Designation:C1495−16StandardTestMethodforEffectofSurfaceGrindingonFlexureStrengthofAdvancedCeramics1ThisstandardisissuedunderthefixeddesignationC1495;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheeffectofsurfacegrindingontheflexurestrengthofadvancedceramics.Surfacegrindingofanadvancedceramicmaterialcanintroducemicrocracksandotherchangesinthenearsurfacelayer,generallyreferredtoasdamage(seeFig.1andRef.(1)).2Suchdamagecanresultinachange—mostoftenadecrease—inflexurestrengthofthematerial.Thedegreeofchangeinflexurestrengthisdeterminedbyboththegrindingprocessandtheresponsecharacteristicsofthespecificceramicmaterial.Thismethodcomparestheflexurestrengthofanadvancedceramicmaterialafterapplicationofauser-specifiedsurfacegrindingprocesswiththebaselineflexurestrengthofthesamematerial.Thebaselineflexurestrengthisobtainedafterapplicationofasurfacegrindingprocessspecifiedinthisstandard.Thebaselineflexurestrengthisexpectedtoapproxi-matecloselytheinherentstrengthofthematerial.TheflexurestrengthismeasuredbymeansofASTMflexuretestmethods.1.2FlexuretestmethodsusedtodeterminetheeffectofsurfacegrindingareC1161TestMethodforFlexureStrengthofAdvancedCeramicsatAmbientTemperaturesandC1211TestMethodforFlexureStrengthofAdvancedCeramicsatElevatedTemperatures.1.3MaterialscoveredinthisstandardarethoseadvancedceramicsthatmeetcriteriaspecifiedinflexuretestingstandardsC1161andC1211.1.4Theflexuretestmethodssupportingthisstandard(C1161andC1211)requiretestspecimensthathavearectan-gularcrosssection,flatsurfaces,andthatarefabricatedwithspecificdimensionsandtolerances.Onlygrindingprocessesthatarecapableofgeneratingthespecifiedflatsurfaces,thatis,planargrindingmodes,aresuitableforevaluationbythismethod.Amongtheapplicablemachinetypesarehorizontala...
