zirconia toughened alumina ke ceramic e tsoetseng pele e fanang ka matla le ho tiea ho feta alumina. Sesebelisoa sena se hlahisoa ka aluminium oxide e kopantsoeng le zirconium oxide e tsitsitsoeng ho sebelisoa yttria., ceria, kapa magnesia e le li-stabilizers.Keketso ea lisebelisoa tsena e etsa hore ZTA e se ke ea robeha 'me e eketsa matla a eona a ho fetoha le ho hatella., mmoho le ho mamella mocheso o phahameng.
E na le biocompatible
zirconia toughened alumina ke biocompatible le phetisetso e ntle ea tšepe e sa hloekang lisebelisoa tsa bongaka, ho sebetsa joalo ka mokhoa o sebetsang oa ho hanyetsa ho bola. E khona ho mamella mocheso o phahameng ha e ntse e tšoarella haholo, ZTA e boetse e na le khanyetso e ntle ea ho apara e hlokahalang bakeng sa ts'ebetso ea nako e telele 'me e na le sebaka se thibelang likhohlano ho etsa hore ho be bonolo ho hloekisa.; holim'a moo, khanyetso ea eona e phahameng ea ho roala e etsa hore e be khetho e loketseng bakeng sa li-valve.
ZTA e ithorisa ka karo-karolelano e phahameng ea matla ho boima, ka bongata ba eona feela 4.3 g/cm3. E fana ka botsitso bo botle ba mocheso 'me e ka etsoa habonolo ka lisebelisoa tse tloaelehileng tsa ho sila. Mocheso oa eona o phahameng ka ho fetisisa oa ho sebetsa oa 1923 K le coefficient ea ho atolosa mocheso ka bobeli li ka har'a mamello bakeng sa tšebeliso ea mechine e tloaelehileng, mme e na le likarohano tsa Poisson tsa 0.26, 130ksi ya matla a ho koba, le tekanyo ea elasticity ea 47x106psi.
Alumina matrix e matlafatsoa ka zirconia le strontium aluminate ho eketsa ho tiea le ho hanyetsa abrasion ea thepa ena e entsoeng ka motsoako oa bioactive., ha e ntse e sebetsa joalo ka bohlasoa ba crack tip, hammoho le ho eketsa ho tiea ha fracture ka mekhoa ea ho fetola le ho hasana. Ho feta moo, bioactivity ea eona e khothalletsa ho thehoa ha masapo ha ka nako e le 'ngoe e ntlafatsa osseointegration ea li-implants tsa meno..
Strontium aluminate e fana ka khanyetso e ntle ea kutu, ha zirconia e matlafatsa ho tiea ha eona ka ho khothaletsa ho tiea ha fracture. Ho feta moo, zirconia e sebetsa e le insulator ea motlakase e etsang hore thepa ena e tšoanelehe haholo bakeng sa lits'ebetso tsa matsoho ho qoba ho aha tefiso e tsitsitseng..
Zirconia e ka fetoloa ka li-oxide tse fapaneng ho e matlafatsa le ho e tiisa, ho akarelletsa le yttria, ceria le magnesia joalo ka lisebelisoa tse tloaelehileng tsa ho tsitsisa. Alumina-zirconia e tsitsitseng (CSZ) e loketse ka ho khetheha bakeng sa tikoloho ea metsi ka lebaka la ho hanyetsa ha eona khahlanong le tlhaselo ea metsi a molek'hule hammoho le matla a phahameng a flexural le ho tiea..
Alumina-stabilized zirconia e ka sebetsa e le phetisetso e sebetsang ea litšepe tsa tšepe tse kentsoeng meno., ho sebeletsa ho hokahanya meqhaka le meno a kenngoeng ka ho mamella maemo a phahameng a khatello ea maikutlo. Litšepe tsa tšepe li ne li hahiloe ka tloaelo ho tloha titanium; tsena li ne li e-na le litšobotsi tse ntle tsa mochini empa li sa khahlehe hantle; tsa ceramic li ntlafalitse litšoaneleho tsa botle hammoho le ho tšoarella ho eketsehileng.
E thata
Phetoho ea toughening ke ts'ebetso eo ka eona ho eketsa zirconia ea yttria-stabilised ho matrix ea alumina ho eketsang ho tiea ha fracture le matla a ceramic.. Keketseho ena e fella ka matla a maholo a ho feto-fetoha ha maemo, ho qhetsoha ho thata, kabo ea boholo ba lijo-thollo le ho hanyetsa mocheso oa mocheso oa zirconia-alumina ceramics; Ho feta moo, ba ithorisa ka ho hanyetsa mocheso o phahameng oa mocheso o etsang hore e be lisebelisoa tse loketseng bakeng sa ts'ebetso ea li-valve ntle le litla-morao kapa karabelo e kotsi 'meleng ea batho..
Ho eketsoa ha yttria-stabilised zirconia (YSZ) ho matrix a alumina e fana ka matla a eketsehileng le ho tiea ka theko e khahlehang ha e bapisoa le YSZ e hloekileng. Ho feta moo, thepa ena e bontša e babatsehang ho apara ho hanyetsa, dielectric e tlase e sa fetohe mme ha e brittle ho feta metsoako e meng ea alumina; Ho feta moo, e feta tse ling tsa zirconium oxide ceramics ka ho tšoarella haholoanyane lits'ebetsong tsa mocheso o phahameng tse nang le thepa e ntle ea ho hanyetsa lik'hemik'hale..
zirconia toughened alumina ke sesebelisoa se loketseng ho etsa li-blades tse sehang ka lebaka la ho thatafala ha tsona, ho hanana le ho roala, botsitso ba mocheso le ho hanyetsa ho ferekana – litšoaneleho tseo le tsona li etsang hore e be theko e tlase haholo ho feta lisebelisoa tse ling tsa ho itšeha.
ZTA e hlahisoa ka mokhoa oa ho lahla li-gel, ho kopanyelletsang ho kopanya alumina e phofshoana le zirconia e tsitsitseng ea yttria hammoho e le ho etsa slurry., ebe o bopa ntho ena hore e be libopeho tse lakatsehang ka ho sebelisa hlobo. Ka mor'a ho omisa ka metsi a desiccant, boitsebiso bona bo feta ka pyrolysis le sintering pele qetellong e fetoha karolo ea sebopeho sa eona sa ho qetela.
Zirconia-toughened sinter e bonts'a thepa e ntle ea mochini, ho kenyeletsa le ho qhetsoha ho thata, matla a flexural le elasticity. Mocheso o phahameng ka ho fetisisa oa ho sebetsa ke 1923 K le coefficient ea katoloso ea mocheso e eme ho 8.1x 10-6 C-1 ha karo-karolelano ea Poisson e eme 0.26 'me matla a eona a flexural a ka fihla ho 130ksi.
zirconia toughened alumina e ka hlahisoa ka sintering ea tšimo ea motlakase kapa sintering ea khatello e phahameng, mekhoa e 'meli e hlahisang lirafshoa tse teteaneng haholo le tse thata tse nang le likristale tse ntle. Motlakase oa sintering o pepesetsa lisebelisoa tse tala ho motlakase ho fihlela o bonesa, e lebisang ho densification ka mocheso o fokotsehileng haholo oa sintering; sintering e nang le khatello e phahameng e sebelisa phofshoana e sintered e phahameng e etsang sebopeho sa kristale ha ka nako e le 'ngoe e fetola boemo ba eona ba athomo le elektroniki..
Ha e khone ho mamella mocheso
ZTA ke thepa e tsoetseng pele e kopanyang matla le ho roala ha zirconia le thepa ea mocheso ea alumina bakeng sa ts'ebeliso e fapaneng ea lisebelisoa tsa ho seha., li-ceramics tse sebetsang hantle le tse ling. Ka lebaka la motsoako ona, e fana ka nako e telele ho feta leha e le efe e le 'ngoe, hammoho le ho ba matla ho feta ka bobeli tungsten carbide le boron nitride – e loketseng lits'ebetso tse hlokang ho tiea le ho tšoarella.
ZTA ceramic e tsejoa ka matla a eona a holimo, mmoho le ho hanana le tlhaselo ya dikhemikhale le ho hohla. Ka matla a phahameng a khatello le a feto-fetohang a fetang a alumina le litekanyetso tse tlase tsa katoloso ea mocheso., e etsa khetho e ntle haholo ea lisebelisoa bakeng sa likarolo tse hlokang mekhoa ea ho pholisa joalo ka li-fan tse futhumatsang. Ho feta moo, Mehaho ea mochini ea ZTA e thibela ho phatloha kapa ho robeha, ho etsa hore e be e 'ngoe ea lisebelisoa tsa ceramic tse matla ka ho fetisisa le tse tšoarellang ka ho fetisisa' marakeng kajeno.
Li-composites tsa Ceramic li etsoa ho sebelisoa motsoako oa mekhoa e tloaelehileng ea sintering le e chesang ea isostatic ho li hlahisa.. Sena se tiisa hore lisebelisoa tsohle li kopantsoe ka botlalo ntle le likheo tse ka senyang botšepehi ba eona, ka hona ho hlahisa matla a phahameng a flexural le a hatellang a thepa, mmoho le tlhōrō ea ho hanyetsa kutu ho feta alumina feela.
Hlokomela hore zirconia toughened alumina ha ea lokela ho ferekanngoa le alumina-toughened zirconia (MORAOA). Leha lisebelisoa ka bobeli li sebelisa lisebelisoa tse tšoanang, boholo ba bona bo fapane. Ho ZTA karo-karolelano ena e etsa qeto ea thepa ea eona ea ho qetela e e lumellang ho kopana le litlhaloso tse ikhethileng tsa ts'ebeliso.
ZTA ke khetho e nepahetseng ea thepa bakeng sa litiiso tsa li-valve, lihlahla, likarolo tsa pompo, le likopo tsa bongaka ka lebaka la matla a eona a phahameng le ho hanyetsa ho apara. Ho feta moo, ZTA e tsitsitse ka lik'hemik'hale, e hanyetsanang le mocheso, insulator e sebetsang hantle, e nang le matla a fokolang a motlakase ho feta alumina e hloekileng le li-agent tse tsitsitseng tse kang yttrium, ceria le magnesia hangata li eketsoa e le li-stabilizers molemong oa ho ntlafatsa ts'ebetso ea eona – li-oxide tsena li thusa ho fetola zirconia ea monoclinic hore e be liforomo tsa tetragonal le cubic tse etsang hore thepa e be matla haholoanyane khahlanong le liphetoho tsa mocheso ho feta mofuta oa eona oa monoclinic le liphetoho tsa mocheso ha nako e ntse e ea..
E theko e tlase
Zirconia ke thepa ea ceramic e thata haholo ebile e tšoarella. Ka botsitso bo phahameng ba lik'hemik'hale, matla a phahameng / thata / litekanyetso tsa kutu / thepa ea ho itšireletsa le litšobotsi tse ntle tsa motlakase, zirconia e etsa khetho e ntle ea thepa bakeng sa ho sebelisoa lits'ebetsong tse ngata tse fapaneng – ho tsoa likarolong tsa 'mele joalo ka 'mele oa ceramic kapa li-implants tsa bongaka, ho likarolo tse hlokang matla a phahameng a mochini / nako e telele joalo ka li-implants tsa bongaka.
zirconia toughened alumina e hanela ho bola ha lik'hemik'hale le ho fapana ha mocheso ntle le ho phatloha kapa ho robeha, ka lebaka la likaroloana tsa zirconia tse hasaneng ka har'a matrix ea alumina e monyang matla a mocheso ho hlahisa khatello ea maikutlo e thibelang ho phatloha. – khetho e nepahetseng ea thepa bakeng sa likarolo tsa sebōpi, li-exchanger tsa mocheso oa indasteri le likarolo tsa enjene ea turbine. Ho feta moo, Botsitso bo boholo ba ZTA bo kopantsoeng le palo e tlase ea katoloso ea mocheso bo etsa hore e be e loketseng ho sebelisoa e le likarolo tsa sebōpi kapa likarolo tsa enjene..
Zirconia Alumina Ceramics e entsoe ka lisebelisoa tse peli tse arohaneng – zirconium oxide le aluminium oxide – ka zirconium oxide e nang le 'mala o mosoeu o nang le khanyetso e ntle ea kutu, ha aluminium oxide e ithorisa ka boima bo phahameng; ha di kopane, ba etsa ceramic e phahameng ka ho fetisisa e thata le e sireletsang, e nang le bokgoni ba ho hlahiswa ka dibopeho le boholo bo fapaneng.
Ceramics e sebelisoa haholo lits'ebetsong tsa abrasion joalo ka ho sila kapa ho sila. Ho feta moo, ba etsa lisebelisoa tse kholo bakeng sa tšebeliso ea bongaka le ea meno ka lebaka la ho hanyetsa ha bona ho apara, biocompatibility le ho boloka litšenyehelo tsa nako e telele; ho etsa li-ceramics tsena khetho ea nako e telele ea moruo.
Alumina e matlafalitse Zirconia (MORAOA) li-ceramics ke khetho e ikhethang ea mesebetsi e mengata e tlang e tletse melemo e mengata. Ho feta moruo oa bona 99% balekane ba ntse ba sebetsa ka tsela e tšoanang, ATZ e ithorisa ka khanyetso e ikhethang ea ho apara, ho se sebetse ha lik'hemik'hale le ho tiea ha fracture mochesong o tloaelehileng; karo-karolelano ea alumina ho zirconia e ka hlophisoa ho latela litlhoko tse khethehileng tsa kopo.
zirconia toughened alumina hangata e sebelisoa lits'ebetsong tse hlokang ts'ebetso e phahameng le mamello. Lipatlisiso tsa morao-rao li bontša hore e ka thusa ho fokotsa mathata a ho buuoa ka letheka ka ho fokotsa ho ruruha le ho senya. – sena se ka ipaka se thusa haholo har'a batho ba bacha le ba mafolofolo ba nang le litebello tse kholo tsa ts'ebetso ea nako e telele.