1、Designation:D777511(Reapproved 2015)An American National StandardStandard Guide forMeasurements on Small Graphite Specimens1This standard is issued under the fixed designation D7775;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、 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 guide covers best practice for properties measure-ments on small(nonstandard)graphite specimens and require-m
3、ents for representing properties of the bulk material.Thisguide is aimed specifically at measurements required onnuclear graphites,where there may be constraints on thegeometry or volume of the test specimen,or both.1.2 The values stated in SI units are to be regarded asstandard.No other units of me
4、asurement are included in thisstandard.1.3 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 limi
5、tations prior to use.2.Referenced Documents2.1 ASTM Standards:2C559 Test Method for Bulk Density by Physical Measure-ments of Manufactured Carbon and Graphite ArticlesC565 Test Methods for Tension Testing of Carbon andGraphite Mechanical MaterialsC611 Test Method for Electrical Resistivity of Manufa
6、cturedCarbon and Graphite Articles at Room TemperatureC651 Test Method for Flexural Strength of ManufacturedCarbon and GraphiteArticles Using Four-Point Loading atRoom TemperatureC695 Test Method for Compressive Strength of Carbon andGraphiteC714 Test Method for Thermal Diffusivity of Carbon andGrap
7、hite by Thermal Pulse MethodC747 Test Method for Moduli of Elasticity and FundamentalFrequencies of Carbon and Graphite Materials by SonicResonanceC748 Test Method for Rockwell Hardness of Graphite Ma-terialsC749 Test Method for Tensile Stress-Strain of Carbon andGraphiteC769 Test Method for Sonic V
8、elocity in ManufacturedCarbon and Graphite Materials for Use in ObtainingYoungs ModulusC781 Practice for Testing Graphite and Boronated GraphiteMaterials for High-Temperature Gas-Cooled Nuclear Re-actor ComponentsC886 Test Method for Scleroscope Hardness Testing ofCarbon and Graphite MaterialsC1161
9、Test Method for Flexural Strength of AdvancedCeramics at Ambient TemperatureC1259 Test Method for Dynamic Youngs Modulus,ShearModulus,and Poissons Ratio for Advanced Ceramics byImpulse Excitation of VibrationE228 Test Method for Linear Thermal Expansion of SolidMaterials With a Push-Rod DilatometerE
10、1461 Test Method for Thermal Diffusivity by the FlashMethod3.Summary of Guide3.1 There is currently a suite of ASTM standards(see 2.1)that can be applied to graphite covering a range of physical,mechanical,electrical and thermal property measurements.Each of these standards has been developed with t
11、he objectiveof optimizing the method of measurement in the absence of anyconstraints on test specimen production.Without exception,these standards specify limits on the ratio between test speci-men dimensions and coke and filler grain sizes or prescribe testspecimen geometries or size ranges,or both
12、.The defaultposition for any user should be to follow these standardsexactly as described.However,in some applications,availabletest material or experiment design constraints on test specimensizes may result in noncompliance.The objective of this guideis to provide advice on how the application of s
13、electedstandards under noncompliant conditions can be tested forsuitability.The ultimate objective is to provide guidance on theuse of each of the ASTM standards listed.The 2011 issue ofthis guide addresses eight standards:Test Method C559 forBulk Density by Physical Measurement of ManufacturedCarbo
14、n and Graphite Articles,Test Method C611 for ElectricalResistivity of Manufactured Carbon and Graphite Articles at1This guide is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.F0 on Manufactured Carb
15、on and Graphite Products.Current edition approved June 1,2015.Published July 2015.Originally approvedin 2011.Last previous edition approved in 2011 as D7775 111.DOI:10.1520/D7775-11R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.o
16、rg.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 Room Temperature,Test Method C747 for Moduli of Elasticityand Fundamental Frequencies of Carbon and Graphite Mate-rials by Sonic Resonance,Test Method C769 for SonicVelocity in Manufactured Carbon and Graphite Materials forUse in Obtaining Youngs Modulus,Test Method C749
