Ƙarfin da bai dace ba Tare da Zirconia Ƙarfin Alumina (ZTA) Ceramics

Zirconia taurin Alumina (ZTA) yumbu suna alfahari mara misaltuwa tauri. Suna alfahari mafi girman juriya, rashin kuzarin sinadarai da ƙananan gogayya don yin aiki mara ƙarfi a cikin ayyukan yau da kullun – ba a ma maganar mafi girma taurin da taurin fiye da karafa.

ZTA ya ƙunshi metastable tetragonal zirconia polycrystal agglomerates a cikin matrix na alumina wanda ke jurewa yanayin canjin yanayi zuwa yanayin monoclinic a ƙarƙashin damuwa., don haka tarwatsa tsatsa da kuma dakatar da yaduwa, wanda aka fi sani da ƙarfin canji.

Lalata Resistant

ZTA yana ba da ingantaccen juriya na sinadarai idan aka kwatanta da tsantsar alumina kuma yana iya jure matsanancin yanayin zafi ba tare da lalacewa ba, sanya shi zabin kayan aiki mai kyau don aikace-aikacen masana'antu a cikin yanayi da yanayi mai tsanani.

An haɓaka taurin ZTA ta ƙwayoyin zirconia waɗanda ke watsewa da ɗaukar kuzari, yana taimakawa hana fasa. Lokacin da aka yi amfani da yttrium oxide, zirconia yana canzawa daga lokacin tetragonal metastable zuwa monoclinic yayin damuwa don haifar da matsananciyar damuwa wanda ke haɓaka taurin karaya..

Tumbura na tushen zirconia kamar ZTA sun ƙunshi barbashi na alumina don tsayayya da girgiza zafi. Wannan yana ba shi damar jure wa canje-canjen zafin jiki mai sauri ba tare da fashewa ko gazawa a aikace-aikacen manyan ayyuka kamar niƙa da yanke ba; Ƙarƙashin sa na linzamin kwamfuta da faɗaɗawar torsional yana ba da fitattun ƙarfin ɗaukar nauyi da ƙarfin aiki. ZTA yana alfahari 2-3 sau da yawa ƙarfin tensile ƙarfi idan aka kwatanta da tsantsa alumina yayin da samun ƙananan mizani / torsional fadada coefficients don keɓaɓɓen ƙarfin ɗaukar nauyi da ƙarfin aiki..

Babban Tauri

ZTA ya haɗu da ƙarfi da dorewa na alumina tare da zirconia toughening don wani abu na musamman don aikace-aikace masu buƙata.. Wannan haɗin yana ba da ƙarfi mara misaltuwa, karaya tauri, elasticity da hardness Properties a daya kunshin.

Claussen ya gano a 1976 cewa ƙara unstabilized zirconia zuwa alumina muhimmanci ƙara karaya taurin, saboda canjin tetragonal-monoclinic na tarwatsewar tsaunukan tetragonal da suka tarwatse a cikin matrix.. Ana hana irin waɗannan abubuwan haɓakar haɓakawa daga canzawa har sai an fitar da su ta gabatowar tsagewar gaba ko wata hanyar samun sauƙi daga takurarsu., kamar ta hanyar narkewa.

Zafin-matsawa 10mol% yttria-stabilized zirconia (10YSZ), Ƙarfafa da ko dai barbashi ko platelets dauke da daga 0 zuwa 30wt% abun ciki na alumina sun kasance ƙarƙashin ƙarfi mai ƙarfi, Karya tauri da jinkirin gwajin girma a 1000C a cikin iska. Sakamako ya nuna cewa matsakaicin ƙarfin sassauƙan ƙarfi da taurin karyewa ga abubuwan haɗin platelet an cimma su tare da wannan abun cikin abun ciki..

Ƙarfin Ƙarfin Ƙarfi

Abubuwan yumbura na zirconia suna ba da haɗin ƙarfi na ban mamaki, juriya, da juzu'i wanda ya zarce yumbun fasaha na gargajiya. Tsarin Zirconia kamar ZTA yana ba da mafita don aikace-aikacen mafi wahala a yau kama daga abubuwan haɗin sararin samaniya waɗanda ke jure yanayin yanayi mai tsauri zuwa tsararrun ƙwayoyin cuta na zamani waɗanda aka tsara don tsawon rai. – samar da ingantattun mafita don buƙatun yau da kullun.

ZTA ta yi fice a tsakanin sauran kayan aiki saboda ƙarfin sassauƙanta, karaya taurin kai da juriya ga yaduwan fashe saboda lokacin sa na tetragonal. Wannan canji zuwa zirconia monoclinic a ƙananan zafin jiki yana matsawa yankin gaba da fashe gaba don dakatar da ci gaba.

Yttria Partially Stabilized Zirconia (Y-TZP) da Cerium Partially Stabilized Zirconia (Menene -TZP) suna nuna halaye na musamman na tauri irin na ZTA saboda riƙon lokacin tetragonal ta hanyar kiyaye yttria ko cerium a ƙananan yanayin zafi., ba da izinin sauyi a cikin kewayon zafin da za a iya sarrafawa da kuma nuna ƙarancin lalacewa yayin gwajin lodin keken keke fiye da takwarorinsu na Alumina..

Karancin Tashin hankali

Zirconia yana ɗaya daga cikin yumbu mafi ƙarfi na injiniya da ake samu kuma ƙananan kaddarorin sa na gogayya suna taimakawa haɓaka juriya yayin rage buƙatun mai..

ZTA yumbura sun ƙunshi alumina don iyakar tauri. Wannan yana ba da damar yttria-stabilised tetragonal zirconia barbashi a cikin matrix alumina su kasance marasa canzawa., sauran crystalized ta nagarta na interwoven cibiyar sadarwa na hatsi.

Abubuwan da aka sarrafa da yanayin sarrafawa suna tabbatar da cewa canji na tetragonal-zuwa-monoclinic ba zai faru ba bayan sanyaya daga zafin jiki, ba da gudummawa ga iyawa da yawa a cikin gwajin taurin karaya. Bugu da kari, high homogeneity in alumina-zirconia composites tare da ƙananan girman hatsi yana haifar da ƙananan kuzari wanda hakan ke fassara zuwa gajeriyar tsayin tsaga yayin gwaje-gwajen shigar da lu'u-lu'u..

Haɓaka Ƙarfafawar thermal

Ƙarfin ɗaurin Alumina matrix yana ba shi damar hana ƙwayoyin zirconia tetragonal daga canzawa zuwa zirconia monoclinic akan sanyaya., haka yin 10 tawadar Allah % yttria-stabilized zirconia-alumina composites barga da fashe kyauta.

Ƙara cerium zuwa zirconia yana ba shi damar daidaitawa (Menene -TZP). Ce-TZP yana kiyaye lokacin tetragonal a zazzabi na ɗaki kuma yana ƙaruwa da ƙarfi sosai, karaya tauri da sassauƙar ƙarfi idan aka kwatanta da kayan yumbu na haƙori na gargajiya.

Zirconia Toughened Alumina composites hade da Ce-TZP, yttria-stabilized zirconia (Y-TZP), ko magnesia-stabilized zirconia (Mg-PSZ) yana nuna tauri na musamman wanda ya zarce na duka alumina da zirconia monolithic, yin ZTA cikakken ɗan takara don neman aikace-aikace kamar na likitanci, sassan sararin samaniya da injinan masana'antu. ZTA kuma tana da kaddarorin juriya da yawa waɗanda ke kare shi daga acid, gishiri mafita, narkakkar gishiri alkalis da kuma yawan zafin jiki.