Umphumela wokusila ezimpahleni ze-zirconia ceramics

Umphumela wokusila ezimpahleni ze-zirconia ceramics

Njengohlobo lwezinto zobumba, i-zirconium inamandla aphezulu, ubulukhuni obuphezulu, ukumelana nokuguguleka okuhle, ukumelana ne-asidi ne-alkali, ukumelana nokushisa okuphezulu kanye nezinye izakhiwo ezinhle kakhulu. Ngaphezu kokusetshenziswa kabanzi emkhakheni wezimboni, ngentuthuko enamandla yemboni yamazinyo okufakelwa eminyakeni yamuva nje, ama-zirconia ceramics abe yizinto zobumba zokufakelwa ezingaba khona kakhulu futhi adonsele ukunaka kwabacwaningi abaningi.

Ukusebenza kwe-zirconia ceramics kuzothinteka yizici eziningi, namuhla sikhuluma ngomthelela wokusila kwezinye izakhiwo ze-zirconia ceramics.

Indlela yokuhlanza

Indlela yendabuko yokusila iwukushisa umzimba ngokusebenzisa imisebe yokushisa, ukuqhutshwa kokushisa, ukufudumeza, ukuze ukushisa kusuke ebusweni be-zirconia kuye ngaphakathi, kodwa ukuqhutshwa kokushisa kwe-zirconia kubi kakhulu kunokwe-alumina nezinye izinto zobumba. Ukuze kuvinjelwe ukuqhekeka okubangelwa ukucindezeleka kokushisa, ijubane lokushisa lendabuko lihamba kancane futhi isikhathi side, okwenza umjikelezo wokukhiqiza we-zirconia ube mude futhi izindleko zokukhiqiza ziphezulu. Eminyakeni yamuva nje, ukuthuthukisa ubuchwepheshe bokucubungula be-zirconia, ukunciphisa isikhathi sokucubungula, ukunciphisa izindleko zokukhiqiza, kanye nokuhlinzeka ngezinto zobumba ze-zirconia zamazinyo ezisebenza kahle kakhulu kube yinto ebalulekile ocwaningweni, futhi ukusila nge-microwave ngokungangabazeki kuyindlela ethembisayo yokusila.

Kutholakale ukuthi ukushiswa kwe-microwave kanye nokushiswa kwengcindezi yomoya akunawo umehluko omkhulu ethonyeni lokungangeni kahle kwe-semi-permeability kanye nokumelana nokuguguleka. Isizathu ukuthi ubuningi be-zirconia obutholakala ngokushiswa kwe-microwave bufana nobokushiswa okuvamile, futhi kokubili kushiswa okuqinile, kodwa izinzuzo zokushiswa kwe-microwave izinga lokushisa eliphansi lokushiswa, isivinini esisheshayo kanye nesikhathi esifushane sokushiswa. Kodwa-ke, izinga lokushisa lokwenyuka kokushiswa kwengcindezi yomoya lihamba kancane, isikhathi sokushiswa side, kanti isikhathi sonke sokushiswa cishe singamahora angu-6-11. Uma kuqhathaniswa nokushiswa kwengcindezi okuvamile, ukushiswa kwe-microwave kuyindlela entsha yokushiswa, enezinzuzo zesikhathi esifushane sokushiswa, ukusebenza kahle okuphezulu kanye nokonga amandla, futhi ingathuthukisa isakhiwo esincane sezinto zobumba.

Ezinye izazi zikholelwa nokuthi i-zirconia ngemva kokushisa nge-microwave ingagcina isigaba se-tequartet esizinzile kakhulu, mhlawumbe ngoba ukushisa okusheshayo kwe-microwave kungafinyelela ukuqina okusheshayo kwezinto ezisetshenziswayo ekushiseni okuphansi, usayizi wezinhlamvu mncane futhi uyafana kakhulu nowe-pressure sintering evamile, uphansi kunosayizi wokuguqulwa kwesigaba esibucayi se-t-ZrO2, okusiza ukugcina okuningi ngangokunokwenzeka esimweni esizinzile ekushiseni kwegumbi, kuthuthukiswe amandla nokuqina kwezinto zobumba.

Inqubo yokucwilisa kabili

I-zirconia ceramics ezihlanganisiwe ezisikiwe ingacutshungulwa kuphela ngamathuluzi okusika i-emery ngenxa yobunzima namandla aphezulu, futhi izindleko zokucubungula ziphezulu futhi isikhathi side. Ukuze kuxazululwe izinkinga ezingenhla, ngezinye izikhathi i-zirconia ceramics izosetshenziswa kabili inqubo yokusikiwe, ngemva kokwakheka komzimba we-ceramic kanye nokusikiwe kokuqala, umshini wokukhulisa we-CAD/CAM uye esimweni esifunwayo, bese usikiwe uye ekushiseni kokugcina kokusikiwe ukuze wenze izinto zibe nzima ngokuphelele.

Kutholakale ukuthi izinqubo ezimbili zokusinta zizoshintsha i-kinetics yokusinta ye-zirconia ceramics, futhi zizoba nemiphumela ethile ekujuleni kokusinta, izakhiwo zemishini kanye nesakhiwo esincane se-zirconia ceramics. Izakhiwo zemishini ze-zirconia ceramics ezisintayo ezishisiwe uma seziqinile zingcono kunezo ezisintayo kabili. Amandla okugoba kwe-biaxial kanye nokuqina kokuphuka kwe-zirconia ceramics ezisintayo uma sezihlanganisiwe ziphakeme kunezo ezisintayo kabili. Imodi yokuphuka kwe-zirconia ceramics eziyinhloko ezisintayo i-transgranular/intergranular, futhi ukuqhekeka kuqondile. Imodi yokuqhekeka kwe-zirconia ceramics ezisintayo kabili ikakhulukazi i-intergranular fracture, futhi umkhuba wokuqhekeka unzima kakhulu. Izakhiwo zemodi yokuqhekeka ehlanganisiwe zingcono kunemodi yokuqhekeka elula ye-intergranular.

I-vacuum yokuthungula

I-Zirconia kumele ishiswe endaweni engenamanzi, enkambisweni yokushisa izokhiqiza inani elikhulu lamabhamuza, futhi endaweni engenamanzi, amabhamuza kulula ukuwakhipha esimweni esincibilikisiwe somzimba we-porcelain, kuthuthukiswe ubuningi be-zirconia, ngaleyo ndlela kwandiswe ukuvuleka okuncane kanye nezakhiwo zemishini ze-zirconia.

Izinga lokushisa

Enqubweni yokushisisa i-zirconia, ukuze kutholakale ukusebenza okuhle nemiphumela elindelekile, kufanele kusetshenziswe izinga lokushisa eliphansi. Izinga lokushisa eliphezulu lenza izinga lokushisa langaphakathi le-zirconia lingalingani lapho lifinyelela izinga lokushisa lokugcina lokushisisa, okuholela ekubonakaleni kwemifantu kanye nokwakheka kwama-pores. Imiphumela ikhombisa ukuthi ngokwanda kwesilinganiso sokushisa, isikhathi sokukristalisa samakristalu e-zirconia siyafinyezwa, igesi phakathi kwamakristalu ayikwazi ukukhishwa, futhi ama-porosity ngaphakathi kwamakristalu e-zirconia ayanda kancane. Ngokukhula kwesilinganiso sokushisa, inani elincane lesigaba sekristalu se-monoclinic liqala ukuba khona esigabeni se-tetragonal se-zirconia, okuzothinta izakhiwo zemishini. Ngesikhathi esifanayo, ngokwanda kwesilinganiso sokushisa, amagremu azohlukaniswa, okungukuthi, ukuba khona ndawonye kwamagremu amakhulu namancane kulula. Izinga lokushisa elihamba kancane lisiza ekwakhekeni kwamagremu afanayo, okwandisa ukugeleza kwe-zirconia.