TiC耐磨復(fù)合材料設(shè)計(jì)及高溫摩擦磨損性能研究.pdf

1、合肥工業(yè)大學(xué)碩士學(xué)位論文TiC耐磨復(fù)合材料設(shè)計(jì)及高溫摩擦磨損性能研究姓名：張彪申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：吳玉程；解挺201204ThedesignofTiCwearresistantcompositesanditshightemperature‘wearandfrictionpropertiesABSTRACTThenewTiCbasedcermetsmaterialswasemployedinmanyfieldsmost

2、lvaswearresistancematerialsforitdisplayedagreatnumberofmerits，suchashighstrengthandhardness，wearcorruptionandhightemperatureresistance，goodchemicalstabilityandwearresistanceHowever，theobviousweaknessoftheTiC—basedcermets

3、materialswasbrittleness，thereforetheimprovementofthetenacitywasofgreatimportanceInthisstudy，agoodcombinationpropertyTiCbsedcermetwithsamplecompositionwaspreparedTheprocedureswasasfolloWs：Firstly，TiCbasedcermetswithdiffer

4、entcomponentwaspreparedbypowdermetallurgymethodThemicrostructureandcrosssectionimagesofthesampleswerecharacterizedbyscanningelectronmicroscopy(SEM)Themechanicalpropertiesweretestedbasedontheresearchofdensity，bendingstren

5、gthandhardnessexperimentsSecondly，theTiC—basedcermetspropertyoffrictionandwearwasinvestigatedunderthetemperatureof25℃，100℃，200℃and300℃，respectivelyThepropertyoffrictionandwearwasstudiedbysurfacemorphologyscanning(SEM)and

6、phaseanalysis(XRD)FinallythethermalshockresistancepropertyoftheTiCbasedcermetswasstudiedTheresultsshowedthatTiC—basedcermetshavegooddensityandbendingstrengthwiththeincreaseofthecontentofMo(Ni)Thewearamountwasverylowdurin

7、gthe2hoursweartestThebiggestamountinallthesampleswaslowerthan210x10。1zm3Itwasfoundthatthefrictioncoefficientwasnotchangedobviouslv0rthefrictionstabilitywasgoodThemajormechanismofTiC—basedcermetswas：theabrasivewearwasthed

8、rivingforceandtheadhesivewearwasalsoobservedinlowtemperatureTheoxidativewearoccurredwhenthetemperaturereached100℃Theoxidativewearandtheadhesivewearbecamethemainlywearmechanismsandotherformsofwearappearedwhenthetemperatur