Alumina e matlafalitsoeng ke Zirconia

Likarolo tsa Alumina-zirconia li thatafatsoa ke phetoho e bakoang ke khatello ea maikutlo ea likaroloana tse ntle tsa tetragonal zirconia ho ba thata., lisebelisoa tse matla tse nang le matla a feteletseng le boima bo etsang hore li tšoanelehe bakeng sa lits'ebetso le libaka tse fapaneng.

Gelcasting e ne e sebelisetsoa ho etsa lisampole tsa ZTA, ka tlhokomelo e hlokolosi e lefshoang ho ntlafatsa boitokiso ba slurry ka mejaro e fapaneng e tiileng, ho bopa le ho theola sebopeho, ho omisa ka solvent (osmotic khahlano le ho omisa moea), le mekhoa ea pyrolysis le sintering ka 1550 le 1650 degC bakeng sa ho omisa. Botenya, thatafalo, ho thatafala ha fracture le liteko tsa matla a feto-fetohang li ile tsa etsoa ho lisampole tsohle tse entsoeng ka gelcasting..

E na le boima bo phahameng

Zirconia e tsitsitse alumina (ZTA) e loketse bakeng sa ho batla lits'ebetso ka lebaka la boima ba eona bo phahameng. E entsoe ka li-gel casting, ZTA e fana ka poloko ea litšenyehelo ho feta lisebelisoa tse ling tsa ceramic ha e ntse e ithorisa ka matla a phahameng. ZTA e ka mamella mocheso oa 1650 degC ha e ntse e le litšenyehelo ka lebaka la ho bokelloa ka phofo ea yttria-stabilised zirconia le alumina e kopantsoeng ho sebelisoa mekhoa ea ho lahla le ho sintering..

Li-ceramics tsa ZTA li hlahella ka lebaka la boima ba tsona bo tsotehang ka lebaka la phetoho ea tsona ho tloha ho tetragonal ho ea ho mekhahlelo ea monoclinic., ho eketsa boima ba fracture ka hoo e ka bang tse peli. Mochine ona o bakoa ke phapang pakeng tsa modulus ea bona ea elastic pakeng tsa mekhahlelo ea bona – zirconia le alumina ka ho latellana – ho bolelang hore libaka tsa khatello tse entsoeng nakong ea phetoho ea mohato li hlile li sebetsa ho fokotsa phatlalatso ea crack e etsang hore ZTA e be thata haholo ho feta lirafshoa tsa khale tsa alumina..

Zirconia-toughened alumina e ithorisa ka thata e phahameng le ho robeha ho thata ho feta AlN, hammoho le matla a phahameng a flexural ha a bapisoa le lisebelisoa tseo ka bobeli, ho etsa hore e be mokhethoa ea khabane bakeng sa lisebelisoa tsa motlakase tsa likoloi le tse tsitsitseng. Ho feta moo, ZTA e na le ts'oaetso e phahameng ea mocheso oa mocheso hammoho le thepa e ntle ea ho kenya motlakase, ho etsa hore e tshwanele tshebediso ya koloi le tshebediso tse ding tsa bongaka; ho feta moo, ZTA ha e bontše tšenyo ea DNA kapa liphello tsa kankere ka liseleng tsa mammalian, e fana ka ts'ebeliso e ka bang teng joalo ka lisebelisoa tsa ho kenya meno ka lebaka la thepa ea eona e ntle ea mochini le thepa ea biocompatibility.

E na le boima bo phahameng

Zirconia e tsitsitse alumina (ZTA), kapa alumina e thata ea zirconium, ke thepa ea ceramic e entsoeng ka bobeli alumina le zirconium e fanang ka thepa e ikhethang ea mochini joalo ka boima bo phahameng ba flexural., ho qhetsoha ho thata, elasticity, ho thatafala le ho tsubella. Karolelano pakeng tsa lisebelisoa tsena e ka fetoloa habonolo ho kopana le likopo tse khethehileng; Lihlahisoa tsa ZTA li feta tse entsoeng ka zirconia tse hloekileng ha li ntse li bitsa chelete e ngata.

Boitsebiso bona bo 'nile ba sebelisoa ka katleho ho fetola lihlooho tsa basali ba letheka le li-acetabular liner ka lebaka la biocompatibility le bokhoni ba nako e telele ba ho jara mojaro.. Leha ho le joalo, ho tshwaneleha ha yona ho tlameha ho hlahlojwa pele ka vivo.

ZTA e fihlela boima bo phahameng ka lebaka la sebopeho sa eona sa metastable tetragonal le matla a hatellang a tsoang ho matrix a alumina., moo khatello ea maikutlo e phahameng e bakang phetoho e thata; ke hore, zirconia e fetoha liforomo tsa monoclinic ha e tlas'a khatello ea matla ho tloha matrix a alumina, ho hlahisa matla a khatello a liehang kapa a emisang ho ata ha crack ka tsela eo ho hlahisa liphetoho tse thata tse thibelang ho ata ha crack..

ZTA e ithorisa ka matla a flexural a ntlafalitsoeng haholo 99% alumina ceramics ka lebaka la metastable tetragonal phase le alumina matrix, haholo ho feta taba ena. Leha ho le joalo, metsoako ea alumina-zirconia e ka fetoha brittle ka lebaka la homogeneity e tlase le ho kenngoa ha moea hammoho le ho kopana ha likaroloana tse lebisang ho bokooa ba lintlha le ho fokotseha ha matla a flexural. – leha ho le joalo ts'ebetso ea eona e feta lisebelisoa tsa khale tsa alumina ceramic lits'ebetsong tsa bongaka le tsa indasteri ka ho ts'oana.

E na le matla a phahameng

Zirconia toughened alumina ke thepa e tšoarellang haholo, e etsang hore e lokele dikopo tsa ho jara meroalo. E hlahisoa ka phetoho e bakoang ke khatello ea maikutlo ea likaroloana tse ntle tsa tetragonal zirconia hore e be alumina matrix., tlhahiso ea eona e fella ka kabo ea likaroloana tse ts'oanang haholo tse nang le matla a ikhethang le thepa e thata.

Ceramic e boetse e hanyetsana haholo le ho bola ha lik'hemik'hale. E loketse litšebeliso tse ngata ho kenyelletsa li-implants tsa bongaka le lisebelisoa tsa meno ka lebaka la bokhoni ba eona ba ho mamella ho pepesetsoa khafetsa marong a 'mele le lik'hemik'hale..

ZTA e boetse e hlahella ka ho hanyetsa mocheso oa eona oa mocheso, ha likaroloana tsa eona tsa zirconia li hasane ka har'a matrix a alumina li monya matla a mocheso le ho baka khatello ea maikutlo ho qoba ho phatloha. – sena se lumella ZTA ceramic hore e sebelisoe ka mokhoa o sireletsehileng bakeng sa lisebelisoa tsa mocheso o phahameng joalo ka likarolo tsa sebōpi le likarolo tsa enjene ea turbine ntle le ho beha kotsi kapa ho hlōleha..

ZTA e fumana matla a eona ho tsoa ho sebopeho sa eona le kabo ea nanoparticle, hammoho le ho tobetsa isostatic e chesang le sintering e tloaelehileng bakeng sa ho tšepahala ho eketsehileng. Bakeng sa ho feto-fetoha ha maemo, e ka boela ea hlahisoa ka mekhoa ea ho etsa li-sol-gel e fetolang limolek'hule hore e be lintho tse tiileng – ketsahalong ena ho kopanya phofo ea alumina le zirconia powders ka mokelikeli o kang oa gel o ka etsoang ka libopeho tse fapaneng pele o apehoa ka ontong ho fihlela pholiso e etsahetse pele e bōptjoa le ho omisoa hore e fane ka ZTA e nang le lisebelisoa tse phahameng tsa kristale e ntle hammoho le kristale e fetotsoeng., athomo, maemo a elektroniki a hlahisang ZTA e bonts'ang letsoalo le phahameng hammoho le kristale e fetotsoeng, linaha tsa athomo hammoho le meaho ea kristale e fetotsoeng, meaho ea kristale e fetotsoeng hammoho le kristale e fetotsoeng, maemo a athomo a bakang kristale e fetotsoeng, linaha tsa athomo bakeng sa ho tšepahala ho eketsehileng.

E na le khanyetso e phahameng ea mocheso

Lisebelisoa tsa ZTA li fana ka khanyetso e phahameng ea mocheso, ho etsa hore e loketse dikopo tse hlokang nako e telele. Ho feta moo, e hanyetsanang le kutu le matla a phahameng a ho feto-fetoha a etsa hore ZTA e tšoanelehe bakeng sa ho pepesehela nako e telele mocheso ho fihlela 1773 K – ho etsa hore e be khetho e babatsehang bakeng sa ho pepesehela lisebelisoa tsa nako e telele ho mocheso o phahameng.

Lipatlisiso tsa morao-rao li bontša hore zirconia e ntlafatsa thepa ea mechine ea alumina, ka ho qolleha boima ba eona le matla a ho tenyetseha. Phello ena e etsahala hobane likaroloana tsa zirconia li theha khatello ea kelello holim'a matrix ea alumina ha e le tlas'a khatello ea kelello; khatello ea kelello ena e thusa ho fokotsa ho ata ha crack ha ka nako e tšoanang e ntse e eketsa ho tiea ha fracture.

Lintlha tse ngata li ama ts'ebetso ea likarolo tsa ZTA, joalo ka mekhoa ea eona ea sintering le mocheso hammoho le palo ea zirconia e ekelitsoeng. Ka kakaretso, ho eketsa zirconia ho atisa ho ntlafatsa tshebetso; Leha ho le joalo zirconia e ngata haholo e ka fokotsa matla a eona a ho flexible hammoho le ho tiea ha fracture.

Alumina-zirconia-alumina e thata (SEO) ke thepa e tsoetseng pele ea tekheniki ea ceramic e sebelisoang lits'ebetsong tse fapaneng tsa indasteri. E entsoe ka alumina le zirconium oxide e kopantsoeng ke li-ceramic bond tse matlafatsang matla a flexural le ho tiea ha fracture ea thepa., AZT e etsa thepa e ntle haholo bakeng sa mechini e pepesehetseng mocheso o phahameng joalo ka lionto le libopi.