Zirconia taurin Alumina – Ƙarfin Ƙarfi don Ƙarfin Masana'antu
Zirconia taurin Alumina (ZTA) yumbu na musamman ne, bambanta ta babban tauri da juriya na karaya saboda yttria stabilized zirconia barbashi da aka tarwatsa ta hanyar matrix alumina..
Wannan abu zai iya jure wa canje-canjen zafin jiki mai sauri ba tare da tsagewa ko karya ba, yana tsayayya da lalata sinadarai kuma yana ba da kyakkyawan juriya na zafin zafi.
Kyakkyawan Juriya na Lalata
ZTA yumbura yana ba da ma'auni mai kyau tsakanin ƙarfi da ƙima, kasancewa da ƙarfi fiye da samfuran alumina amma ƙasa da tsada fiye da zirconia mai tsabta. Kaddarorin injin su – karaya tauri, Ƙarfin sassauƙa da taurin kai gami da juriyar girgiza zafi – sanya su dace don yin kayan aikin masana'antu kamar yankan ƙafafun.
ZTA yana samun manyan kaddarorin sa saboda ƙari na yttria stabilized zirconia (YSZ) barbashi a cikin matrix alumina. Lokacin da aka watse a ko'ina, YSZ helps optimise both hardness-fracture toughness and tensile strength of both elements resulting in exceptional wear resistance, chemical inertness at room temperature and hot hardness/rapture strength properties for an exceptional ceramic material.
ZTA products’ mechanical properties depend heavily on their processing routes for producing powders, including heat treatments, calcination methods, drying techniques and sintering processes as well as tailored shaping with additives added during production. All these factors have an immediate effect on their strength, elasticity and hardness properties.
Excellent Thermal Shock Resistance
ZTA ceramics offer excellent thermal shock resistance, making them an excellent choice for aerospace applications that demand high levels of strength, tauri, and chemical inertness. Lokacin da aka tarwatsa iri ɗaya a cikin matrix alumina YSZ ana iya inganta shi. Ɗaya daga cikin irin wannan canji-tauraron yumbura zirconia-alumina da muke bayarwa shine BIOLOX delta wanda za'a iya samuwa don amfani da kayan aiki na orthopedais kamar maye gurbin hip..
Canjin da ke haifar da damuwa daga metastable tetragonal zuwa tsarin monoclinic na YSZ yana samar da haɓaka girma da nau'in juzu'i wanda ke magance yaduwa., ƙara ƙarfi taurin karaya yayin da lokaci guda inganta ƙarfin sassauƙa. Aiwatar da irin wannan alumina-YSZ yumbu mai kauri mai ƙarfi ya dogara da yanayin sarrafawa da kuma stoichiometry na abubuwan oxides a cikin tsarin sintering..
Ingancin yanayin sintirin sarrafawa na iya haifar da ƙarancin ƙarfin sassauƙa da rashin daidaituwa na matrix alumina-YSZ, mai yuwuwa saboda kamawar iska ko gurɓataccen barbashi. Ta hanyar ƙara abubuwa kamar yttria ko magnesium oxides, mutum na iya rage tetragonal zuwa yanayin canjin yanayin monoclinic kuma ya haɓaka kaddarorin sintirin zirconia.
Kyakkyawan Juriya na Sawa
ZTA ba wai kawai ta yi fice ba ta fuskar juriyar girgiza zafi da juriya na lalata, amma kuma yana da juriya sosai saboda tsarin canza yanayin tetragonal-monclinic. Bugu da kari, Nazarin in vitro ya nuna cewa abubuwan da ke cikin ZTA ba su da haɗari ga lalata ruwa – wani abu mai mahimmanci a maye gurbin hip ɗin femoral head da kofin yumbu (kamar BIOLOX delta wanda CeramTec ya samar).
Gwaje-gwajen lalacewa da aka yi a kan abubuwan ZTA da aka yi da kayan haɗin gwiwar alumina-zirconia sun ba da sakamako mai ban sha'awa dangane da juriya na lalacewa., flexural ƙarfi da taurin. Samfuran ZTA da aka fallasa zuwa zagayawa da yawa a cikin na'urar kwaikwayo ta hip sun nuna ƙarancin lalacewa tare da ƙarancin ƙarancin ƙasa fiye da abubuwan haɗin zirconia na monolithic..
Abubuwan ZTA sun tabbatar da dacewa da buƙatun aikace-aikace a masana'antar kera motoci (zafi da sanyi kafa kayan aiki, iya-rufe rollers da capstans); masana'antar makamashi (bearings, abubuwan da aka saka orifice da masu gano vortex); sarrafa abinci (homogenizing famfo sassa); da kuma masana'antar makamashi. Abubuwan injin su sun dogara da masu canji da yawa: hanyoyin shirye-shiryen da ake amfani da su don shirya foda; hanyoyin bushewa da ake amfani da su a lokacin calcination; dabarun siffatawa da aka karɓa a lokacin dabarun sintering; wanda aka keɓe; Additives kara da kuma barbashi size rarraba da sauransu.
Kyawawan Ƙarfi
ZTA yumbura suna amfani da canji mai haifar da damuwa don haɗa zirconia cikin matrix alumina., ƙara ƙarfi da karko a kan lokaci. Wannan ya sa ZTA ya zama kyakkyawan maganin yumbu don aikace-aikacen masana'antu da ke buƙatar tauri, high lalata juriya, Hakuri na girgiza thermal da juriya na girgiza thermal.
Karkashin damuwa, Tetragonal metastable hazo a cikin alumina mai siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar siffar..
Ƙunƙarar canji al'amari ne da aka sani da ƙarfin karaya, inda ƙara taurin alumina ke haifar da guntun tsaga, kasa fasa blunting, da ingantattun hulɗa tare da microcracks da suka rigaya. Wannan yana ba da damar haɗaɗɗen ɗawainiya mai ƙarfi da taushi waɗanda ake amfani da su a cikin yumbu na zamani na likitanci kamar maye gurbin hip.. Bugu da kari, Yttrium stabilized zirconia implants da aka sani da y-TZP yana ba da kariya daga lalacewa akan lokaci.