Zirconia Toughened Alumina maka ngwa di elu

ZTA bụ ihe mejupụtara alumina-zirconia, pụrụ iche site na elu ike na ike. Emepụtara site na ngbanwe nke nrụgide tetragonal zirconia dị mma na matriks alumina..

Zirconia ceramics bụ ihe teknụzụ dị ịrịba ama, na-anya isi nke ọma ike, nkwụsi ike thermal, na-eyi ebe nguzogide na arụ ọrụ ebe ọtụtụ ceramik ndị ọzọ enweghị ike ịrụ. Ọla na plastik enweghị ike iji ya tụnyere. Ọzọkwa, ceramics zirconia na-egosipụtakwa ike siri ike maka imepụta ngwaọrụ.

Ike

ZTA pụtara n'etiti ihe seramiiki nwere ike na ike ya pụrụ iche, eyi iguzogide, kemịkalụ inertness, ọnụ ala esemokwu, oke ike/isi ike yana ọnụọgụ mgbasawanye ọkụ dị obere ma e jiri ya tụnyere ọtụtụ ndị ọzọ – na-eme ka ọ bụrụ ihe dị mma maka ngwa ngwa dị ka ịcha ihe. Ọzọkwa, bioocompatibility ya na-emekwa ka ZTA bụrụ nhọrọ ihe mara mma.

A kọwapụtara ZTA site na nkesa nkesa tetragonal zirconia dị n'otu n'ime matriks alumina.. A na-arụzu nke a site na iji usoro agwakọta ọkaibe dị ka igwe igwe bọọlụ na igwe nri ike dị elu.; ozugbo agwakọta ọnụ, ntụ ntụ nwere ike guzobe n'ime ihe ha bu n'obi site na iji ịpị nkụ, isostatic ịpị, usoro ịkpụzi injection ma ọ bụ extrusion.

Zirconia gbasasịa n'ime matriks alumina na-eme ka ike mgbaji gbajiri agbaji site na ịmịnye na ịgbasa ike mgbape., mara dị ka mgbanwe toughening. Zirconia na-enyekwa aka na iyi nguzogide site n'iwepụta nrụgide mkpakọ nke na-egbochi ịgbasa mgbawa – mara dị ka nkọ onwe – na-eme ka ZTA bụrụ ihe magburu onwe ihe nhọrọ maka egweri wiil.

Isi ike

Zirconia aluminom siri ike (ZTA) ceramics na-anya isi ike na mgbaji siri ike, na-eme ka ha zuo oke maka ojiji n'ofe ngwa na gburugburu. Nkwụghachi azụ a dị ịrịba ama na-abịa site na ngbanwe oge nke mma na-akpata nrụgide, Ihe tetragonal zirconia gbasasịrị n'otu n'otu gbasasịa n'ime matriks alumina; Nchegbu na-akpalite mgbanwe nke oge iji mepụta netwọk microcrack nke zirconia-alumina nke na-etinye ike nke ịgbasa mgbasa nke ọma na-egbu oge mgbasa ha nke ọma ma na-abawanye nkwụsị mgbawa. (Clausen 1976).

ZTA pụtara ìhè n'ihi nkwụsi ike ya dị egwu. Ekele maka ngwakọta pụrụ iche nke tetragonal-monoclinic nke mejupụtara, seramiiki a nwere ike iguzogide mgbanwe ngwa ngwa na okpomọkụ na-enweghị mgbawa ma ọ bụ agbaji, ebe ngbanwe nke zirconia na-akpata nrụgide n'ime ụdị tetragonal metastable na-akpata nrụgide nrụgide nke na-egbochi nhazi nke mgbape n'ime matrix alumina ya ma na-abawanye ike siri ike wee na-abawanye arụmọrụ ZTA..

ZTA na-etu ọnụ ọ bụghị naanị ike ya, Ọdịdị tetragonal-monoclinic na nnukwu mgbaji siri ike, kamakwa ọnụọgụ dị ala nke mgbasawanye thermal (CTE), na-eme ka ọ dabara maka ngwa chọrọ oke okpomọkụ ma ọ bụ gburugburu ebe nkwụsi ike akụkụ dị oke mkpa, dị ka nkenke akụkụ ma ọ bụ eletrọnịkị ngwugwu.

ZTA pụtara ìhè n'etiti ihe ọkụkụ ọgwụ n'ihi nchikota kemịkalụ ya, Njirimara igwe na nrụgide na-enyere aka nguzogide corrosion na mmiri ma ọ bụ mmiri ahụ, na-eme ka ọ bụrụ onye bụ isi maka ntinye ahụike dịka isi femoral orthopedic na acetabular liners.. BioLOX Delta biomaterial bụ otu ihe atụ; ejiri ya mee ihe n'oge ịwa ahụ orthopedic maka ngwa abụọ ahụ.

Nguzogide corrosion

ZTA nwere ikike dị elu nke ma alumina na zirconia, na-eme ka ọ bụrụ nke ukwuu na-eguzogide ma ọgụ kemịkal na iyi, na-eme ka ọ bụrụ nke zuru oke maka ngwa ndị metụtara gburugburu ihe na-emebi emebi ma ọ bụ esemokwu ugboro ugboro ma ọ bụ nrụgide n'ibu.

Ijikọta ike nke alumina na ike nke zirconia na-arụpụta ezigbo tribological Njirimara nke na-eme ka ọ dị mma na-eguzogide iyi na akụrụngwa nwere ibu dị arọ na iji ogologo oge., dị ka orthopedic implants, ngwá ọrụ ịkpụ na iyi ihe ndị na-eguzogide ọgwụ na-eji na njikwa mmiri (eri ndu, bearings, nozzles wdg). Nchikota a na-adabara na ntọala ahụike na ụlọ ọrụ mmepụta ihe dị ka ọkpụkpụ ọkpụkpụ, ngwaọrụ ịkpụ ma ọ bụ njikwa mmiri mmiri (eri ndu bearings nozzles wdg).

Enwere ike ịsị na ike mgbaji agbajie nke ZTA nwere ike ịpụta na akụkụ zirconia ekesara nke ọma na matriks alumina ya.. Mgbe mgbawa na-amalite ịgbasa, mgbe ike ha na-abawanye ma na-agbasa n'ihu, Mkpụrụ ọka tetragonal zirconia ndị a na-agbanwe mgbanwe nke oge iji banye na ịgbasa ya dị ka akụkụ nke usoro mgbanwe mgbanwe. – ya mere na-emeziwanye ike mgbaji nke ihe a.

Ihe ịga nke ọma n'ichepụta ZTA seramiiki dabere na iji zirconia dị mma na ntụ ntụ alumina enweghị adịghị ọcha.. A ghaghị ịchịkwa Sintering iji zere mgbanwe tetragonal-to-monoclinic zirconia n'oge oyi na ibelata nhazi usoro monoclinic metastable nke nwere ike ịnweta chemisorption na mkpụrụ ndụ mmiri nke na-eduga n'ibelata okpomọkụ dị ala maka iji ogologo oge.; Saint-Gobain ZirPro's ZTA ceramic's sintering usoro emepụtara kpọmkwem iji zere ụdị ihe na-adịghị mma.. Luckily Saint-Gobain ZirPro ceramic's ZTA seramiiki emebere nke ọma iji gbochie ụdị ihe a na-eme. –

Thermal kwụsie ike

Zirconia aluminom siri ike (ZTA) nwere ike iguzogide mgbanwe ngwa ngwa na okpomọkụ na-enweghị mgbawa ma ọ bụ agbaji, ekele zirconia ụmụ irighiri ihe gbasasịrị n'ime alumina matrix na-amịkọrọ ike okpomọkụ ma na-eke nrụgide nrụgide nke na-egbochi mgbawa na ọdịda.. N'ihi na ZTA na-enweta ike ọkụ nke ọma, ihe a na-eme ka ọ bụrụ nhọrọ magburu onwe ya maka ngwa ndị na-achọ nguzogide okpomọkụ dị elu.

Mgbakwunye zirconia na matriks alumina nwere ike ịbawanye ike mgbaji ma na-emeziwanye ihe eji arụ ọrụ dị ka ike na iyi nguzogide.. Mmụba mgbawa siri ike na ZTA bụ ngbanwe nke nrụgide sitere na akụkụ tetragonal metastable gaa na usoro monoclinic na ọnọdụ okpomọkụ.; mmetụta na-abawanye site na nha ọka zirconia pere mpe karịa ndị dị na alumina.

A na-ejikarị ndị na-eme ihe nkwụsi ike na-echekwa oge zirconia tetragonal na ngwa ZTA dị ka Biolox Delta.; Otú ọ dị, yiri ya pụta nwere ike nweta na-enweghị stabilizers na okwu nke urughuru nkesa na mgbaji siri ike.

Ngwakọta nke alumina na zirconia na-emepụta seramiiki dị elu nke na-eme ka ike dị elu, mgbaji siri ike, elasticity na ike – njirimara dị mkpa maka ngwa chọrọ ịrụ ọrụ nhazi yana nguzogide corrosion. ceramik ZTA na-adịkarị karịa 99% alumina ceramics na-eri-irè mgbe na-ezute kpọmkwem ngwa chọrọ nke ọma karị; Enwere ike ịhazi oke ha kpọmkwem.