基質(zhì)微細(xì)化及添加劑對鋁鋯碳滑板顯微結(jié)構(gòu)及性能的影響.pdf

1、X975“6猷參蔫舞垮撥學(xué)校代碼：10488學(xué)號：∞10加50如肇碩士學(xué)位論文題目基質(zhì)微細(xì)化及添加劑對鋁鋯碳滑板顯微結(jié)構(gòu)及性能的影響專業(yè)研究方向姓名導(dǎo)師材料學(xué)耐火材料邵榮丹顧華志教授定稿日期：2006年4月30日第1I頁武漢科技大學(xué)碩士學(xué)位論文AbstractA1203Zr02Cslideplateisakindoffunctionalrefractorywhichisbuiltinthebottomofladletocontrolth

2、eoutflowofliquidsteelfromtheladleSoitrequireschampionstrength，thermalshockresistance，corrodibilityresistance，antioxidationandabradabilityandsoonAccordingtotherequirementsabove，thispaperstudiedcarbonmaterials，siliconaddit

3、ivesandsiliconsize，superfineA1203andburntfactors，whichcouldinfluencethestructureandpropertiesofAl203一Zr02一CmaterialsinlabconditionsInadditionboroncompoundadditivesanddefiniteA1powderwereblendedintothematerialsteviewtheir

4、effectonthepropertiesofsinteredmaterialsAllspecimensweresinteredfordifferentexperimentalintentionsDuringallsinteringprocess，precautionwastakentoavoidoxidationofthespecimensbyplacingtheminsaggerfilled謝thcokebreezeWhenthes

5、interedspecimenshadbeencooledtoomtemperaturetheirapparentporositybulkdensitycoldcrushingstrengthandhightemperaturebendingstrengthweredetermined，respectivelyBesidespropertiesabove，mercuryintrusionmethodWasusedtodeterminet

6、heaperturedistribution，andantioxidationweretestedinthermogravimetricfurnace，andSiCwhiskergrowninspecimensduringsinteringwereobservedbySEM，SOdidthemicrostructureofthespecimensafteroxidationtestAnderosionresistantWasexamin

7、edbyinductionfurnaceThen，conclusionsareobtainedasfollows：CarbonblackplaysanimportantroleinimprovingthepropertiesofA1203一Zr02CmaterialsIthassmallergranularityandbetterdispersionpropertyleadingtoeasierin—situreactionwitlls

8、ilicontoSiCcrystalwhiskerwhichiswell—grownandCanfillintheporeSOwellthattherateofmicroporelessthanlgmincreasesapparently2)Intherangeofchoosedsinteringtemperatures，anumberofSiCcrystalwhiskerswithbetterqualitywereobservedin

9、thespecimenssinteredinrelativelowersinteringtemperature，whichmakethephysicalpropertiesofthespecimenssinteredinlowertemperaturearebetterthanthatinhighertemperatureInaddition，thelongerthesoakingtime，thebetterthephysicalpro

10、pertieswhenspecimensaresinteredinthelowertemperatureHoweverthepropertiesarenotimprovedobviouslyoncesoakingtimeexceeds8hours3)Siliconpowder淅m(xù)relativelymuchnessandsmallersize，Canreacteffectively晰tllnormalcarbonformingmorea

11、ndbetterSiCcrystalwhiskerConsequentlythephysicalproperties，antioxidationandabradabilityafteroxidatedaremoresuperioralongwithmoreSipowdersaddedinthematerials鍆A1203micropowderCanfillporesandacceleratesinteringprocessremark