Zirconia taurin Alumina
Zirconia taurin alumina (ZTA) wani ci-gaba yumbu abu ne da aka yi amfani da shi sosai a cikin hatimin bawul, bushings, kayan aikin famfo da kayan aikin yankewa saboda ƙarfinsa da kwanciyar hankalin sinadarai – kamar yadda aka tabbatar ta hanyar iya jure nauyi mai nauyi ba tare da raguwa mai yawa ba.
ZTA yana alfahari da juriya mai girgiza zafi mai ban sha'awa kuma yana iya jure canje-canje kwatsam a cikin canjin zafin jiki, da kuma saurin yanayin zafi. Ci gaba da karantawa don ƙarin koyo game da kayan aikin injin sa!
Tauri
Zirconia da aka ƙara zuwa matrix alumina yana ƙara taurin sa, karaya taurin kai da sassauƙar ƙarfi yayin ƙara juriya ga lalacewa da yazawa. Hanyar da aka fi amfani da ita ita ce canjin lokaci da samuwar microcrack amma kuma yana iya haɗawa da ka'idodin damuwa kamar yadda ya dace..
Metastable tetragonal zirconia hazo wanda ya haifar da kyakkyawan tarwatsewa a cikin matrix na alumina na iya jujjuya canji na kai tsaye zuwa nau'ikan monoclinic lokacin da aka ɗaga ƙuntatawar su yayin yaduwa., samar da makamashi a kan danniya filayen tuki fasa yaduwa.
ZTA yumbura yana da tauri mai ƙarfi da ƙarfi idan aka kwatanta da sauran tukwanen injiniya na tushen oxide., haka kuma sau biyu ƙarfin gajiya na cyclic na Y-TZP. Saboda haka, kaddarorin sa sun sa ya dace da aikace-aikacen da ke buƙatar matsanancin juriya, rashin kuzarin sinadarai da ƙarancin gogayya da ƙarfi da ƙarfi.
Ƙarfin Flexural
Za a iya yin tukwane na ZTA ta hanyar canza rabon yttria daidaita zirconia (Y-TZP) a cikin matrix alumina ta amfani da latsa isostatic mai zafi, don inganta taurin-karye taurin-ƙarfin haɗin gwiwa wanda ke haifar da juriya mara misaltuwa ta cyclic wanda ya zarce mafi yawan kayan aikin fasaha na ci gaba..
Y-TZP mai ɗorewa a cikin matrix na alumina yana haifar da samuwar tetragonal-monoclinic canji lokaci agglomerates wanda ke ƙara ƙarfin karyewa ta hanyar haɓaka canjin lokaci. (Clausen 1976). Zai fi dacewa ƙetare tsatsa, waɗannan agglomerates miƙa mulki za su damfara yankin gaba da tsagewar gaba kuma su rage ci gaba, ƙarshe yana ƙara ƙarfi tauri.
Wannan tsarin kayan abu ya haifar da ƙirƙirar alumina-zirconia composites kamar BIOLOX Delta, ana amfani da shi sosai don jimlar maye gurbin hip da sauran abubuwan da ke ɗauke da nauyin ƙwayar cuta. Wannan yumbu biomaterial yana da fasalin juriyar lalacewa, rashin kuzarin sinadarai a cikin daki, Juriya girgiza zafin zafi da ingantaccen rashin kuzarin sinadarai a duk yanayin zafi.
Juriya na Lalata
Chemically inert kuma mai jure yanayin zafi da lalacewa, yana bayar da ingantaccen aiki idan aka kwatanta da 99 alumina ceramics kuma yana da tsada-tasiri kuma.
Zirconia kuma yana da ƙarfi mai ban sha'awa, flexural da elasticity Properties da biocompatibility – sanya shi manufa don amfanin likita kamar maye gurbin hip. Saboda canji mai ƙarfi a ƙarƙashin yanayin damuwa, Barbashi zirconia suna canzawa daga nau'in tetragonal metastable zuwa nau'in monoclinic, taimakawa kusa da tsagewa da kyau yayin da ake ƙara taurin karaya.
CeramTec (Biolox Delta) Yana tallata kayan haɗin alumina-zirconia inda zirconia mara ƙarfi ya kasance a cikin tetragonal lokaci don sarrafa wannan canji da samar da tsinkewar tip da ɓarna., inganta taurin alumina matrix. Abubuwan da ke cikin zirconia na kayan za a iya canza su ta hanyar shirye-shiryen foda da fasaha na densification.
Juriya Shock Thermal
Zirconia da aka ƙara zuwa matrix na alumina na farko yayin sintering na iya haɓaka ƙarfinsa da ƙarfi sosai, ƙirƙirar abin da aka sani da ZTA (Zirconia taurin Alumina), ƙetare yumburan alumina na yau da kullun a cikin aikace-aikacen injina da lalacewa.
Zirconia toughened alumina ana lura da shi don kyawawan kaddarorin sa kamar babban taurin zafi da ƙarfin fyaucewa., rashin kuzarin sinadarai a cikin daki, low thermal fadada rates da kyau kwarai thermal girgiza juriya – ingantattun kaddarorin don niƙa abubuwan da aka gyara da kuma sawa sassan da ke buƙatar hanyoyin sanyaya.
CeramTec yana kasuwancin ZTA da ake kira Biolox delta wanda ke nuna matrix alumina tare da tarwatsa sassan Y-TZP. (17 nauyi/wt%) da kuma strontium aluminate platelets (0.5 nauyi/wt%), samar da ingantacciyar hanyar haɗin tetragonal-zuwa-monoclinic hanyoyin canza yanayin da fasahohin karkata don samar da ingantaccen tauri., wanda ya sa wannan manufa don matakan THA na farko a kan filaye masu ɗaukar mata.
Kayan Wutar Lantarki
Zirconia-taurin alumina na iya jure girgiza zafin jiki ba tare da fashewa ko fashe ba a ƙarƙashin canje-canje kwatsam a zazzabi., godiya ga tarwatsewar alumina barbashi da suka tarwatse a cikin matrix ɗin sa waɗanda ke ɗaukar makamashin thermal kuma suna haifar da matsananciyar damuwa waɗanda ke hana karaya..
Alumina-zirconia yumbura ya fi girma fiye da takwaransa na zirconia mai tsabta, yin shi manufa domin lantarki rufi aikace-aikace. Bugu da kari, ƙananan haɓakar zafi fiye da zirconia ya sa ya dace da sassan da ke buƙatar sanyaya.
Canji mai ƙarfi na abubuwan haɗin Alumina-zirconia yana ba da ƙarin fa'idodi; nan, Zirconia hatsi a cikin matrix alumina suna jurewa lokaci mai tsauri inda hatsin su ke canzawa daga tsarin tetragonal zuwa tsarin monoclinic., don haka rage raguwa mai haifar da damuwa ta hanyar ƙara juriya ga abrasion da tasiri. Alumina toughened zirconia yawanci faruwa ta hanyar pyrophoric dauki shafe Zirconium(IV) oxide octahydrate, Aluminum Nitrate Nanohydrate Trietylamine da HNO3(Nitric acid); ƙara girma barbashi girma da taimako watsawa na metastable zirconia hatsi.