1、Designation:D777521Standard 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 year of last revision.A number in parentheses
2、 indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This guide covers best practice for properties measure-ments on small(nonstandard)graphite specimens and require-ments for representing properties of the bulk
3、material.Thisguide is aimed specifically at measurements required ongraphites,where there may be constraints on the geometry orvolume of the test specimen,or both.The objective of thisguide is to provide advice on how the application of selectedstandards under noncompliant conditions can be tested f
4、orsuitability.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement 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 esta
5、blish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles f
6、or theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C559 Test Method for Bulk Density by Physical Measure-ments of Manufactured Carbon and Graphite ArticlesC
7、565 Test Methods for Tension Testing of Carbon andGraphite Mechanical MaterialsC611 Test Method for Electrical Resistivity of ManufacturedCarbon and Graphite Articles at Room TemperatureC651 Test Method for Flexural Strength of ManufacturedCarbon and GraphiteArticles Using Four-Point Loading atRoom
8、TemperatureC695 Test Method for Compressive Strength of Carbon andGraphiteC714 Test Method for Thermal Diffusivity of Carbon andGraphite by Thermal Pulse MethodC747 Test Method for Moduli of Elasticity and FundamentalFrequencies of Carbon and Graphite Materials by SonicResonanceC748 Test Method for
9、Rockwell Hardness of Graphite Ma-terialsC749 Test Method for Tensile Stress-Strain of Carbon andGraphiteC769 Test Method for Sonic Velocity in ManufacturedCarbon and Graphite Materials for Use in Obtaining anApproximate Value of Youngs ModulusC886 Test Method for Scleroscope Hardness Testing ofCarbo
10、n and Graphite MaterialsC1161 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 VibrationD7779 Test Method for Determination of Fracture Tough-ness of
11、Graphite at Ambient TemperatureD7972 Test Method for Flexural Strength of ManufacturedCarbon and Graphite Articles Using Three-Point Loadingat Room TemperatureD8289 Test Method for Tensile Strength Estimate by DiscCompression of Manufactured GraphiteD8356 Test Method for Sonic Velocity in Manufactur
12、edCarbons and Graphite Materials for use in ObtainingApproximate Elastic Constants:Youngs Modulus,ShearModulus,and Poissons RatioE228 Test Method for Linear Thermal Expansion of SolidMaterials With a Push-Rod DilatometerE1461 Test Method for Thermal Diffusivity by the FlashMethod3.Summary of Guide3.
13、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.1This guide is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct r
14、esponsibility of Subcom-mittee D02.F0 on Manufactured Carbon and Graphite Products.Current edition approved Nov.1,2021.Published November 2021.Originallyapproved in 2011.Last previous edition approved in 2016 as D7775 16.DOI:10.1520/D7775-21.2For referenced ASTM standards,visit the ASTM website,www.
15、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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C
16、700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1?Each of these standards has been developed with the objectiveof optimizing the method of measurement in the absence of anyconstraints o
