Zirconia, tseem hu ua zirconium dioxide (ZrO2), yog ntau yam khoom siv ceramic uas nthuav tawm cov khoom siv zoo heev, ua rau nws muaj txiaj ntsig zoo rau ntau yam kev lag luam thiab biomedical. Nws cov khoom siv kho tshuab raug ntaus nqi rau nws cov qauv siv lead ua tshwj xeeb thiab muaj peev xwm ua rau muaj kev hloov pauv hauv qee yam xwm txheej.
Hardness thiab hnav tsis kam
Zirconia muaj npe nrov rau nws qhov tshwj xeeb hardness, uas yog piv rau tungsten carbide. Qhov siab tawv no ua rau nws zoo heev hnav tsis kam, ua rau nws tsim nyog rau cov ntawv thov uas cov ntaub ntawv raug rau abrasive hnav, xws li hauv cov cuab yeej txiav thiab cov khoom siv kho mob. Zirconia lub hardness yog tshwm sim los ntawm nws cov qauv siv lead ua, uas tiv thaiv deformation nyob rau hauv kev siv kev ntxhov siab.
Lub zog thiab Toughness
Zirconia nthuav tawm siab flexural lub zog thiab toughness, ua rau nws cov khoom muaj zog rau kev siv cov qauv. Lub xub ntiag ntawm tej yam stabilizing oxides nyob rau hauv zirconia ceramics pab txhim khu nws toughness los ntawm kev txhawb ib tug transformation toughening mechanism. Cov txheej txheem no cuam tshuam nrog kev ntxhov siab vim kev hloov pauv ntawm tetragonal theem mus rau theem monoclinic, nqus lub zog thiab tiv thaiv kev tawg tawg.
Fracture Toughness
Lub pob txha toughness ntawm zirconia yog qhov siab dua li cov tsoos ceramics zoo li alumina. Cov cuab yeej no tseem ceeb heev rau kev tiv thaiv kev puas tsuaj loj hauv cov khoom siv. Zirconia muaj peev xwm ua rau muaj kev ntxhov siab vim kev hloov pauv theem ua rau nws txhim kho pob txha tawv tawv, ua rau nws nyiam cov khoom siv hauv kev thov siv qhov kev tiv thaiv tawg yog qhov tseem ceeb.
Young's Modulus
Zirconia muaj lub siab Young's modulus, qhia txog nws qhov tawv thiab muaj peev xwm tiv thaiv deformation nyob rau hauv ib qho kev thov load. Cov cuab yeej no ua rau nws tsim nyog rau cov ntawv thov uas xav tau qhov kev ruaj ntseg thiab kev ua haujlwm zoo. Lub siab modulus ntawm zirconia kuj pab txhawb rau nws cov hauj lwm zoo nyob rau hauv kev kho hniav daim ntaub ntawv, qhov twg nws yog siv raws li ib tug muaj zog thiab check hloov rau tej yam ntuj tso hniav.
Hauv kev xaus, zirconia qhov tshwj xeeb ntawm cov khoom siv kho tshuab ua rau nws yog cov khoom siv hauv ntau hom xws li engineering, kho hniav, thiab biomedicine. Nws qhov tshwj xeeb ua ke ntawm cov khoom ua haujlwm zirconia ua ntau yam ceramic nrog ntau daim ntawv thov hauv qhov xav tau ib puag ncig.
