specimens at Ambient TemperatureC1793 Guide for Development of Specifications for Fiber1This classification is under the jurisdiction of ASTM Committee C28 onAdvanced Ceramics and is the direct responsibility of Subcommittee C28.07 onCeramic Matrix Composites.Current edition approved Feb.1,2016.Published March 2016.DOI:10.1520/C1835-16.2For 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 Reinforced Silicon Carbide-Silicon Carbide CompositeStructures for Nuclear ApplicationsD3878 Terminology for Composite MaterialsD4850 Terminology Relating to Fabrics and Fabric TestMethodsD6507 Practice for Fiber Reinforcement Orientation Codesfor Composite MaterialsE6 Terminology Relating to Methods of Mechanical TestingE111