Please use this identifier to cite or link to this item: http://localhost:8081/jspui/handle/123456789/16545
Title: TRIBOLOGICAL STUDIES OF SILICON CARBIDE -TITANIUM CARBONITRIDE COMPOSITES
Authors: Kumar, B.V. Manoj
Keywords: SiC Carbideceramics;Titaniumcarbonitride;Fracturebehavior;Slidingwear
Issue Date: May-2017
Publisher: IIT ROORKEE
Abstract: SiC carbideceramicsarepromisingmaterialformechanical,specificallytribologicalapplicationsdue to theirhighhardnessandabilitytoretainstrengthathighertemperature.Thoughlowfracturetough- ness limitsitsapplication,useofcompositespreparedbyaddingvariousreinforcementsareattractive alternative.Inthiswork,fracturebehavior,slidingwearmechanismsanderosionwearmechanisms of Siliconcarbide-titaniumcarbonitridecompositesarereported.Fracturesurfacesofmonolithic silicon carbideshowedbrittlefracturebytransgranularmodeoffracturewhereastransgranularmode of fracturealongwithgrainpulloutandparticlepulloutwasobservedintitaniumcarbonitrideadded ceramic composite.Frictionandslidingwearpropertiesofcompositeswerestudiedunderunlu- bricated moderatelyhumidenvironmentatN,10N,20Nloadingconditions.Coefficientoffriction variedbetween0.2to0.4butlittleeffectofloadwasobserved.Significantreductioninslidingwear volumewasobservedbytheadditionoftitaniumnitrideunderhighloadingslidingwearconditions. At lowerloadsreductioninslidingwearvolumeinnotprominant.WornsurfaceanalysisandRaman spectroscopyrevealsinterplayoftwodifferentslidingwearmechanisms.Atlowerloadsmechanical brittle fractureisdominantwearmechanismbutathigherloadstribochemicalwearmechanismsare also prominent.Positiveeffectonerosionwearvolumeduetotitaniumcarbonitridepresenceisalso observed.Wornsurfaceanalysisshowsmechanicalfractureasdominantmechanismformaterial removal.WithTiCNcontentincrementplasticdeformationofcompositesisincreased.
URI: http://localhost:8081/jspui/handle/123456789/16545
metadata.dc.type: Other
Appears in Collections:MASTERS' THESES (MMD)

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