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CeramicMaterials
SchoolofmaterialsscienceandengineeringCeramicMaterialsSchoolofm1Introduction1.1whatisCeramics?Aproductobtainedthroughtheactionoffireuponearthymaterials→Inorganic,nonmetallicsolids,usuallyoxides,nitrides,orcarbides.Ceramicsaretypicallycrystallineinnatureandarecompoundsformedbetweenmetallicandnon-metallicelements.2Companyname1Introduction1.1whatisCera1.2TypicalpropertiesModeratedensityLowelectricalconductivityinsulatorsStrongcompressivestrength>>tensilestrengthLow-moderatethermalconductivityinsulators
Brittle
HardVeryhighhardnessrawmaterialsareplentifulandinexpensive
manyceramicstransparenttolight
translucent,oropaque
Highelasticmodulus-greaterthanmetals
ExcellentwearresistancebecauseofhighcompressivestrengthandhardnessGoodresistancetochemicalattack3Companyname1.2TypicalpropertiesModeMainlimitation:
?verybrittleandtheyareflawsensitive
?
Cracksandotherflawsarealwayspresent4CompanynameMainlimitation:4Companyname1.3Classification?advancedceramics
alsoknownasengineeringortechnicalceramics,refertomaterialswhichexhibitsuperiormechanicalproperties,corrosion/oxidationresistance,andthermal,electrical,opticalormagneticproperties.5Companyname1.3Classification?advancedc6Companyname6Companyname7Companyname7Companyname2NatureofCeramics8Companyname2NatureofCeramics8Companyn2.1PorosityandDensity9Companyname2.1PorosityandDensity9Compa10Companyname10Companyname11Companyname11Companyname2.2StructureofCeramicsCrystalphase,glassphase,pore12Companyname2.2StructureofCeramicsCryst13Companyname13Companyname3CeramicProcessing14Companyname3CeramicProcessing14CompanyChemicalProcesses:Sol-gelprocessingsolid-phasesinteringliquid-phasesinteringmechanicalprocessingPhysicalvapordeposition(PVD)Chemicalvapordeposition(CVD)15CompanynameChemicalProcesses:Sol-gelpr16Companyname16CompanynameAcommontechniqueforconsolidatingceramicpowdersAtomicdiffusionmasstransfer(particlestoopenspaces)
tremendousamountofshrinkagecracking,distortion&/orresidualstressesReactionformednonoxideceramicsSinteringofceramicpowders17CompanynameAcommontechniqueforconsoliPropertiesofCeramics18CompanynamePropertiesofCeramics18Compan19Companyname19CompanynameMechanicalproperties
20CompanynameMechanicalproperties20CompanStrong:highcompressivestrength
HardInelastic:
donotbendlikemetals→highelasticmodulusFracturetoughness:dependsonthegeometryofboththeobjectandthecrack,theappliedstress,andthelengthofthecrackChemicalproperty:durable(resistanttocorrosion)Physicalproperties:lowdensityandhighmeltingpoint
structuralapplicationsWeakness:
brittle→composites→toimprovethetoughness21CompanynameStrong:highcompressivestrenApplicationsofCeramics22CompanynameApplicationsofCeramics22Comp23Companyname23CompanynameGlassesAglass(amorphousmaterial)isquitedifferentfromacrystallinemetalorceramic.Inaglass,thereisnolong-rangecrystallineorder.GlasstransitionThetemperatureabovewhichtheglassbecomessoftandviscousenoughtoworkisrelatedtotheglasstransitiontemperature,Tg.Belowtheglasstransitiontemperature,thematerialisrelativelyhardandstiff;aboveit,itbecomesmoreviscous.24CompanynameGlassesGlasstransition24Compa25Companyname25Companyname26Companyname26Companyname27Companyname27Companyname28Companyname28Companyname29Companyname29Companyname30Companyname30Companyname寫在最后成功的基礎(chǔ)在于好的學(xué)習(xí)習(xí)慣Thefoundationofsuccessliesingoodhabits31寫在最后成功的基礎(chǔ)在于好的學(xué)習(xí)習(xí)慣31謝謝大家榮幸這一路，與你同行It'SAnHonorToWalkWithYouAllTheWay講師：XXXXXXXX年XX月XX日
32謝謝大家講師：XXXXXX32CeramicMaterials
SchoolofmaterialsscienceandengineeringCeramicMaterialsSchoolofm1Introduction1.1whatisCeramics?Aproductobtainedthroughtheactionoffireuponearthymaterials→Inorganic,nonmetallicsolids,usuallyoxides,nitrides,orcarbides.Ceramicsaretypicallycrystallineinnatureandarecompoundsformedbetweenmetallicandnon-metallicelements.34Companyname1Introduction1.1whatisCera1.2TypicalpropertiesModeratedensityLowelectricalconductivityinsulatorsStrongcompressivestrength>>tensilestrengthLow-moderatethermalconductivityinsulators
Brittle
HardVeryhighhardnessrawmaterialsareplentifulandinexpensive
manyceramicstransparenttolight
translucent,oropaque
Highelasticmodulus-greaterthanmetals
ExcellentwearresistancebecauseofhighcompressivestrengthandhardnessGoodresistancetochemicalattack35Companyname1.2TypicalpropertiesModeMainlimitation:
?verybrittleandtheyareflawsensitive
?
Cracksandotherflawsarealwayspresent36CompanynameMainlimitation:4Companyname1.3Classification?advancedceramics
alsoknownasengineeringortechnicalceramics,refertomaterialswhichexhibitsuperiormechanicalproperties,corrosion/oxidationresistance,andthermal,electrical,opticalormagneticproperties.37Companyname1.3Classification?advancedc38Companyname6Companyname39Companyname7Companyname2NatureofCeramics40Companyname2NatureofCeramics8Companyn2.1PorosityandDensity41Companyname2.1PorosityandDensity9Compa42Companyname10Companyname43Companyname11Companyname2.2StructureofCeramicsCrystalphase,glassphase,pore44Companyname2.2StructureofCeramicsCryst45Companyname13Companyname3CeramicProcessing46Companyname3CeramicProcessing14CompanyChemicalProcesses:Sol-gelprocessingsolid-phasesinteringliquid-phasesinteringmechanicalprocessingPhysicalvapordeposition(PVD)Chemicalvapordeposition(CVD)47CompanynameChemicalProcesses:Sol-gelpr48Companyname16CompanynameAcommontechniqueforconsolidatingceramicpowdersAtomicdiffusionmasstransfer(particlestoopenspaces)
tremendousamountofshrinkagecracking,distortion&/orresidualstressesReactionformednonoxideceramicsSinteringofceramicpowders49CompanynameAcommontechniqueforconsoliPropertiesofCeramics50CompanynamePropertiesofCeramics18Compan51Companyname19CompanynameMechanicalproperties
52CompanynameMechanicalproperties20CompanStrong:highcompressivestrength
HardInelastic:
donotbendlikemetals→highelasticmodulusFracturetoughness:dependsonthegeometryofboththeobjectandthecrack,theappliedstress,andthelengthofthecrackChemicalproperty:durable(resistanttocorrosion)Physicalproperties:lowdensityandhighmeltingpoint
structuralapplicationsWeakness:
brittle→composites→toimprovethetoughness53CompanynameStrong:highcompressivestrenApplicationsofCeramics54CompanynameApplicationsofCeramics22Comp55Companyname23Comp
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