Zirconium oxide na aluminum oxide jikọtara ọnụ na-emepụta Zirconia Toughened Alumina (ZTA), ihe pụrụ iche n'ọtụtụ ngwa. Ngwa igwe, ike, mgbaji siri ike, elasticity, A na-enwe ekele nke ukwuu maka ike ike na nguzogide iyi n'ime ihe seramiiki a mejupụtara nke bụ nke klas nke AZ composites.. ZTA aghọwo nhọrọ kachasị mma maka ike ọrụ dị elu, thermal eguzogide na corrosion iguzogide.
Ndozi ihe mejupụtara na nhazi
Tinyere ihe ndị ọzọ, Zirconia Toughened Alumina nwere mkpụrụ osisi zirconia gbasasịrị n'otu n'otu n'ime matriks alumina.. Ọ na-adịkarị, nke a gụnyere 10-20% olu nke ZrO2 na alumina. Dabere na oke ha, Ngwakọta ndị mejupụtara na-enye aka na ceramik nwere njirimara ụfọdụ dabere na otu ngwa.
Ihe mgbochi ụlọ: Alumina na Zirconia
Ihe ndị bụ isi nke agwakọtara iji mepụta ZTA bụ alumina na zirconia. Ọzọkwa, Nkwụnye orthopedic na-eji ihe seramiiki a maara dị ka Aluminom Oxide (Al2O3) n'akụkọ ihe mere eme n'ihi na ọ dị mma biocompatibility yana nnukwu ike ọrụ ya na nkwụsị mgbaji.
Ihe ọzọ pụtara ìhè nke zirconia bụ ọnụ ọgụgụ corrosion ya dị ala yana ezigbo nkwụsi ike kemịkal yana ike ọrụ dị elu.. Modules nke Young ya dị n'otu usoro nke ịdị ukwuu ya na alloys igwe anaghị agba nchara.
Otú E Si Eme Ya
Ịmepụta ZTA pụtara ịmepụta mkpụrụ osisi tetragonal-phase zirconia nke ekesara n'otu n'otu na matriks alumina.. Ntinye uche n'ọnụ mgbawa nwere ike gbanwee usoro kristal tetragonal ka ọ bụrụ nke monoclinic si otú a na-eduga n'ịbawanye ụba nke zirconia.. Mgbasawanye olu dị otú ahụ na-atụgharị nke ọma ma ọ bụ kwụsị uto nke mgbawa na-eduga n'ịdị ike na ike ka ukwuu.
Njirimara arụrụ arụ nke ceramik ZrO2-Al2O3
Enwere ọtụtụ ihe eji arụ ọrụ nke ZTA gosipụtara gụnyere ike siri ike karịa alumina nke nwere ụkpụrụ njupụta yiri ya., ike mgbanwe dị elu karịa aluminas nke mbụ ma dị ala karịa ọnụọgụ zirconias nkịtị nke mgbasawanye thermal linear. (CLTE).
Zirconia Toughened Alumina nwere nnukwu ọrụ arụ ọrụ yana ọ na-eguzogide okpomọkụ ya mere ọ naghị emebi emebi.. N'okpuru bụ ụfọdụ akụrụngwa ZTA:
Uru Ngwongwo
Ụdị Chemical Zr-Al2O3
Njupụta 4.1-4.38 g/cm^3
Isi ike 1750-2100 Bọtịnụ
Ngbanwe 45-49 x 10^6 psi
Ike Mgbanwe 100-145 ksi
Ọnụ ego Poisson 0.26
Mgbaji siri ike 5-7 MPa m^1/2
Ọnụọgụ nke Thermal Mgbasawanye 8.0-8.1 x 10^-6 1/C
Nrụpụta okpomọkụ 20.0-21.0 W/mK
Nguzogide ujo 325 Celsius C
Okpomọkụ arụ ọrụ kacha 1650 Celsius C
Ngwa nke ceramik ZrO2-Al2O3
A na-eji Zirconia Toughened Alumina mee ihe na ngwa dị iche iche dị ka ndị chọrọ ike dị elu ma na-eyi nguzogide. Ndị a gụnyere akara valvụ, aka uwe, pistons mgbapụta, spraying nozzles na ndị ọzọ ulo oru akụkụ.
Biocompatibility nke ZTA
N'ọmụmụ ihe dị iche iche, A kọwo na ZTA adịghị emepụta mmeghachi omume anụ ahụ na-adịghị mma mgbe a na-akụnye ya si otú a na-eme ka ọ bụrụ ezigbo onye nyocha maka ihe ndị na-ebu orthopedic.. Na mgbakwunye, isi ike, ike na ike gosipụtara site na ceramics zirconia-alumina na-eme ka ha dabara maka akụrụngwa na-ebu orthopedic..
ZTA na hip arthroplasty
Enweela nnukwu ntụle maka seramiki dị ka alumina, zirconia na zirconia siri ike alumina (ZTA) dị ka ihe kwesịrị ekwesị na hip arthroplasty . Enwetara uru ndị a nke ZTA na-enweghị itinye aka na adịghị ike ndị metụtara yttria-stabilized zirconia nke na-egosipụta ihe onwunwe dị elu ma ọ bụ alumina na nnukwu inertness ya..
ZTA na Knee Arthroplasty
Ọtụtụ, atụmatụ ịkụnye seramiiki maka mkpokọta arthroplasty ikpere (TKA) emepụtara iji dozie okwu nke mmeghachi ahụ nfụkasị ahụ nwere ike ime na ndị ọrịa mgbe titanium ọgbara ọhụrụ ma ọ bụ cobalt-chromium alloy components tọhapụrụ irighiri ihe.. Zirconia na-agbaze Alumina (ZTA) Matrix Composite bụ ihe na-egbu egbu biomaterial maka ngwa ndị dị otú ahụ.
ZTA: Ọdịnihu Na-ekwekwa Nkwa
Nke a na-agụnye nyocha na-aga n'ihu yana mmepe n'ụzọ na-emeziwanye njirimara ZTA na ojiji ya. A na-emepụta ogbe ọzọ Zirconia Toughened Alumina nwere akụrụngwa arụ ọrụ n'ihe gbasara ike mgbanwe dị obere karịa nke sitere na Biolox® Delta nke azụmahịa dị.. Ọzọ, dị ka silicon nitride ceramics composites ewebata n'oge na-adịbeghị anya n'ime hip arthroplasty na-egosipụtakwa ike dị elu karịa alumina.The Future na-egbuke egbuke maka ZTA na ọtụtụ ngwa na elu Njirimara.. Ya mere, na teknụzụ na-agbanwe agbanwe, a na-atụ anya na ZTA ga-abụ ntọala maka echiche ọhụrụ n'akụkụ dị iche iche karịsịa na biomedicine.