Designation:C1525−04(Reapproved2013)StandardTestMethodforDeterminationofThermalShockResistanceforAdvancedCeramicsbyWaterQuenching1ThisstandardisissuedunderthefixeddesignationC1525;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesthedeterminationoftheresistanceofadvancedceramicstothermalshockbywaterquenching.Themethodbuildsontheexperimentalprincipleofrapidquenchingofatestspecimenatanelevatedtemperatureinawaterbathatroomtemperature.Theeffectofthethermalshockisassessedbymeasuringthereductioninflexuralstrengthproducedbyrapidquenchingoftestspecimensheatedacrossarangeoftemperatures.Foraquantitativemeasurementofthermalshockresistance,acriticaltemperatureintervalisdeterminedbyareductioninthemeanflexuralstrengthofatleast30%.Thetestmethoddoesnotdeterminethermalstressesdevelopedasaresultofasteadystatetemperaturedifferenceswithinaceramicbodyorofthermalexpansionmismatchbetweenjoinedbodies.Thetestmethodisnotintendedtodeterminetheresistanceofaceramicmaterialtorepeatedshocks.Sincethedeterminationofthethermalshockresistanceisperformedbyevaluatingretainedstrength,themethodisnotsuitableforceramiccomponents;however,testspecimenscutfromcomponentsmaybeused.1.2Thetestmethodisintendedprimarilyfordensemono-lithicceramics,butmayalsobeapplicabletocertaincompos-itessuchaswhisker-orparticulate-reinforcedceramicmatrixcompositesthataremacroscopicallyhomogeneous.1.3ValuesexpressedinthisstandardtestmethodareinaccordancewiththeInternationalSystemofUnits(SI)andStandardIEEE/ASTMSI10.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C3...
