ʻO Zirconia Alumina Paʻa – Hoʻonui i ka ikaika no ka ʻoihana maikaʻi

ʻO Zirconia Alumina Paʻa (ZTA) he seramika kūikawā, ʻike ʻia e ka paʻakikī kiʻekiʻe a me ka haʻihaʻi ʻana ma muli o ka yttria stabilized zirconia particles i hoʻopuehu ʻia ma o ka alumina matrix.

Hiki i kēia mea ke kū i ka hoʻololi wikiwiki ʻana me ka ʻole o ka haki ʻana a i ʻole ka haki ʻana, kū'ē i ka ʻino kemika a hāʻawi maikaʻi i ke kūpaʻa haʻalulu wela.

Kūleʻa ʻino maikaʻi loa

Hāʻawi ka ZTA ceramics i kahi kaulike kūpono ma waena o ka ikaika a me ka waiwai, ʻoi aku ka ikaika ma mua o nā huahana alumina akā ʻoi aku ka liʻiliʻi ma mua o ka zirconia maʻemaʻe. ʻO kā lākou mau waiwai mechanical – ʻoʻoleʻa haʻihaʻi, ka ikaika flexural a me ka paʻakikī a me ke kūpaʻa haʻalulu wela – e hoʻolilo iā lākou i kūpono no ka hana ʻana i nā mea hana ʻoihana e like me ka ʻoki huila.

Loaʻa ʻo ZTA i kāna mau waiwai maikaʻi ma muli o ka hoʻohui ʻana o yttria stabilized zirconia (YSZ) nā ʻāpana i loko o kahi matrix alumina. Ke hoʻopuehu ʻia a puni, Kōkua ʻo YSZ i ka hoʻopaʻa ʻana i ka paʻakikī paʻakikī a me ka ikaika tensile o nā mea ʻelua e hopena i ke kūpaʻa ʻokoʻa., kemika inertness ma ka lumi wela a me ka wela o ka paakiki/rapture ikaika waiwai no kekahi mea keramika okoa.

Nā huahana ZTA’ ʻO nā waiwai mechanical e hilinaʻi nui i ko lākou ala hana no ka hana ʻana i nā pauka, me nā lāʻau wela, nā ʻano calcination, ʻenehana hoʻomaloʻo a me nā kaʻina hana sintering a me ka hoʻohālikelike ʻia me nā mea hoʻohui i hoʻohui ʻia i ka wā hana. He hopena koke kēia mau mea a pau i ko lākou ikaika, elasticity a me ka paakiki.

Kūleʻa Haʻalulu Thermal maikaʻi loa

Hāʻawi ʻo ZTA ceramics i ke kūpaʻa haʻalulu wela maikaʻi loa, e hoʻolilo iā lākou i koho maikaʻi loa no nā noi aerospace e koi ana i nā pae kiʻekiʻe o ka ikaika, ʻoʻoleʻa, a me ka inertness kemika. Ke hoʻopuehu like ʻia i loko o kahi pahu alumina YSZ hiki ke hoʻonui ʻia. ʻO kekahi o ia ʻano zirconia-alumina ceramic i hoʻololi ʻia a mākou e hāʻawi nei ʻo BIOLOX delta hiki ke loaʻa i hoʻohana ʻia no nā mea lawe ukana orthopedais e like me nā pani pani..

ʻO ka hoʻololi ʻana i ke koʻikoʻi mai ka tetragonal metastable a hiki i ke ʻano monoclinic o YSZ e hoʻonui i ka leo a me ke kānana ʻāwili e kūʻē i ka hoʻolaha ʻana o ka māwae., hoʻonui i ka paʻakikī o ka haʻihaʻi ʻoiai e hoʻomaikaʻi ana i ka ikaika flexural i ka manawa like. ʻO ka hana ʻana o ia alumina-YSZ hoʻololi-koʻikoʻi seramika e hilinaʻi ʻia i nā kūlana kaʻina a me kāna stoichiometry o nā oxides constituent i ke kaʻina sintering..

ʻO nā kūlana sintering maikaʻi ʻole ka hopena i ka ikaika flexural haʻahaʻa a me ka homogeneity maikaʻi ʻole o kahi matrix alumina-YSZ., ma muli paha o ka hoʻopaʻa ʻia ʻana o ka ea a i ʻole ka hoʻohui ʻana o nā ʻāpana. Ma ka hoʻohui ʻana i nā mea hoʻohui e like me yttria a i ʻole magnesium oxides, Hiki i kekahi ke hoʻemi i ka tetragonal i ka monoclinic transformation temperature a hoʻonui i nā waiwai sintering o zirconia.

Kūleʻa Wear maikaʻi loa

ʻAʻole maikaʻi wale ʻo ZTA ma ke ʻano o ke kūpaʻa haʻalulu wela a me ke kūpaʻa corrosion, akā ʻaʻole hiki ke hoʻopaʻa ʻia ma muli o kāna ʻano hoʻololi hoʻololi ʻana o ka tetragonal-monclinic. Eia kekahi, ua hōʻike ʻia nā haʻawina in vitro he liʻiliʻi ka maʻalahi o nā ʻāpana ZTA i ka hydrothermal degradation – kekahi mea koʻikoʻi i ka hoʻololi ʻana i ke poʻo femoral a me nā kīʻaha kīʻaha (e like me BIOLOX delta i hana ʻia e CeramTec).

ʻO nā hoʻāʻo ʻaʻahu i hoʻohālikelike ʻia i hana ʻia ma nā ʻāpana ZTA i hana ʻia me nā mea alumina-zirconia composite i hoʻopuka i nā hopena maikaʻi loa e pili ana i ke kūpaʻa ʻaʻahu., ikaika flexural a me ka paakiki. Hōʻike nā hōʻailona ZTA i nā pōʻai he nui i ka simulator hip i hōʻike ʻia i ka hōʻemi liʻiliʻi me ka haʻahaʻa haʻahaʻa haʻahaʻa ma mua o nā mea monolithic zirconia..

Ua hōʻoia ʻia nā ʻāpana ZTA kūpono no ka noi ʻana i nā noi i ka hana ʻenehana (mea paahana hana wela a anu, hiki-pani wili a me capstans); ʻoihana ikehu (nā bearings, nā mea hoʻokomo puka a me nā mea ʻimi vortex); hana ʻai (homogenizing pump parts); a me ka ʻoihana ikehu. ʻO kā lākou mau waiwai mechanical e pili ana i nā loli he nui: nā ala hoʻomākaukau i hoʻohana ʻia no ka hoʻomākaukau ʻana i nā pauka; hoʻohana ʻia i ka wā calcination; nā ʻenehana hoʻohua i hoʻohana ʻia i ka wā o ka ʻenehana sintering; hoʻolikelike ʻia; nā mea hoʻohui i hoʻohui ʻia a me ka hāʻawi ʻana i ka nui o nā ʻāpana i waena o nā mea ʻē aʻe.

Ka ikaika maikaʻi loa

Hoʻohana ka ZTA ceramics i ka hoʻololi ʻana i ke koʻikoʻi e hoʻohui i ka zirconia i loko o kahi matrix alumina, hoʻonui i ka ikaika a me ka lōʻihi i ka manawa. Hoʻolilo kēia iā ZTA i kahi hopena seramika maikaʻi loa no nā noi ʻoihana e koi ana i ka paʻakikī, kiʻekiʻe corrosion kū'ē, ka hoʻomanawanui haʻalulu a me ka hoʻomanawanui haʻalulu.

Ma lalo o ke kaumaha, ʻO ka hoʻoheheʻe ʻana o ka metastable tetragonal i loko o ka alumina cubic e hoʻololi koke ʻia i loko o nā ʻāpana monoclinic e hoʻonui ai i ka paʻakikī o ka haʻihaʻi ʻana ma o ka hana ʻana i nā papa compressive surface e pili ana i nā māwae i loko o kāna matrix..

ʻO ka hoʻololi ʻana i ka paʻakikī kahi mea i ʻike ʻia ʻo ka fracture toughening, kahi i hoʻonui ʻia ai ka paʻakikī haʻihaʻi o ka alumina i ka lōʻihi o ka māwae pōkole, liʻiliʻi ka māwae ʻōpuʻu, a hoʻomaikaʻi i nā pilina me nā microcracks mua. Hāʻawi kēia i ka hui pū ʻana o ka paʻakikī paʻakikī a paʻakikī hoʻi i hoʻohana ʻia i nā seramika lāʻau lapaʻau hou e like me nā pani pani.. Eia kekahi, Hāʻawi ka Yttrium stabilized zirconia implants i kapa ʻia ʻo y-TZP i ka pale mai ka ʻaʻahu ʻana i ka manawa.