Zirconia taurin Alumina

Alumina-zirconia composites an taurare ta hanyar danniya-jawo canji na kyau tetragonal zirconia barbashi zuwa wuya., abubuwa masu ƙarfi tare da matsananciyar ƙarfi da ƙarfi waɗanda ke sa su dace da aikace-aikace da yanayi daban-daban.

An yi amfani da gelcasting don ƙirƙirar samfuran ZTA, tare da hankali da hankali biya zuwa inganta slurry shiri tare da daban-daban m loadings, gyare-gyare da gyare-gyaren matakai, bushewar ƙarfi (osmotic vs bushewar iska), da pyrolysis da sintering matakai a 1550 kuma 1650 degC don dalilai na bushewa. Yawan yawa, taurin, An gudanar da ƙima mai ƙarfi da ƙarfin sassauƙa akan duk samfuran da aka ƙirƙira ta amfani da gelcasting.

Yana da babban taurin

Zirconia taurin alumina (ZTA) shi ne manufa domin bukatar aikace-aikace saboda ta high taurin. An yi amfani da simintin gel, ZTA yana ba da tanadin farashi akan sauran kayan yumbu yayin da yake alfahari da ƙarfi. ZTA na iya jure yanayin zafi 1650 degC yayin da ya rage farashin tasiri saboda ya ƙunshi foda na yttria-stabilised zirconia da alumina waɗanda aka haɗa ta amfani da simintin gel da dabarun sintering..

Kayan yumbura na ZTA sun yi fice saboda tsananin taurinsu saboda sauyin sa daga tetragonal zuwa matakan monoclinic., yana ƙara taurin karaya da kamar biyu. Wannan tsarin yana faruwa ne ta hanyar bambance-bambance tsakanin modules ɗin su na roba tsakanin matakan nasu – zirconia da alumina bi da bi – Ma'ana filayen damuwa da aka kirkira yayin canjin lokaci a zahiri suna yin aiki don rage yaɗuwar ɓarna yana sa ZTA ta fi ƙarfin tukwane na alumina na gargajiya..

Zirconia-taurin alumina yana alfahari da tauri mafi girma da taurin karaya akan AlN, haka kuma mafi girman ƙarfin sassauƙa idan aka kwatanta da duka waɗannan kayan, sanya shi kyakkyawan ɗan takara don aikace-aikacen kera motoci da dorewa. Bugu da kari, ZTA yana fasalta ingantacciyar juriyar girgiza zafin zafi da kuma kyawawan kaddarorin rufin lantarki, sanya shi dacewa da amfani da mota da sauran amfanin likitanci; haka ma, ZTA baya nuna lalacewar DNA ko cutar kansa a cikin sel masu shayarwa, samar da yuwuwar amfani azaman kayan dasa hakori saboda kyawawan kaddarorin injin sa da kaddarorin biocompatibility.

Yana da babban tauri

Zirconia taurin alumina (ZTA), ko zirconium taurin alumina, wani yumbu abu ne wanda ya ƙunshi duka alumina da zirconium waɗanda ke ba da ƙayyadaddun kayan aikin injiniya kamar babban taurin flexural., karaya tauri, elasticity, taurin da juriya. Za'a iya sauya rabo tsakanin waɗannan kayan cikin sauƙi don saduwa da takamaiman aikace-aikace; Kayayyakin ZTA sun fi waɗanda aka yi da zirconia zalla yayin da suke da tasiri mai tsada.

An yi amfani da wannan kayan cikin nasara a cikin maye gurbin ƙwanƙwasa na mata da kuma acetabular liners saboda dacewarsa da ƙarfin ɗaukar nauyi na dogon lokaci.. Duk da haka, Dole ne a fara tantance dacewarsa a cikin vivo.

ZTA yana samun babban tauri saboda tsarin sa na tetragonal mai ƙarfi da ƙarfi daga matrix alumina., Inda matsananciyar juzu'i ke haifar da tashin hankali; wato, zirconia yana canzawa zuwa nau'ikan monoclinic lokacin da aka juyar da ƙarfin matsawa daga matrix alumina, samar da kuzarin damuwa wanda ke jinkirta ko dakatar da yaduwa ta haka yana haifar da canji mai ƙarfi wanda ke hana yaduwar fasa..

ZTA tana alfahari da ingantaccen ƙarfin sassauƙa 99% alumina ceramics saboda yanayin tetragonal na metastable da matrix alumina, muhimmanci ya zarce ta a wannan fannin. Duk da haka, Alumina-zirconia composites na iya zama gaggautsa saboda ƙananan kamanni da kamawar iska da barbashi agglomeration wanda ke haifar da lahani da raguwar ƙarfi. – duk da haka aikinsa ya zarce yumbu na alumina na gargajiya a aikace-aikacen likitanci da masana'antu iri ɗaya.

Yana da babban ƙarfi

Zirconia taurin alumina abu ne mai dorewa sosai, wanda ya sa ya dace da aikace-aikacen masu ɗaukar kaya. An ƙirƙira ta hanyar canza yanayin daɗaɗɗen ƙwayoyin tetragonal zirconia zuwa matrix alumina., da samar results a sosai uniform barbashi rarraba tare da na kwarai ƙarfi da tauri Properties.

yumbu kuma yana da matukar juriya ga lalata sinadarai. Ya dace da amfani da yawa ciki har da ƙwararrun likitanci da kayan haƙori saboda ƙarfin da yake iya jure maimaita bayyanar da ruwan jiki da sinadarai..

ZTA kuma ta yi fice tare da juriyar girgiza zafin zafi, yayin da barbashi na zirconia suka tarwatse a cikin matrix alumina suna ɗaukar makamashin thermal kuma suna haifar da matsananciyar damuwa don guje wa samuwar fashewa. – wannan yana ba da damar ZTA yumbura don amfani da shi cikin aminci don aikace-aikacen zafin jiki mai ƙarfi kamar kayan aikin wuta da sassan injin injin turbine ba tare da haɗarin lalacewa ko gazawa ba..

ZTA yana samun ƙarfinsa daga tsarinsa da rarraba nanoparticle, kazalika da zafi isostatic latsawa da kuma na al'ada sintering don ƙara aminci. Don ƙarin sassauci, Hakanan za'a iya samar da shi ta amfani da hanyoyin ƙirƙira sol-gel waɗanda ke canza kwayoyin halitta zuwa daskararru – a cikin wannan misali hada alumina foda da zirconia foda a cikin wani ruwa mai kama da gel wanda za'a iya samar da shi zuwa nau'i daban-daban kafin a gasa a cikin tanda har sai an yi magani kafin a gyara shi kuma a bushe don samar da ZTA tare da babban tsari mai kyau na crystal tare da canza launin crystal., atomic, jihohin lantarki da ke haifar da ZTA waɗanda ke nuna girma mai yawa da kuma canjin crystal, Jihohin atomic da kuma canza tsarin crystal, canza tsarin kristal da kuma kristal da aka canza, jihohin atomic suna haifar da canza crystal, atomic jihohin don ƙara aminci.

Yana da juriya mai zafi

Kayan ZTA yana ba da juriya mafi girma, yin shi dace da aikace-aikace bukatar matsananci karko. Bugu da kari, juriya-lalata da ƙarfin sassauƙawar sa ya sa ZTA ta dace da ɗaukar dogon lokaci zuwa yanayin zafi har zuwa 1773 K – yin shi kyakkyawan zaɓi don ɗaukar kayan aiki na dogon lokaci zuwa matakan zafi mai girma.

Binciken da aka yi kwanan nan ya nuna cewa zirconia yana haɓaka kayan aikin injiniya na alumina, musamman taurinsa da ƙarfin sassauƙansa. Wannan tasirin yana faruwa ne saboda ƙwayoyin zirconia suna haifar da damuwa mai ƙarfi akan matrix alumina lokacin da ke cikin damuwa; wannan matsananciyar damuwa yana taimakawa rage yaduwa yayin da lokaci guda yana haɓaka taurin karaya.

Abubuwa da yawa suna tasiri ayyukan haɗin gwiwar ZTA, irin su hanyoyin da za a bi da shi da yanayin zafi da kuma adadin zirconia da aka kara. Gabaɗaya, ƙara ƙarin zirconia yana kula da haɓaka aiki; duk da haka da yawa zirconia na iya rage ƙarfin sassauƙanta da kuma taurin karaya.

Alumina-zirconia-taurin alumina (CEWA) wani ci-gaba na yumbu abu ne da ake amfani da shi a aikace-aikacen masana'antu daban-daban. Gina alumina da zirconium oxide da aka haɗa ta hanyar yumbu wanda ke haɓaka ƙarfin sassauƙa da karyewar kayan., AZT yana yin kyakkyawan abu don injin da aka fallasa ga yanayin zafi kamar tanda da tanderu.