zirconia toughened alumina shine yumbu mai ci gaba wanda ke ba da ƙarfi da ƙarfi fiye da alumina. Ana samar da wannan abu ta amfani da aluminum oxide gauraye da zirconium oxide wanda aka daidaita ta amfani da ko dai yttria., ceriya, ko magnesia a matsayin stabilizers.Ƙarin waɗannan kayan yana sa ZTA jurewa karaya kuma yana ƙara ƙarfin sassauƙa da matsawa., da kuma jure yanayin zafi.
Yana da jituwa
zirconia toughened alumina yana da jituwa tare da ingantaccen maye gurbin bakin karfe a cikin kayan aikin likita, yin hidima a matsayin madadin juriya mai tasiri mai tasiri. Mai iya jure yanayin zafi yayin da yake da tsayi sosai, ZTA kuma yana alfahari da kyakkyawan juriya na lalacewa wanda ake buƙata don aiki na dogon lokaci kuma yana fasalta ƙarancin ƙarewa don yin tsaftacewa cikin sauƙi.; Bugu da kari, juriya mafi girma ta sa ya zama zaɓi mai dacewa don hatimin bawul.
ZTA tana alfahari da mafi girman rabo-da-nauyi, tare da yawa kasancewarsa kawai 4.3 g/cm3. Yana ba da kyakkyawan kwanciyar hankali na thermal kuma ana iya sarrafa shi cikin sauƙi ta amfani da daidaitattun kayan niƙa. Matsakaicin zafin aiki na 1923 K da ƙimar haɓakar haɓakar thermal duka suna cikin juriya don amfani akan injuna na yau da kullun, kuma yana da ma'auni na Poisson 0.26, 130ksi na lankwasawa ƙarfi, da 47x106psi elasticity rating.
Ana ƙarfafa matrix alumina tare da zirconia da strontium aluminate don ƙara ƙarfin ƙarfi da juriya na wannan kayan haɗin gwiwar bioactive., yayin da yake aiki a matsayin ƙwanƙwasa tip blunters, haka kuma da kara karaya taurin kai ta hanyar canza canji da hanyoyin karfafa tarwatsawa. Bugu da kari, bioactivity na sa inganta samuwar kashi yayin da lokaci guda inganta osseointegration na hakori implants.
Strontium aluminate yana ba da kyakkyawan juriya na lalata, yayin da zirconia yana haɓaka taurinsa ta hanyar ƙarfafa ƙarfin karaya. Bugu da kari, zirconia yana aiki azaman insulator na lantarki yana sanya wannan kayan ya dace sosai don aikace-aikacen hannun hannu don guje wa haɓakar caji a tsaye..
Ana iya canza zirconia tare da oxides daban-daban don ƙarfafawa da ƙarfafa ta, ciki har da yttria, ceria da magnesia a matsayin na kowa stabilizing jamiái. Alumina-stabilized zirconia (CSZ) ya dace musamman ga muhallin ruwa saboda jurewarsa da harin ruwa na kwayoyin halitta da kuma ƙarfin sassauƙa da ƙarfi..
Alumina-stabilized zirconia na iya zama ingantacciyar maye gurbin abubuwan ƙarfe na ƙarfe a cikin hakora., yin hidima don haɗa rawanin zuwa hakora da aka dasa yayin da suke jure matsanancin damuwa. An yi amfani da kayan aikin ƙarfe a al'ada daga titanium; waɗannan suna da manyan kaddarorin inji amma rashin kyawun kyan gani; yumbu waɗanda suka inganta kyawawan halaye da kuma ƙara ƙarfin hali.
Yana da tauri
Canji mai ƙarfi shine tsari wanda ƙara yttria-stabilised zirconia zuwa matrix alumina yana haɓaka taurin karaya da ƙarfin yumbu.. Wannan haɓaka yana haifar da ƙarin ƙarfin sassauƙa, karaya tauri, Rarraba girman hatsi da juriya mai zafi na zirconia-alumina tukwane; Hakanan suna alfahari da juriya mai ƙarfi na thermal wanda ke sa su dace kayan don aikace-aikacen hatimin bawul ba tare da illa ba ko halayen cutarwa a jikin ɗan adam..
Ƙarin yttria-stabilised zirconia (YSZ) zuwa matrix alumina yana ba da ƙarin ƙarfi da ƙarfi a farashi mai ban sha'awa idan aka kwatanta da YSZ mai tsabta. Bugu da kari, wannan kayan yana nuna kyakkyawan juriya na lalacewa, low dielectric akai-akai kuma ba shi da ƙarfi fiye da sauran abubuwan haɗin alumina; haka kuma ya wuce sauran tukwane na zirconium oxide ta kasancewa mafi dorewa a aikace-aikacen zafin jiki mai kyau tare da kyawawan kaddarorin juriya na sinadarai..
zirconia toughened alumina abu ne mai kyau don kera yankan ruwan wukake saboda taurin sa, juriya, kwanciyar hankali zafi da juriya ga gogayya – halaye wanda kuma ya sa shi da yawa ƙasa da tsada fiye da madadin yankan kayan aiki masana'antu kayan.
Ana samar da ZTA ta amfani da tsarin simintin gel, wanda ya ƙunshi hadawa alumina foda da yttria-stabilised zirconia tare domin samar da slurry., sannan a gyaggyara wannan abu zuwa sifofin da ake so ta amfani da gyaggyarawa. Bayan bushewa da ruwa desiccant, Wannan abu yana tafiya ta hanyar pyrolysis da sintering kafin daga bisani ya zama wani ɓangare na siffarsa ta ƙarshe.
Zirconia-toughed sinter yana nuna kyawawan kaddarorin inji, gami da taurin karaya, flexural ƙarfi da elasticity. Matsakaicin zafin aiki shine 1923 K da ƙimar haɓakar haɓakar thermal suna tsaye a 8.1x 10-6 C-1 yayin da ma'aunin Poisson ke tsaye a 0.26 kuma ƙarfin sa na iya kaiwa 130ksi.
Za a iya samar da alumina mai taurin zirconia ta hanyar ko dai wutar lantarki ko sintiri mai ƙarfi, matakai guda biyu waɗanda ke samar da yumbu masu yawa da tauri tare da lu'ulu'u masu kyau. Wutar lantarki tana fallasa kayan kore ga wutar lantarki har sai sun yi haske, haifar da densification a muhimmanci rage sintering yanayin zafi; babban matsa lamba sintering yana amfani da babban matsa lamba sintered foda wanda Forms crystal tsarin yayin da lokaci guda canza ta atomic da lantarki yanayin..
Yana da juriya da zafi
ZTA wani ci-gaba abu ne wanda ya haɗu da ƙarfi da juriya na zirconia tare da kaddarorin thermal na alumina don aikace-aikacen da yawa a cikin kayan aikin yanke., babban aiki tukwane da ƙari. Saboda wannan hadin, yana ba da ƙarin karko fiye da ɗaya kaɗai, da kuma kasancewa da ƙarfi fiye da tungsten carbide da boron nitride – manufa don aikace-aikacen da ke buƙatar ƙarfi da karko.
ZTA yumbu an san shi da ƙarfinsa mafi girma, haka kuma da kasancewa masu juriya ga harin sinadarai da abrasion. Tare da ingantattun matsi da ƙarfi masu sassauƙa waɗanda suka zarce na alumina da ƙananan ƙimar faɗaɗawar thermal, yana yin kyakkyawan zaɓi na kayan abu don abubuwan da ke buƙatar hanyoyin sanyaya kamar magoya bayan sanyaya. Bugu da kari, Kayayyakin inji na ZTA suna hana tsagewa ko karaya, sanya shi ɗayan kayan yumbu mafi ƙarfi kuma mafi ɗorewa akan kasuwa a yau.
Ana kera abubuwan yumbura ta amfani da haɗe-haɗe na al'ada na yau da kullun da dabarun matsi na isostatic mai zafi don samar da su.. Wannan yana tabbatar da cewa duk kayan sun kasance cikakke ba tare da wani gibi da zai iya lalata amincin sa ba, don haka samar da babban sassauƙa da ƙarfi na abu, tare da fifikon lalata-juriya akan alumina kadai.
Lura cewa zirconia toughed alumina kada a rikita batun tare da alumina-tauri zirconia. (BAYA). Ko da yake duka kayan suna amfani da albarkatun ƙasa iri ɗaya, rabonsu ya bambanta. A cikin ZTA wannan rabo yana ƙayyade kaddarorinsa na ƙarshe yana ba shi damar saduwa da takamaiman ƙayyadaddun aikace-aikacen.
ZTA shine kyakkyawan zaɓi na kayan abu don hatimin bawul, bushings, famfo sassa, da aikace-aikacen likitanci saboda mafi girman ƙarfinsa da juriya. Bugu da kari, ZTA yana da kwanciyar hankali a sinadarai, zafin jiki resistant, insulator mai inganci, tare da ƙananan juriya na lantarki fiye da alumina mai tsabta da kuma ƙarfafawa kamar yttrium, ceria da magnesia galibi ana ƙara su azaman stabilizers don inganta aikinta – Wadannan oxides suna taimakawa canza monoclinic zirconia zuwa tetragonal da nau'i mai siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar monoclinic da juriya..
Yana da arha
Zirconia abu ne mai wuyar gaske kuma abu ne mai dorewa. Tare da ingantaccen kwanciyar hankali, high ƙarfi / taurin / lalata rates / rufi Properties da kyau lantarki insulating halaye, zirconia yana yin kyakkyawan zaɓi na kayan abu don amfani a aikace-aikace daban-daban – daga sassan jiki kamar jikin yumbu ko kayan aikin likita, zuwa sassan da ke buƙatar ƙarfin injina mai ƙarfi / ɗorewa kamar kayan aikin likita.
zirconia toughened alumina yana da juriya ga lalata sinadarai da bambancin zafin jiki ba tare da fatattaka ko karya ba., godiya ga barbashi na zirconia da suka tarwatse a cikin matrix alumina wanda ke ɗaukar makamashin thermal don haifar da matsananciyar damuwa wanda ke hana fashewa. – zabin kayan abu mai kyau don kayan wutan wuta, masana'antu masu musayar zafi da injin injin turbin. Bugu da kari, Kwanciyar kwanciyar hankali na ZTA haɗe tare da ƙarancin ƙarancin haɓakar haɓakar zafi ya sa ya zama cikakke don amfani azaman sassan tanderu ko abubuwan injin..
Zirconia Alumina Ceramics sun ƙunshi abubuwa daban-daban guda biyu – Zirconium oxide da aluminum oxide – tare da zirconium oxide kasancewa fari a launi tare da kyakkyawan juriya na lalata, yayin da aluminum oxide alfahari high taurin; idan aka hada su, suna ƙirƙirar yumbu mafi girma wanda ke da ƙarfi kuma mai rufewa, tare da iya samar da su a cikin siffofi da girma dabam dabam.
Ana amfani da yumbu a ko'ina a aikace-aikacen abrasion kamar niƙa ko niƙa. Bugu da kari, suna yin manyan kayayyaki don amfanin likitanci da haƙora saboda juriyar sawa, biocompatibility da kuma dogon lokaci-tsara-tsara; yin waɗannan tukwane zaɓi na dogon lokaci na tattalin arziki.
Zirconia na Alumina Tauri (BAYA) yumbu babban zaɓi ne na manufa da yawa wanda ya zo cike da fa'idodi da yawa. Mafi tattali fiye da nasu 99% takwarorinsu duk da haka daidai tasiri, ATZ yana alfahari da juriya na lalacewa, rashin kuzarin sinadarai da taurin karaya a yanayin zafi na al'ada; rabon sa na alumina zuwa zirconia har ma za a iya daidaita shi bisa ga takamaiman bukatun aikace-aikacen.
zirconia toughened alumina yawanci ana aiki dashi a aikace-aikacen da ke buƙatar babban aiki da juriya.. Bincike na baya-bayan nan ya nuna cewa yana iya taimakawa rage rikice-rikice na tiyata maye gurbin hip ta hanyar rage kumburi da abrasion – wannan na iya tabbatar da taimako musamman a tsakanin ƙanana da ƙwararrun mutane waɗanda ke da kyakkyawan tsammanin aiki na dogon lokaci.