Kev ntsuas ceev
Cov ntaub ntawv los ntawm lub pycnometer rau kev ntsuas qhov ceev ntawm cov qauv pristine (Brass thiab Zirconia) thiab cov qauv degraded khaws cia ntawm 300 ° C thiab 600 ° C.
Cov qauv siv ceramic tau tuav qhov ntsuas qhov sib xws rau cov qauv pristine thiab degraded (300 ° C thiab 600 ° C) cov qauv.Qhov kev coj cwj pwm no xav tau los ntawm Zirconia vim yog qhov sib txuas ntawm electrovalent ntawm cov khoom qiv rau nws cov tshuaj lom neeg thiab cov qauv kev ruaj ntseg.
Zirconia raws li cov ntaub ntawv raug suav hais tias yog qee cov oxides ruaj khov tshaj plaws thiab txawm tias tau pom tias maj mam decompose ntawm qhov kub siab ze rau 1700 ° C.Yog li ntawd, siv cov ceramic centerpost rau cov ntawv thov kub tuaj yeem yog qhov kev xaiv zoo, txawm hais tias muaj pes tsawg leeg ntawm sintered.
Scanning Electron Microscopy
■ Daim duab 3
Sab laug qhia cov qauv hlau ntawm pristine thiab 600 ° C thiab sab xis qhia ceramic pristine thiab 600 ° C
Daim duab peb qhia txog qhov kev daws teeb meem siab ntawm cov polished thiab etched pristine thiab degraded kuaj.Raws li tuaj yeem pom, tsis muaj pov thawj ntawm kev degradation hauv cov qauv ceramic (sab tes duab duab).Cov qauv muaj tib lub cev qauv uas qiv rau kev ruaj ntseg ntawm cov qauv ceramic ntawm qhov kub thiab txias.Ntawm qhov tod tes, peb pom qhov hloov pauv loj hauv qhov chaw morphology ntawm cov qauv tooj dag degraded.Qhov saum npoo ntawm tus qauv tooj dag yog degraded qhia hnyav oxidation.Lub cev tsim ntawm oxide txheej kuj tseem ua rau muaj kev hloov pauv ntawm qhov ntom ntawm cov qauv tooj dag.