Zirconium oxide ndi aluminiyamu okusayidi zimaphatikizidwa pamodzi zimatulutsa Zirconia Toughened Alumina (ZTA), chinthu chapadera mu ntchito zambiri. Zimango katundu, mphamvu, kulimba kwa fracture, elasticity, kuuma ndi kukana kuvala kumayamikiridwa kwambiri muzinthu za ceramic zomwe zili m'gulu la AZ composites.. ZTA yakhala chisankho chokondedwa champhamvu zamakina apamwamba, kukana kutentha ndi kukana dzimbiri.
Kusindikiza Mapangidwe ndi Mapangidwe
Mwa zina, Zirconia Toughened Alumina imakhala ndi njere za zirconia zomwazikana mofanana mkati mwa alumina matrix.. Nthawi zambiri, izi zikuphatikizapo 10-20% kuchuluka kwa ZrO2 mu alumina. Kutengera kuchuluka kwawo, zosakaniza zosakaniza zimathandizira ku zitsulo za ceramic zomwe zili ndi mawonekedwe apadera kutengera ntchito inayake.
Zomangamanga: Alumina ndi Zirconia
Zigawo zazikulu zomwe zimasakanizidwa kupanga ZTA ndi alumina ndi zirconia. Komanso, ma implants a mafupa akhala akugwiritsa ntchito zida za ceramic izi zomwe zimadziwika kuti Aluminium Oxide (Al2O3) m'mbiri chifukwa cha biocompatibility yake yabwino komanso mphamvu zake zazikulu zamakina ndi kukana kwa fracture.
Chinthu china chodziwika bwino cha zirconia ndi kuchepa kwake kwa dzimbiri komanso kukhazikika kwa mankhwala komanso mphamvu zamakina.. Modulus Yake Yamng'ono ili mu dongosolo lomwelo la kukula ndi zitsulo zosapanga dzimbiri.
Mmene Amapangidwira
Kupanga ZTA kumatanthauza kupanga njere za tetragonal-phase zirconia zomwe zimagawidwa mofanana mu alumina matrix.. Kupsinjika kwa tip tip kumatha kusintha mawonekedwe a kristalo wa tetragonal kukhala monoclinic imodzi potero kumabweretsa kuwonjezeka kwa kuchuluka kwa zirconia.. Kukula kwa voliyumu kotereku kumachepetsa kapena kuyimitsa kukula kwa mng'alu zomwe zimapangitsa kuti zikhale zolimba komanso zolimba.
Katundu Wamakina a ZrO2-Al2O3 Ceramics
Pali zinthu zambiri zamakina zomwe zimawonetsedwa ndi ZTA kuphatikiza kuuma kopambana kuposa ma alumina wamba omwe ali ndi kachulukidwe ofanana., mphamvu zosunthika kwambiri kuposa ma alumina wamba komanso otsika kuposa zirconias wamba pazowonjezera zamafuta (CLTE).
Zirconia Toughened Alumina ili ndi mphamvu zamakina apamwamba kwambiri ndipo imalimbana ndi kutentha kotero sikuwononga. Pansipa pali zina mwazinthu za ZTA:
Mtengo wa Katundu
Chemical Formula Zr-Al2O3
Kuchulukana 4.1-4.38 g/cm3
Kuuma 1750-2100 Batani
Kusangalala 45-49 x 10^6 psi
Flexure Mphamvu 100-145 ksi
Chiwerengero cha Poisson 0.26
Kulimba kwa Fracture 5-7 MPa m^1/2
Coefficient of Thermal Expansion 8.0-8.1 x 10^-6 1/C
Thermal Conductivity 20.0-21.0 W/mK
Shock Resistance 325 °C
Maximum Ntchito Kutentha 1650 °C
Kugwiritsa ntchito ZrO2-Al2O3 Ceramics
Zirconia Toughened Alumina imagwiritsidwa ntchito pazinthu zosiyanasiyana monga zomwe zimafuna mphamvu zambiri komanso kukana kuvala. Izi zikuphatikizapo zisindikizo za valve, manja, pompa pistons, kupopera mbewu mankhwalawa ndi mbali zina zamakampani.
Biocompatibility ya ZTA
M'maphunziro osiyanasiyana, ZTA yanenedwa kuti sipanga minyewa yoyipa ikayikidwa, zomwe zimapangitsa kuti ikhale yabwino kwa zigawo zonyamula katundu wa mafupa.. Kuphatikiza apo, kuuma, kulimba ndi mphamvu zowonetsedwa ndi zirconia-alumina ceramics zimawapangitsa kukhala oyenera zida zonyamula katundu za mafupa..
ZTA mu Hip Arthroplasty
Pakhala pali zokambirana zambiri pazadothi monga aluminiyamu, zirconia ndi zirconia zolimba alumina (ZTA) monga zipangizo zoyenera mu hip arthroplasty . Ubwino uwu wa ZTA udakwaniritsidwa popanda kuphatikizira zoyipa zomwe zimagwirizanitsidwa ndi yttria-stabilized zirconia yomwe imawonetsa zida zamakina apamwamba kapena aluminiya yokhala ndi inertness yayikulu..
ZTA mu Knee Arthroplasty
Kwambiri, mapangidwe a ceramic implant a mawondo athunthu a arthroplasty (TKA) apangidwa kuti athe kuthana ndi vuto la ziwengo zomwe zingachitike kwa odwala pamene titaniyamu kapena cobalt-chromium alloy alloy amatulutsa timadzi timene timavala.. The Zirconia Toughened Alumina (ZTA) Matrix Composite ndi yodula kwambiri biomaterial pazogwiritsa ntchito ngati izi.
ZTA: Tsogolo Lolonjezedwa
Izi zikuphatikizapo kufufuza kosalekeza komanso chitukuko cha njira zokometsera za ZTA ndi momwe angagwiritsire ntchito. Zirconia Toughened Alumina yopangidwa ndi gulu ina idapangidwa kuti ikhale ndi mphamvu zamakina malinga ndi mphamvu zosunthika zocheperako kuposa zomwe zimapezeka pamalonda za Biolox® Delta.. Wina, monga silicon nitride ceramics composites yomwe idayambitsidwa posachedwa mu arthroplasty ya chiuno imawonetsanso mphamvu zapamwamba kuposa alumina. Tsogolo liri lowala kwa ZTA yokhala ndi ntchito zambiri komanso zinthu zapamwamba.. Choncho, ndi ukadaulo wopita patsogolo, zikuyembekezeredwa kuti ZTA idzakhala maziko a malingaliro atsopano pazinthu zosiyanasiyana makamaka pa biomedicine.