A matsayin wani nau'in kayan yumbu, zirconium yana da ƙarfi mai yawa, tauri mai yawa, juriyar lalacewa mai kyau, juriyar acid da alkali, juriyar zafin jiki mai yawa da sauran kyawawan halaye. Baya ga amfani da shi sosai a fannin masana'antu, tare da ci gaban masana'antar haƙoran haƙora mai ƙarfi a cikin 'yan shekarun nan, yumburan zirconia sun zama kayan haƙoran haƙora mafi yuwuwa kuma sun jawo hankalin masu bincike da yawa.
Hanyar yin sintering
Hanyar da aka saba amfani da ita wajen yin siminti ita ce a dumama jiki ta hanyar amfani da hasken zafi, hanyar watsa zafi, da kuma hanyar watsa zafi, ta yadda zafin zai kasance daga saman zirconia zuwa ciki, amma yanayin watsa zafi na zirconia ya fi muni fiye da na alumina da sauran kayan yumbu. Domin hana tsagewa da matsin lamba na zafi ke haifarwa, saurin dumama na gargajiya yana da jinkiri kuma lokaci yana da tsawo, wanda hakan ke sa zagayowar samar da zirconia ta yi tsawo kuma farashin samarwa yana da yawa. A cikin 'yan shekarun nan, inganta fasahar sarrafa zirconia, rage lokacin sarrafawa, rage farashin samarwa, da kuma samar da kayan yumbu na zirconia na haƙori masu inganci sun zama abin da bincike ya mayar da hankali a kai, kuma simintin microwave babu shakka hanya ce mai kyau ta simintin.
An gano cewa yin amfani da microwave sintering da kuma yin amfani da iskar gas a yanayin zafi ba su da wani bambanci mai mahimmanci kan tasirin da ke tattare da iskar gas a cikin microwave sintering da kuma juriyar lalacewa. Dalilin shi ne cewa yawan zirconia da ake samu ta hanyar microwave sintering yayi kama da na gargajiya sintering, kuma duka biyun sintering ne mai yawa, amma fa'idodin yin amfani da microwave sintering sune ƙarancin zafin jiki, saurin sauri da kuma ɗan gajeren lokacin sintering. Duk da haka, yawan zafin jiki na sintering mai matsin lamba a yanayi yana da jinkiri, lokacin sintering ya fi tsayi, kuma duk lokacin sintering yana da kusan awanni 6-11. Idan aka kwatanta da sintering mai matsin lamba na yau da kullun, sintering na microwave sabuwar hanyar sintering ce, wacce ke da fa'idodin gajeren lokacin sintering, ingantaccen aiki da adana kuzari, kuma tana iya inganta tsarin yumbu.
Wasu masana kuma sun yi imanin cewa zirconia bayan yin amfani da microwave sintering na iya kiyaye yanayin tequartet mai narkewa, wataƙila saboda dumama mai sauri na microwave na iya samun saurin yawa na kayan a ƙananan zafin jiki, girman hatsi ya ƙanƙanta kuma ya fi daidaito fiye da na sintering na matsin lamba na yau da kullun, ƙasa da girman canjin lokaci mai mahimmanci na t-ZrO2, wanda ke taimakawa wajen kiyaye gwargwadon iko a yanayin metastable a zafin ɗaki, inganta ƙarfi da tauri na kayan yumbu.
Tsarin tacewa sau biyu
Ana iya sarrafa ƙananan yumburan zirconia masu sintered ne kawai da kayan aikin yanke emery saboda tsananin tauri da ƙarfi, kuma farashin sarrafawa yana da yawa kuma lokaci yana da tsawo. Domin magance matsalolin da ke sama, wani lokacin ana amfani da yumburan zirconia sau biyu a tsarin sintering, bayan samuwar jikin yumbu da sintering na farko, injin ƙara girman CAD/CAM zuwa siffar da ake so, sannan a yi sintering har zuwa zafin sintering na ƙarshe don sanya kayan ya yi kauri sosai.
An gano cewa hanyoyin yin sintering guda biyu za su canza yanayin sintering na yumburan zirconia, kuma za su yi tasiri kan yawan sintering, halayen injiniya da ƙananan tsarin yumburan zirconia. Halayen injiniya na yumburan zirconia masu injin da aka yi wa sintering sau ɗaya sun fi waɗanda aka yi wa sintering sau biyu. Ƙarfin lanƙwasawa ta biyu da tauri na karyewar ƙarfe na zirconia masu injin da aka yi wa sintering sau ɗaya sun fi waɗanda aka yi wa sintering sau biyu. Yanayin karyewar ƙarfe na yumburan zirconia masu sintered shine transgranular/intergranular, kuma bugun tsagewa yana da madaidaiciya. Yanayin karyewar ƙarfe na yumburan zirconia masu sintered sau biyu galibi shine karyewar ƙarfe ta tsakiya, kuma yanayin tsagewa ya fi tsauri. Halayen yanayin karyewar ƙarfe sun fi sauƙi yanayin karyewar ƙarfe ta tsakiya.
Injin tsabtace iska
Dole ne a yi wa zirconia siminti a cikin muhallin da babu hayaki, a cikin tsarin simintin ...
Yawan dumama
A cikin tsarin simintin ...
Lokacin Saƙo: Agusta-15-2023