Wonjezerani Kukhazikika Ndi Zirconia Toughened Alumina Components

ZTA ceramics imapereka zinthu zapamwamba kwambiri za tribological poyerekeza ndi zoumba za alumina wamba, kuwapanga kukhala abwino kusankha zida kudula, mayendedwe, mapampu ndi zigawo zoyendetsera madzimadzi.

Pansi pa nkhawa, Zirconia particles amasintha kuchoka ku metastable tetragonal crystal crystals kupita ku monoclinic, kutulutsa kuchuluka kwa voliyumu komwe kumapangitsa ming'alu ya alumina matrix ndikuwongolera kwambiri kulimba kwa fracture.

Valani Kukaniza

Zirconia Toughened Alumina (ZTA) ndi chinthu cholimba kwambiri. Imatha kupirira abrasion kapena kuvala kwamphamvu popanda kuwonongeka; kuzipanga kukhala chinthu chabwino kusankha mawilo kudula. Komanso, ZTA imatha kupirira kutentha kwambiri popanda kuwonongeka kapena kuchepetsedwa.

ZTA imalimbana kwambiri ndi dzimbiri, kuzipanga kukhala chinthu chabwino kwambiri kusankha ma implants azachipatala. Biocompatible ndipo imatha kupirira kukhudzana ndi madzi amthupi, ZTA ilinso ndi mphamvu zosinthika kwambiri – wangwiro kwa m'chiuno ntchito m'malo.

ZTA imapangidwa kudzera mu kusinthika kwapang'onopang'ono kwa tinthu tating'ono ta tetragonal zirconia kukhala mawonekedwe a monoclinic.. Izi zimawonjezera kulimba kwa fracture pokulitsa malo ozungulira ming'alu. Motero, ZTA imatsimikizira kuti ndi yamphamvu kwambiri komanso yolimba kuposa alumina pazovala.

Kukaniza kwa Corrosion

Zirconia Toughened Alumina (ZTA) ndi zipangizo zamakono za ceramic zomwe zimagwiritsidwa ntchito kwambiri m'makampani chifukwa cha mphamvu zake, kulimba, kuvala kukana komanso kukana dzimbiri. ZTA imapeza ntchito m'magawo ambiri kuphatikiza zamagalimoto ndi zakuthambo pazinthu monga zida za injini, ma turbines a gasi ndi zida zamakina pomwe akugwira ntchito ngati zida zamapampu, zisindikizo ndi zida zodulira zomwe zimagwiritsidwa ntchito pamakina. Maopaleshoni azachipatala amathanso kugwiritsa ntchito izi chifukwa cha kuyanjana kwake ndi biocompatibility.

Kukhazikika kwazinthu izi kumabwera chifukwa chakusintha kwake komwe kumapangitsa kupsinjika, momwe tinthu tating'onoting'ono ta zirconia mu alumina matrix amasinthidwa kukhala mawonekedwe a monoclinic kudzera pakupsinjika komwe kumapangitsa kusintha kulimba., kuthandizira kutseka ming'alu ndikuwonjezera kulimba kwa fracture, motero kudziteteza ku zowonongeka m'madera osiyanasiyana monga phosphoric acid, sulfuric acid ndi madzi osungunuka. Izi zimathandiza kuti zisawonongeke.

Mphamvu Zapamwamba

Kuphatikiza alumina ndi zirconia kumabweretsa mphamvu yowonjezereka ndi kulimba kwa fracture poyerekeza ndi alumina wamba, kupanga ZTA kukhala chisankho chabwino kwambiri pazinthu zomwe zimakhudzidwa ndi kutsitsa. Komanso, ZTA imadzitamandiranso kwambiri kukana dzimbiri kwamankhwala.

ZTA ili ndi kuuma kopambana ndi mphamvu chifukwa cha kusintha kwa tinthu tating'onoting'ono ta zirconia kukhala makhiristo a monoclinic kudzera mukusintha komwe kumapangitsa kupsinjika ndikusintha kwamakina kapena kusinthasintha kwa kutentha., ndi kukakamizidwa kotsatira kuchokera ku monoclinic zirconia crystal mapangidwe kukakamiza matrix a alumina, kuwapatsa mphamvu zazikulu, kukhazikika, ndi kukana kutentha kwa kutentha.

Ceramic yapaderayi ilinso ndi mphamvu yopindika kwambiri komanso kutsika kwamafuta ochepa, kupangitsa kuti ikhale yabwino pamapulogalamu omwe amafunikira njira zozizirira. Komanso, kukana kwake ku mankhwala owononga – kuphatikizapo madzi a m’thupi – imapangitsa ma implants azachipatala kukhala oyenera kuyika mkati mwa anthu popanda chiwopsezo chakuwonongeka pakapita nthawi kulola odwala kusangalala ndi zokumana nazo zabwino popanda kudandaula za kuwonongeka kwa implant pakapita nthawi..

Kulimba Kwambiri

ZTA Ceramics zimathandizira kulimba kwa alumina kudzera mukusintha kwamphamvu kwa tinthu ta zirconia kukhala zabwino., zimatheka kudzera pa sintering ndi kutentha kwa isostatic (HIP). Kutengera kuchuluka kwa zirconia komwe kuli mu matrix ake, ZTA ikhoza kukhala ndi zotsika kapena zolimba kwambiri.

Clausen akuwonetsedwa mu 1976 kuti ma matrices a alumina okhala ndi zirconia osakhazikika amatha kulimba kuti apititse patsogolo zida zamakina pophatikiza makristalo osakhazikika a zirconia monga mafunde omwazika bwino., monga omwe amapangidwa kuchokera ku makristasi osakhazikika a zirconia, kukonza makina katundu. Anatsimikizira mfundo imeneyi pogwiritsa ntchito kufalitsa kwa crack; when cracks moved forward through the material and compressed its zone ahead of their tip they could transform to monoclinic phase and convert to it more readily than otherwise would happen otherwise.

This toughening mechanism increases flexural strength and fracture toughness of alumina while simultaneously increasing hardness, creating an unparalleled composite material suitable for applications requiring high hardness, stiffness, fracture resistance and cooling requirements such as industrial cutters, milling wear parts or cooling components.