原位燒結型耐磨鋯剛玉材料的研制.pdf

1、大連輕工業(yè)學院碩士學位論文原位燒結型耐磨鋯剛玉材料的研制姓名：王守平申請學位級別：碩士專業(yè)：材料學指導教師：馬鐵居20030401ABSTRACTToughenedcorundumforitshighwearabilityisadoptedandusedbymenfromthekindsofindustriesByf打themosteffectivewaytotoughencorundumisthatbeingtoughenedbyzi

2、reoniaButthewayislimitedtosomeapplicationfieldsbecauseofitshighcostandcomplicatedprocessesIntheitemweutilizedareactionprincipleofthesinteredzirconiacorundumatthehi曲temperatureandworkedoutcombinationandcompoundsofthemater

3、ialByconditiontests，theeffectsofultrafinepowderthekindsandamountofadditivesandsinteredtemperatureonthepropertiesofmaterialWaSresearchedFurthermorewealsodesignedprocessrouteandparametersInthemiddletest，wehadobtainedthesin

4、teredcompositematerialofzirconiacorundumsuccessfullyTheheattreatmentsystemisdeterminedbyexpansioncurvenletruedensityandrelativedensityofsamplesweremeaSuredbyvacuumgravitymethodSEMWaSusedtoobservethemicrostructureandanaly

5、sisthemorphologyCrystallinephaseswasdetectedbyXRDThewearabilityWastestedinthepracticallyproduction111eresultsshowthat：thesinteredzirconiacorundumwhichrelativedensityreaches97％CanbeobtainedwhenⅡ一A1203andZrSi04powders、^ri血

6、theparticlesizelessthan10lamareusedaSrowmaterials。themetricratioofthemiSover125andtobesinteredatthetemperature1580～1595“CThewearabilityofthesinteredzirconiacorundumiShigherthanthatofnormalcorundumover30％Especiallythewear

7、abilityofthematerialshowsmoreexcellentwhenusedunderhotconditionThesinteredmaterialhaSotheradvantagesaSthese：thelowercost，themoresimplifyingproducingtechnologyanditsuitstorealizeindustrialproducingKeywords：Corundum，Zircon