Zirconium oxide da aluminum oxide sun haɗa tare da samar da Zirconia Toughened Alumina (ZTA), wani abu na musamman a aikace-aikace da yawa. Kayan aikin injiniya, ƙarfi, karaya tauri, elasticity, Tauri da juriya ana yaba su sosai a cikin wannan kayan yumbu mai hade wanda ke cikin nau'in AZ composites.. ZTA ya zama zaɓin da aka fi so don ƙarfin ƙarfin injina, thermal juriya da lalata juriya.
Yanke Rubutu da Tsarin
Daga cikin wasu abubuwa, Zirconia Toughened Alumina ya ƙunshi hatsin zirconia waɗanda aka tarwatsa iri ɗaya a cikin matrix alumina.. A al'ada, wannan ya hada da 10-20% ƙarar ZrO2 a cikin alumina. Dangane da rabonsu, cakuduwar da aka haɗa suna ba da gudummawa ga yumbu tare da takamaiman fasali dangane da takamaiman aikace-aikacen.
Tubalan Ginin: Alumina da Zirconia
Babban abubuwan da aka haɗa don samar da ZTA sune alumina da zirconia. Haka kuma, Abubuwan da ake sakawa na orthopedic suna amfani da wannan kayan yumbu da aka sani da Aluminum Oxide (Farashin 2O3) a cikin tarihi saboda kyakyawar yanayin halittarsa da kuma babban ƙarfin injinsa da juriyar karaya.
Wani fitaccen kadarorin zirconia shine ƙarancin ƙarancin lalacewa da ingantaccen kwanciyar hankali da ƙarfin injina.. Modulolinsa na Matasa yana cikin tsari iri ɗaya na girma tare da gami da bakin karfe.
Yadda Aka Yi
Don samar da ZTA yana nufin ƙirƙirar tetragonal-lokaci zirconia hatsi waɗanda aka rarraba iri ɗaya a cikin matrix alumina.. Matsakaicin matsananciyar damuwa na iya canza tsarin kristal na tetragonal zuwa na monoclinic wanda hakan zai haifar da haɓakar ƙarar zirconia.. Irin wannan haɓakar ƙarar yana jujjuya da kyau ko yana dakatar da haɓakar faɗuwar da ke haifar da ƙarfi da ƙarfi.
Abubuwan Injini na ZrO2-Al2O3 Ceramics
Akwai kewayon kaddarorin injina da ZTA ke nunawa gami da tauri mafi girma fiye da alumina na al'ada masu ƙima iri ɗaya., Ƙarfin flexural fiye da alumina na al'ada kuma ƙasa da na al'ada zirconia coefficient na shimfidawa na thermal na layi. (CLTE).
Zirconia Toughened Alumina yana da ƙarfin injina kuma yana da juriya na thermally don haka ba ya lalata.. A ƙasa akwai wasu kaddarorin ZTA:
Darajar Dukiya
Chemical Formula Zr-Al2O3
Yawan yawa 4.1-4.38 g/cm^3
Tauri 1750-2100 Maɓalli
Na roba 45-49 x10^6 ku
Ƙarfin Ƙarfi 100-145 ksi
Rabon Poisson 0.26
Karya Tauri 5-7 MPa m^1/2
Coefficient na Thermal Expansion 8.0-8.1 x 10^-6 1/C
Thermal Conductivity 20.0-21.0 W/mK
Resistance Shock 325 °C
Matsakaicin zafin Aiki 1650 °C
Aikace-aikace na ZrO2-Al2O3 Ceramics
Zirconia Toughened Alumina ana amfani dashi a aikace-aikace daban-daban kamar waɗanda ke buƙatar ƙarfin ƙarfi da juriya. Waɗannan sun haɗa da hatimin bawul, hannayen riga, famfo pistons, spraying nozzles da sauran masana'antu sassa.
Biocompatibility na ZTA
A cikin karatu daban-daban, An ba da rahoton ZTA ba ta haifar da wani mummunan halayen nama ba a kan dasa shi don haka ya mai da shi kyakkyawan ɗan takara don abubuwan da ke ɗauke da kaya na orthopedic.. Bugu da kari, da taurin, tauri da ƙarfi da aka nuna ta zirconia-alumina yumbu sun sa su dace da abubuwan ɗaukar nauyin orthopedic.
ZTA a cikin Hip Arthroplasty
An yi shawarwari masu yawa akan yumbu kamar alumina, zirconia da zirconia taurin alumina (ZTA) a matsayin kayan da suka dace a cikin arthroplasty na hip . An samu waɗannan fa'idodin na ZTA ba tare da haɗawa da rashin amfani da ke tattare da yttria-stabilized zirconia wanda ke nuna manyan kaddarorin injina ko alumina tare da babban rashin aiki..
ZTA a Knee Arthroplasty
Galibi, zane-zanen dasa yumbu don jimlar ƙwanƙwasa gwiwa (TKA) An ƙirƙira shi don magance matsalar rashin lafiyar da ka iya faruwa a cikin marasa lafiya lokacin da titanium na zamani ko kayan haɗin cobalt-chromium alloy suka saki ɓarna.. Zirconia Tauraron Alumina (ZTA) Matrix Composite shine babban kayan halitta mai yankewa don irin waɗannan aikace-aikacen.
ZTA: Makomar Alkawari
Wannan ya ƙunshi ci gaba da bincike tare da haɓaka hanyoyin inganta halayen ZTA da yuwuwar amfaninsa. Wani tsari da aka sarrafa Zirconia Toughened Alumina an ƙera shi tare da kaddarorin injina dangane da ƙarfin sassauƙa da ƙasa da na Bilox® Delta na kasuwanci.. Wani, irin su silicon nitride ceramics composites gabatar kwanan nan a cikin hip arthroplasty Har ila yau, yana nuna mafi girma ƙarfi fiye da alumina.The gaba yana da haske ga ZTA da yawa aikace-aikace da kuma m Properties.. Saboda haka, tare da fasaha masu tasowa, ana sa ran cewa ZTA za ta zama ginshikin samun sabbin dabaru ta fuskoki daban-daban musamman kan kwayoyin halitta.