Paʻa Paʻa no nā Hana Hana Hana

ʻO Zirconia Alumina Paʻa (ZTA) Hoʻohui nā ʻāpana seramika i ka paʻakikī a me ka ikaika o ka alumina me ka zirconia ʻoi aku ka paʻakikī o ka haʻihaʻi e hoʻopuka i ka hana a me ka lōʻihi no nā noi ʻoihana..

ʻO ka hoʻololi ʻana i ke koʻikoʻi o nā ʻāpana zirconia tetragonal maikaʻi i hoʻokomo ʻia i loko o kahi matrix alumina e alakaʻi i nā mea ZTA me ka ikaika a me ka paʻakikī., kūpono no ka hoʻohana ʻana i nā ʻano ʻino like ʻole.

ʻoʻoleʻa

Hoʻohui nā mea ZTA i ka paʻakikī o ka alumina me ka paʻakikī o ka zirconia no ka pale ʻole ʻana i ka ʻaʻahu a me ka abrasion.. Hiki kēia hopena ma o ka hoʻololi ʻana i ke koʻikoʻi: ke kaumaha, zirconia particles transition from their metastable tetragonal phase in stable monoclinic form; volume expansion caused by this structural change helps close any cracks within an alumina matrix and increase toughness significantly.

ZTA contains zirconia platelets that nucleate into an alumina matrix during sintering, improving fracture toughness and strength while increasing fracture toughness, creating a material with greater flexural strength than Y-TZP and up to twice its cyclic fatigue strength. This combination of toughness from alumina combined with zirconia strength makes ZTA an excellent material choice for industrial applications requiring damage resistance.

Durability

ʻO Zirconia Alumina Paʻa (ZTA) boasts outstanding flexural and compressive strengths, with low thermal expansion equivalent to that of alumina and outstanding wear resistance properties.

Hoʻokumu ʻia ka alumina paʻakikī Zirconia ma ka hoʻohui ʻana i nā hua zirconia tetragonal ma o ka hoʻololi ʻana i ke kaumaha i kahi matrix alumina paʻakikī., e hoʻopili ana iā lākou i loko o kona ʻano ʻoiai e kaohi ana i ko lākou hoʻololi ʻana i nā wahi kūloko ma mua o ka laha ʻana a puni.

Hana kēia mīkini i nā alumina-zirconia composites i ʻoi aku ka lōʻihi ma mua o ka monolithic zirconia ma muli o ko lākou kūʻē ʻana i ka hoʻoheheʻe wai ma o ka chemisorption.; Hiki i ka monolithic zirconia ke komo i nā molekule wai polar e alakaʻi i ka haʻahaʻa haʻahaʻa haʻahaʻa a hiki i ka haki ʻana ma hope o ka hoʻohana lōʻihi..

ZTA, ma ka lima ʻē aʻe, ua hoʻonohonoho pono ʻia e hoʻomaʻamaʻa i kēia hoʻololi tetragonal-to-monoclinic ma o nā hiʻohiʻona hana a me nā mea hoʻohui kemika.. Ke kūʻai aku nei ʻo CeramTec iā Biolox Delta ZTA ma ke ʻano he laʻana; Aia i loko o kēia hoʻolālā ka yttria a me ka strontium aluminate e hoʻomaʻamaʻa i nā mīkini paʻakikī i loko o kāna pae zirconia a no laila ʻoi aku ka liʻiliʻi o ka hoʻohaʻahaʻa haʻahaʻa haʻahaʻa ʻoiai ke kū nei i nā wahi wela kiʻekiʻe..

Pale ʻino

Hāʻawi ka ZTA ceramics i ke kūpaʻa corrosion ʻoi aku ka maikaʻi ma mua o kā lākou mau alumina a no laila hiki ke hoʻohana ʻia i nā mea hana e pili ana i nā wahi paʻakikī.. Eia kekahi, Hiki iā ZTA ke pale i nā mahana kiʻekiʻe aʻe i ka hāʻawi ʻana i ka paʻa kemika ʻoi aku ka nui.

ʻO Garvie et al (1975) hōʻike i kēlā hoʻohui 10-20% hiki i ka zirconia unstabilized ke hoʻoikaika nui i ka paʻakikī i hoʻohālikelike ʻia me ka alumina, ma o ka hoʻololi ʻana i ka paʻakikī. Hana ʻia kēia kaʻina hana i ka wā e hoʻopuehu maikaʻi ʻia ai nā ʻeke tetragonal metastable e lilo i monoclinic zirconia ma lalo o ke koʻikoʻi e hoʻonui ai i ka leo e hoʻopaʻa i nā māwae a hoʻolohi a hoʻōki paha i kā lākou hoʻolaha..

Ua like kēia ʻano me nā koʻikoʻi i hoʻokomo ʻia i ka deformation; akā naʻe, i mea e hiki ai ke hoʻololi i ka māhele, pono e lawa ka nui o ke kahua koʻikoʻi; no nā māwae i nā hiʻohiʻona ZTA e loaʻa mai kēia ikehu mai nā koʻikoʻi piko ma nā wahi haʻihaʻi.

Kū'ē wela

Hāʻawi ʻo Zirconia Toughened Alumina i kahi helu hoʻoheheʻe kiʻekiʻe a me ka pale ʻana i ka corrosion, e hoʻolilo iā ia i mea kūpono no nā mea hana i ʻike pinepine ʻia i nā wela kiʻekiʻe. Eia kekahi, ʻOi aku ka ʻoi aku o kēia ʻokoʻa ma mua o ka alumina maʻamau, kōkua i ka hōʻemi ʻana i ka ʻaʻahu a me ka waimaka ma nā mea hana i ʻike ʻia i nā pae kiʻekiʻe o ka ikehu kinetic.

Hoʻokumu ʻia nā seramika ZTA ma o ka hoʻololi ʻana i ke koʻikoʻi o nā ʻāpana zirconia tetragonal i kahi matrix alumina., hana ʻana i nā koʻikoʻi koʻikoʻi i loko o ia mau mea e pale ai i ka hoʻolaha ʻana o ka māwae, e hoʻonui ana i ka ikaika a me ka paʻakikī i ka hāʻawi ʻana i ke kūpaʻa haʻalulu wela me ka ʻole o ka haki ʻana a i ʻole ka pohā. Hāʻawi lākou i ke kūpaʻa haʻalulu wela maikaʻi loa; pale ʻana i nā loli wikiwiki o ka mahana me ka ʻole o ka haki ʻana a i ʻole ka pohā ma lalo o ke kaumaha.

He nui ka hoʻohana ʻana o ka alumina Zirconia-toughened ma nā ʻoihana he nui ma muli o kāna ʻano nui o nā waiwai. Hoʻohana ʻia e ka ʻenekinia mīkini no nā ʻāpana pamu a me nā sila; Hoʻohana ʻia ka hana semiconductor ma muli o kona kūpaʻa wela a me ka ikaika; aerospace, Hoʻohana ʻia nā ʻoihana kaʻa a me nā ʻoihana e like me nā ʻāpana ʻenekini ma muli o kona kū kūʻē ʻana i ka corrosion a me nā kemika paʻakikī.; hiki iā ia ke pale i nā ikaika flexural kiʻekiʻe no nā implants niho!