Isi ike na-enweghị atụ na alumina siri ike nke zirconia (ZTA) Ceramik
Zirconia aluminom siri ike (ZTA) ceramics na-anya isi ike na-enweghị atụ. Ha na-anya isi elu iyi iguzogide, kemịkalụ inertness na obere esemokwu maka ịrụ ọrụ na-enweghị mgbalị na ọrụ kwa ụbọchị – ọ bụghị ikwu okwu siri ike na isi ike karịa ọla.
ZTA na-agụnye metastable tetragonal zirconia polycrystal agglomerates na alumina matrix nke na-enwe nrụgide na-akpata mgbanwe n'oge mgbanwe na ụdị monoclinic n'okpuru nrụgide., si otú a na-achụsasị mkpari shiee ma kwụsị ịgbasa mgbasa, nke a na-akpọkarị mgbanwe toughening.
Na-eguzogide corrosion
ZTA na-enye nguzogide kemịkal dị elu ma e jiri ya tụnyere alumina dị ọcha ma nwee ike iguzogide oke okpomọkụ na-enweghị mmebi, na-eme ka ọ bụrụ ihe kachasị mma maka ngwa mmepụta ihe na gburugburu ebe obibi na ọnọdụ siri ike.
A na-eme ka ike ZTA dịkwuo mma site na irighiri ihe zirconia nke na-achụsa ma na-etinye ume, na-enyere aka igbochi mgbawa. Mgbe etinyere ya na yttrium oxide, zirconia na-agbanwe site na tetragonal metastable gaa na monoclinic n'oge nrụgide iji mepụta nrụgide mkpakọ nke na-abawanye ike mgbaji..
Seramik dabere na Zirconia dị ka ZTA nwere ahụ alumina iji guzogide ujo ọkụ. Nke a na-enye ya ohere iguzogide mgbanwe okpomọkụ ngwa ngwa na-enweghị mgbawa ma ọ bụ ọdịda na ngwa arụmọrụ dị elu dị ka egweri na ịkpụ; ya dị ala linear na torsional mgbasawanye na-enye ike ibu ibu pụtara ìhè na ike ịrụ ọrụ. ZTA na-anya isi 2-3 ugboro ike tensile siri ike ma e jiri ya tụnyere alumina dị ọcha ebe ọ na-enwe ọnụ ọgụgụ mgbasawanye linear/torsional dị ala maka ike ibu ibu na ike ịrụ ọrụ pụrụ iche..
Isi Isi Ike
ZTA na-ejikọta ike na ịdịte aka nke alumina na zirconia toughening maka ihe pụrụ iche maka ngwa na-achọsi ike.. Ngwakọta a na-enye ike na-enweghị atụ, mgbaji siri ike, elasticity na ike siri ike na otu ngwugwu.
Claussen chọpụtara na 1976 na-agbakwunye zirconia na-akwụghị ọtọ na alumina budata na-abawanye ike mgbaji ya, n'ihi mgbanwe tetragonal-monoclinic nke ezigbo tetragonal precipitates gbasasịrị n'ime matriks ya.. A na-egbochi mkpali metastable dị otú ahụ ka ọ ghara ịgbanwe ruo mgbe a ga-ewepụta ya site n'ihu mgbape na-abịaru nso ma ọ bụ ihe enyemaka ọzọ na-enye aka na mmachi ha., dị ka site n'ịgbaze.
zirconia kwụsiri ike 10mol% yttria kwụsiri ike (10YSZ), agbadoro site na particulates ma ọ bụ platelet nwere si 0 ruo 30wt% alumina ọdịnaya ka edobere ike siri ike, mgbaji siri ike na ule ịgbawa ngwa ngwa na 1000C na ikuku. Ihe nchoputa gosiputara na ike ngbanwe kacha na ike mgbaji maka ihe mejupụtara platelet ka ejiri ọdịnaya nke a nweta..
Ike Tensile dị elu
Zirconia ceramics na-enye ngwakọta pụrụ iche nke ike, resilience, na ngbanwe nke kariri seramiki teknụzụ ọdịnala. Usoro Zirconia dị ka ZTA na-enye azịza maka ngwa kachasị sie ike taa sitere na akụrụngwa ikuku na-edi gburugburu gburugburu ebe obibi siri ike ruo ọgbọ na-esote biomedical implants emebere maka ogologo ndụ. – na-enye ngwọta a pụrụ ịdabere na ya maka mkpa kachasị mkpa taa.
ZTA pụtara n'etiti ihe ndị ọzọ n'ihi ike mgbanwe ya dị elu, mgbaji siri ike na iguzogide mgbasa nke mgbawa n'ihi oge tetragonal metastable ya. Mgbanwe a n'ime zirconia monoclinic na obere okpomọkụ na-eme ka mpaghara ahụ dị n'ihu n'ihu mgbawa iji kwụsị uto ọzọ.
Yttria Zirconia kwụsiri ike nke ọma (Y-TZP) na Cerium Zirconia kwụsiri ike nke ọma (Gịnị-TZP) na-egosipụta àgwà siri ike pụrụ iche nke yiri ZTA n'ihi njide oge tetragonal site na idowe yttria ma ọ bụ cerium na okpomọkụ dị ala., na-enye ohere mgbanwe n'ụdị ọnọdụ okpomọkụ a na-ejikwa ma na-egosi obere mmebi elu n'oge ule ntinye cyclic karịa ndị otu Alumina..
Esemokwu dị ala
Zirconia bụ otu n'ime seramiki injinia siri ike dị na njirimara esemokwu ya dị ala na-enyere aka ịbawanye nguzogide iyi ka na-ebelata ihe achọrọ mmanu mmanu..
ceramik ZTA nwere alumina maka ike siri ike. Nke a na-enye ohere yttria-stabilised tetragonal zirconia particles na alumina matrix ka ọ nọgide na-agbanweghị agbanwe., nke fọdụrụ crystalized site n'ịdị mma nke netwọk kpara akpa nke ọka.
Usoro nhazi na nhazi nke a na-achịkwa na-achọpụta na mgbanwe tetragonal-na-monoclinic na-apụtaghị ìhè adịghị eme ma ọ dị jụụ site na ikpo ọkụ., na-enye aka n'ikike ọtụtụ ihe ọkụkụ na nnwale ike mgbaji. Ọzọkwa, nnukwu homogeneity na alumina-zirconia mejupụtara nwere obere nha ọka na-eme ka ike mgbape dị ala nke na-atụgharị gaa na ogologo mgbape dị mkpụmkpụ n'oge ule ntinye diamond..
Mgbasawanye okpomọkụ dị elu
Alumina matriks na-ejikọta ike na-enyere ya aka igbochi tetragonal zirconia irighiri ihe ịga nke ọma n'ime zirconia monoclinic mgbe jụrụ oyi., si otú eme 10 ahumachi % yttria-stabilized zirconia-alumina composites kwụsiri ike na mgbawa n'efu.
Mgbakwunye cerium na zirconia na-enye ohere ka ọ kwụsie ike (Gịnị-TZP). Ce-TZP na-edobe akụkụ tetragonal ya na okpomọkụ ụlọ ma na-abawanye ike nke ukwuu, mgbaji siri ike na ike mgbanwe atụnyere ihe seramiiki eze ọdịnala.
Zirconia Toughened Alumina mejupụtara na-agụnye Ce-TZP, zirconia yttria kwụsiri ike (Y-TZP), ma ọ bụ zirconia kwụsiri ike na Magnesia (Mg-PSZ) na-egosipụta ike siri ike nke karịrị nke ma alumina na monolithic zirconia, na-eme ZTA ka ọ bụrụ onye ndoro-ndoro nke ọma maka ngwa ndị na-achọ ngwa dị ka ntinye ọgwụ, akụkụ aerospace na ígwè ọrụ mmepụta ihe. ZTA nwekwara ọtụtụ ihe na-eguzogide ọgwụ na-echebe ya pụọ na acids, ngwọta nnu, nnu a wụrụ awụ alkalis yana oke okpomọkụ.