Babban Tauri don Aikace-aikacen Masana'antu

Zirconia taurin Alumina (ZTA) Abubuwan yumbu sun haɗu da taurin da ƙarfin alumina tare da mafi girman karyewar zirconia don sadar da aiki da tsawon rai don aikace-aikacen masana'antu..

Canji mai haifar da damuwa na ɓangarorin tetragonal zirconia masu kyau waɗanda aka saka a cikin matrix alumina suna kaiwa ga kayan ZTA tare da ƙarfi da ƙarfi., dace don amfani a wurare daban-daban masu tsanani.

Tauri

Kayan ZTA sun haɗu da taurin alumina tare da taurin zirconia don juriya mara misaltuwa da lalacewa.. Ana samun wannan tasirin ta hanyar ƙarfafa jujjuyawar da ke haifar da damuwa: lokacin damuwa, Barbashi zirconia suna canzawa daga lokacin tetragonal na metastable zuwa barga na monoclinic; haɓaka girma wanda wannan canjin tsarin ya haifar yana taimakawa rufe kowane fashe a cikin matrix alumina kuma yana ƙara ƙarfi sosai..

ZTA ya ƙunshi platelet zirconia waɗanda ke shiga cikin matrix alumina yayin sintering, inganta karaya tauri da ƙarfi yayin da ƙara ƙarfi taurin, ƙirƙirar kayan aiki tare da ƙarfin juzu'i fiye da Y-TZP kuma har zuwa sau biyu ƙarfin gajiyawar hawan keke. Wannan haɗin tauri daga alumina hade tare da ƙarfin zirconia yana sa ZTA kyakkyawan zaɓi na kayan aiki don aikace-aikacen masana'antu da ke buƙatar juriya na lalacewa..

Dorewa

Zirconia taurin Alumina (ZTA) yana alfahari da fitattun ƙarfin sassauƙa da matsawa, tare da ƙananan haɓakar thermal daidai da na alumina da fitattun kaddarorin juriya.

Zirconia toughened alumina an ƙirƙira shi ta hanyar ƙara ƙwayar tetragonal zirconia ta hanyar canjin da ke haifar da damuwa zuwa matrix alumina mai wuya., sanya su cikin tsarinsa tare da takaita canjin su zuwa yankunan gida maimakon yadawa ko'ina.

Wannan tsarin yana sa abubuwan haɗin alumina-zirconia ya fi tsayi fiye da zirconia na monolithic saboda juriya ga sha ruwa ta hanyar chemisorption.; Zirconia monolithic na iya ɗaukar kwayoyin ruwa na polar wanda ke haifar da lalacewar ƙarancin zafin jiki kuma a ƙarshe rushewa bayan amfani da dogon lokaci..

ZTA, a wannan bangaren, an ƙera shi musamman don sauƙaƙe wannan canjin tetragon-zuwa-monoclinic ta hanyar fasali da ƙari na sinadarai.. CeramTec kasuwannin Biolox Delta ZTA a matsayin misali; Wannan tsari ya ƙunshi yttria da strontium aluminate don sauƙaƙe hanyoyin ƙarfafawa a cikin lokacin zirconia kuma saboda haka yana da ƙarancin ƙarancin ƙarancin zafin jiki yayin jure yanayin yanayin zafi..

Juriya na Lalata

ZTA yumbura yana ba da juriya mai inganci akan takwarorinsu na alumina don haka ana iya amfani da su a cikin kayan aikin da ke ƙarƙashin yanayi mara kyau.. Bugu da kari, ZTA na iya jure yanayin zafi mai girma yayin da yake ba da kwanciyar hankali na sinadarai.

Garvie et al (1975) ya nuna cewa yana karawa 10-20% zirconia mara ƙarfi na iya haɓaka ƙarfi sosai idan aka kwatanta da alumina, ta hanyar yin gyare-gyare. Wannan tsari yana faruwa lokacin da tarwatsewar tetragonal metastable hazo ya canza zuwa monoclinic zirconia a ƙarƙashin damuwa yana haifar da haɓaka girma wanda ke danne fashe kuma yana raguwa ko dakatar da yaduwar su..

Wannan tsarin yayi kama da na damuwa mai haifar da lalacewa; duk da haka, domin haifar da canje-canjen lokaci filin damuwa dole ne ya zama babba; don tsaga a cikin samfuran ZTA wannan makamashi yana fitowa ne daga lanƙwasa damuwa a wuraren karaya.

Juriya mai zafi

Zirconia Toughened Alumina yana alfahari da babban wurin narkewa na musamman da juriya na lalata, sanya shi kayan aiki mai mahimmanci don kayan aiki akai-akai da aka fallasa zuwa yanayin zafi. Bugu da kari, wannan bambance-bambancen yana da mafi girman juriya fiye da daidaitattun alumina, yana taimakawa rage lalacewa akan kayan aikin da aka fallasa zuwa manyan matakan kuzarin motsa jiki.

ZTA yumbura an ƙirƙira su ta hanyar canzawa mai haifar da damuwa na tetragonal zirconia barbashi zuwa matrix alumina., haifar da matsananciyar damuwa a cikin su wanda ke hana yaduwar fasa, haɓaka duka ƙarfi da ƙarfi yayin samar da juriya na zafin zafi ba tare da fashe ko fashe ba. Suna alfahari da kyakkyawan juriya na thermal shock; tsayayya da saurin canje-canje a cikin zafin jiki ba tare da karaya ba ko raguwa a ƙarƙashin damuwa.

Zirconia-taurin alumina yana da amfani da yawa a cikin masana'antu da yawa saboda yawan kaddarorin sa.. Injiniyan injiniya yana amfani da shi don kayan aikin famfo da hatimi; sarrafa semiconductor yana amfani da shi saboda kwanciyar hankali da ƙarfinsa; sararin samaniya, Masana'antar kera motoci da wutar lantarki suna amfani da shi azaman sassan injin saboda juriyarsa da lalata da sinadarai masu tsauri.; har ma yana iya jure maɗaukakin ƙarfi don ƙwanƙwasa hakori!