alncr3c2成分对tic n基金属陶瓷组织和高温氧化性能影响word格式论文.docxVIP

alncr3c2成分对tic n基金属陶瓷组织和高温氧化性能影响word格式论文.docx

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alncr3c2成分对tic n基金属陶瓷组织和高温氧化性能影响word格式论文

AbstractInthiswork,researchdevelopmentandmovementtendencyofTi(C,N)-based cermetsandhightemperaturestructuralmaterialwerereviewed.andtheinfluencesof AlN/Cr3C2onthemicrostructureandmechanicalpropertiesofmetalandceramics materialshavealsobeensummarized.Ti(C,N)-basedcermetswithfourdifferent contentsofAlN/Cr3C2wereprepared.Bymeansofthermalgravityanalysis(TGA), metallographicmicroscope(OM),X-raydiffraction(XRD),scanningelectronmicroscope (SEM),TRStest,etc,theinfluenceofoxidizedtimeandtemperatureontheoxidizationof AlN/Cr3C2/Ti(C,N)-basedcermetswerestudied.Themicrostructureofthismaterialhad been also investigated inpresent paper.Afterbeingsintered,themicrostructureofTi(C,N)basedcermetswithAlN/Cr3C2 exhibitstheclassicalcore-rimmorphology:blackcorephase,graysurroundingphase, grayish-whitebinderphaseand????[Ni3(Al、Ti)]reinforced-phase. Theexistenceof ???makes the mechanical curves shows theincreasingafterawhile and then decreasingrule.Thesamplesarekeptatdifferentoxidizedtemperaturesof800℃,900℃and1000℃for3hours,6hoursand12hoursoxidizedtimeandtheoxidationincreasedweightoftheAlN/Cr3C2/Ti(C,N)-basedcermetshavebeencalculatedandwhichislessthanthesamples withoutAlN/Cr3C2.ItisindicatedfromtheTGAexperimentthatisoxidizingat1150℃for24hours,at50℃/minheatingratethatAlN/Cr3C2/Ti(C,N)-basedcermetsAandBhas 110.5%、108.5%rateofweighgain,whichislessthanthe117%rateofmassgainofTi(C,N)-based cermets withoutAlN/Cr3C2.Itisindicatedfromthemicroscopicanalysisoftheoxidizedfilmthat,whenoxidized above800℃,theoxidizedfilmsurfaceofAlN/Cr3C2/Ti(C,N)-basedcermetsAmainlyis composedbygranulatedAlNi3andTiO2,thicknessissmallerthan20μm;andtheoxidizedfilmsurfaceofAlN/Cr3C2/Ti(C,N)-basedcermetsBmainlyiscomposedbygranulatedAlNi3、TiO2andAl2O3.Ti(C,N)-basedcermetswith2.7%/4.8%(wt%)AlN/Cr3C2hadthehighestmechanical propertiesatroomtemperaturewhichweretransverserupturestrength1260MPaandhad the lowestliveweightgrowthafter isothermaloxidizing atthetemperaturebetween800℃and 1000℃whichwashelpfulfortheirusage athighertemperatu

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