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1、上海交通大学硕士学位论文牙科可切削氧化锆/磷酸镧复相陶瓷实验研究姓名：王申申请学位级别：硕士专业：口腔临床医学（口腔修复学）指导教师：张保卫20070401上海交通大学医学院2004级硕士学位论文1/2抗弯强度200.90±14.46MPa，断裂韧性2.1±0.12MPam。3．氧化锆/磷酸镧复相陶瓷烧结后两相结构之间为弱结合，没有发生明显化学反应。4．氧化锆/磷酸镧复相陶瓷断裂形式以晶粒去除为主，磷酸镧在两相体系中的断裂呈层片状形式。5．磷酸镧作为第二相引入氧化锆中,材料力学性能有所下降,但可提高氧化锆/磷酸镧复相陶瓷的可切削性能。结论：新型牙科氧化锆/磷酸镧复相陶瓷切
2、削陶瓷材料机械性能优良，可加工性能良好。关键词：氧化锆，磷酸镧，机械性能，可加工性能，牙科切削机上海交通大学医学院2004级硕士学位论文EXPERIMENTALSTUDYONDENTALMACHINABLEZrO2/LaPO4CERAMICABSTRACTObjective:Zirconiaceramicshavegoodmechanicalproperties,aestheticappearanceandbiocompatibilitybyitstransformationtougheningmechanism.Itisoneofthemostpromisingdent
3、almaterials.ButZirconiumoxideishardtobemachininged.ItisextremelydifficultandexpensivetobecutonCAD/CAMmachine.BycombiningZrO2with,thispaperstudiesonmakinganewmachinableceramicbyaddingLaPO4intoZrO2.Bychangingthepercentageoftwosubstance,addingstabilizator,andanalyzingthematerial’smechanicalp
4、ropertyandfractureform,wepromisetomakeanewmachinableZrO2/LaPO4ceramicfordentalapplication.Methods:Byinvestigatingtherelativedensity,threebendstrength,fracturetoughness,HVhardness,impresscrackextendingandmicrostructureof上海交通大学医学院2004级硕士学位论文sinteredblock,weconfirmthetechnicsofZrO2/LaPO4cera
5、mics.Results:1.ZrO2/LaPO4canbesinteredwellat1580℃byaddingstabilizator.2.The10%,20%,30%,40%LaPO4contentgroupswhenadding1%,3%,5%,7%stabilizerrespectively,itsflexurestrengthandfracturetoughnessreachedtomaximumvalueas590.36±45.67MPa,568.91±28.721/2MPa,405.90±18.06MPa,200.90±14.46MPaand6.62±0.
6、51MPam1/21/21/23.79±0.13MPam,2.46±0.08MPam,2.1±0.12MPam.3.ThereisnoreactionbetweenZrO2andLaPO4,whichindicateweekbondingbetweenthesetowmaterial.4.ThemainformintheprocessoffractureofZrO2/LaPO4ceramicisthegrainelimination,Multi-layeredfractureoccurreswithinLaPO4granules.5.Withincreasedamount
7、ofLaPO4,thefinalproduct’smechanicalpropertydeclinesandmachinablecharacteristicincreases.Conclusion:NewZrO2/LaPO4machinableceramichavegoodmechanicalpropertyandmachinablity.KEYWORDS:ZrO2,LaPO4,mechanicalproperty,machinability，cad/cam上海交通大学医学院2004级硕士学位论文上海交通大学学位论文原创性声明
