ʻO Zirconia Alumina Paʻa

ʻO ka alumina paʻakikī Zirconia (ZTA) ʻO ia kahi mea seramika holomua i hoʻohana nui ʻia i nā sila valve, nā lāʻau, nā ʻāpana pauma a me nā mea hana ʻokiʻoki ma muli o kona ikaika a paʻa kemika – e like me ka mea i hōʻike ʻia e kona hiki ke kū i nā ukana kaumaha me ka ʻole o ka hōʻino nui ʻana.

Hāʻawi ʻo ZTA i ke kūpaʻa haʻalulu wela a hiki ke pale i ka hoʻololi koke ʻana i nā loli wela, a me ka wikiwiki o ka wela. E heluhelu e aʻo hou aku e pili ana i kona mau pono mechanical!

ʻoʻoleʻa

ʻO Zirconia i hoʻohui ʻia i kahi matrix alumina e hoʻonui i kona paʻakikī, ʻo ka paʻakikī haʻihaʻi a me ka ikaika flexural ʻoiai e hoʻonui ana i ke kūpaʻa ʻana i ka ʻaʻahu a me ka erosion. ʻO ke ʻano hana maʻamau ʻo ia ka hoʻololi ʻana i ka pae a ukali ʻia e ka hoʻokumu ʻana o ka microcrack akā hiki ke komo pū i nā kumumanaʻo koʻikoʻi e like me ka pili..

Hiki i ka metastable tetragonal zirconia ke hoʻopuehu maikaʻi i loko o kahi matrix alumina hiki ke hoʻololi i nā ʻano monoclinic i ka wā i hāpai ʻia ai ko lākou kaohi i ka wā o ka hoʻolaha ʻana., ka hāʻawi ʻana i ka ikehu e kūʻē i nā kahua koʻikoʻi e hoʻolaha ana i ka māwae.

He ʻoi aku ka paʻakikī a me ka paʻakikī o ka ZTA ceramic i hoʻohālikelike ʻia me nā mea hana ʻenekinia oxide, a me ka ʻelua o ka ikaika luhi cyclic o Y-TZP. E like me ia, ʻO kāna mau waiwai kūpono ia no nā noi e koi ana i ke kūpaʻa ʻoi loa, kemika inertness a me ka haʻahaʻa friction a me ka ikaika kiʻekiʻe a me ka ʻoʻoleʻa.

Ikaika Flexural

Hiki ke hana ʻia nā ceramics ZTA ma ka hoʻololi ʻana i ka ratio o yttria stabilized zirconia (Y-TZP) i loko o kahi matrix alumina me ka hoʻohana ʻana i ke kaomi isostatic wela, e hoʻopololei i nā hui pū ʻana o ka paʻakikī-haʻihaʻi a me ka ikaika flexural e hopena ai i ke kūpaʻa luhi cyclic like ʻole ma mua o nā seramika ʻenehana kiʻekiʻe loa..

Metastable Y-TZP i loko o ka alumina matrix ka hopena i ka hoʻokumu ʻia ʻana o nā ʻāpana hoʻololi tetragonal-monoclinic agglomerates e hoʻonui ai i ka paʻakikī o ka haʻihaʻi ma o ka hoʻololi ʻana o ka pae. (Clausen 1976). ʻOi aku ka maikaʻi e hele i nā māwae, ʻO kēia mau agglomerates hoʻololi e hoʻopaʻa i ka ʻāpana ma mua o ke alo o ka pohā a hoʻemi i kona holomua, e hoʻonui i ka paʻakikī o ka haʻihaʻi.

Ua alakaʻi kēia ʻano mea i ka hana ʻana o nā alumina-zirconia composites e like me BIOLOX Delta, hoʻohana nui ʻia no ka hoʻololi ʻana i ka ʻūhā a me nā ʻāpana orthopedic ʻē aʻe. Hāʻawi kēia biomaterial ceramic i ke kūpaʻa ʻaʻahu, kemika inertness ma ka lumi wela, ʻO ke kūpaʻa haʻalulu wela a me ka inertness kemika maikaʻi loa i nā mahana āpau.

Pale ʻino

Kemika inert a kū'ē i nā wela kiʻekiʻe a me ka lole, hāʻawi ia i ka hana ʻoi aku ka maikaʻi ma mua o 99 alumina seramika a ʻoi aku ka maikaʻi o ke kumu kūʻai.

Hāʻawi ʻo Zirconia i ka ikaika tensile kupaianaha, flexural a elasticity waiwai a me ka biocompatibility – i mea kūpono no ka hoʻohana ʻana i nā lāʻau lapaʻau e like me nā pani pani. Ma muli o ka hoʻololi paʻakikī ma lalo o nā kūlana koʻikoʻi, Hoʻololi nā ʻāpana zirconia mai ke ʻano tetragonal metastable i ke ʻano monoclinic, kōkua i ka pani ʻana i nā māwae ʻoi aku ka maikaʻi me ka hoʻonui ʻana i ka paʻakikī haʻi.

ʻO CeramTec (ʻO Biolox Delta) kūʻai kūʻai aku i ka alumina-zirconia composite kahi i hoʻopaʻa ʻole ʻia ka zirconia i loko o ka pae tetragonal e hoʻokele i kēia hoʻololi a hāʻawi i ka puʻupuʻu māwae a me ka haʻihaʻi ʻana., hoʻomaikaʻi i ka paʻakikī o ka alumina matrix. Hiki ke hoʻololi ʻia ka maʻiʻo Zirconia ma o ka hoʻomākaukau ʻana i ka pauka a me nā ʻenehana densification.

ʻO ke kū ʻana i ka haʻalulu wela

Hoʻohui ʻia ʻo Zirconia i kahi matrix alumina mua i ka wā sintering hiki ke hoʻonui nui i kona ikaika a paʻakikī, e hana ana i ka mea i kapa ʻia ʻo ZTA (ʻO Zirconia Alumina Paʻa), ʻoi aku ka maikaʻi o ka alumina seramika maʻamau i ka mīkini a me ka hoʻohana ʻana i nā noi.

ʻIke ʻia ʻo Zirconia toughened alumina no kāna mau waiwai ʻokoʻa e like me ka wela wela kiʻekiʻe a me ka ikaika rapture, kemika inertness ma ka lumi wela, haʻahaʻa haʻahaʻa hoʻonui haʻahaʻa haʻahaʻa a me ke kūpaʻa haʻalulu maikaʻi loa – nā waiwai kūpono no ka wili ʻana i nā ʻāpana a me nā ʻāpana ʻaʻahu e koi ana i nā mīkini hoʻomaha.

Ke kūʻai aku nei ʻo CeramTec i kahi ZTA i kapa ʻia ʻo Biolox delta e hōʻike ana i kahi matrix alumina me nā ʻāpana Y-TZP i hoʻopuehu ʻia. (17 kaumaha/wt%) a me strontium aluminate platelets (0.5 kaumaha/wt%), ka hāʻawi ʻana i kahi hui maikaʻi o nā ʻano hana hoʻololi ʻana i ka tetragonal-to-monoclinic a me nā mīkini deflection crack e hāʻawi i ka ʻoi aku ka paʻakikī., ʻo ia ka mea i kūpono no nā kaʻina hana THA mua ma nā ʻaoʻao o ka wahine.

Hoʻokohu Uila

Hiki iā Zirconia-toughened alumina ke kū i ka haʻalulu wela me ka haki ʻole a haki ʻole paha ma lalo o nā loli koke o ka mahana, mahalo i nā ʻāpana alumina i hoʻopuehu ʻia i loko o kāna matrix e hoʻomoʻa i ka ikehu wela a hoʻoulu i nā koʻikoʻi compressive e pale ai i nā haki..

ʻOi aku ka paʻakikī o ka alumina-zirconia ceramic ma mua o kāna hui zirconia maʻemaʻe, hana ia mea kūpono no ka hoʻohana ʻana i ka uila. Eia kekahi, ʻO kona hoʻonui haʻahaʻa haʻahaʻa haʻahaʻa ma mua o ka zirconia e kūpono ia no nā ʻāpana e koi ana i ka hoʻomaha.

ʻO ka hoʻololi ʻana i ka paʻakikī o nā alumina-zirconia composites e hāʻawi i nā pono hou aʻe; maanei, ʻO nā hua zirconia i loko o kahi matrix alumina e loaʻa i kahi pae metastable kahi e hoʻololi ai kā lākou mau kīʻaha mai ka tetragonal a hiki i nā hale monoclinic, no laila e ho'ēmi ana i ka pohā ma muli o ka hoʻonui ʻana i ke kūʻē ʻana i ka abrasion a me ka hopena. ʻO ka zirconia paʻakikī alumina e hana maʻamau ma o ka hopena pyrophoric e pili ana i ka Zirconium(IV) oxide octahydrate, Aluminum Nitrate Nanohydrate Triethylamine a me HNO3(ʻAka Nitric); ʻO ka hoʻonui ʻana i ka nui o nā ʻāpana e kōkua hou aku i ka hoʻopuehu ʻana o nā huaʻai zirconia metastable.