Magnesium aluminum spinel (MgAl2O, MgO · Al2Oor MA) yana da m high zafin jiki inji Properties, m peeling juriya da lalata juriya.Shine yumbu mafi yawan yanayin zafi a cikin tsarin Al2O-MgO.Mafi fifikon ci gaban calcium hexaluminate (CaAl12O19, CaO · 6AlO ko CA6) hatsin lu'ulu'u tare da jirgin basal yana sa ya girma zuwa kwayar halittar platelet ko allura, wanda zai iya haɓaka taurin kayan.Calcium dialluminate (CaAlO ko CaO · 2Al203, CA2) yana da ƙarancin haɓakar haɓakar thermal.Lokacin da aka haɗa CAz tare da wasu kayan tare da babban ma'anar narkewa da babban haɓakar haɓakawa, yana iya tsayayya da lalacewa ta hanyar girgizar zafi.Saboda haka, abubuwan haɗin MA-CA sun sami kulawa mai yawa azaman sabon nau'in kayan yumbu mai zafin jiki a cikin masana'antar zafin jiki mai zafi saboda cikakkun kaddarorinsa na CA6 da MA.
A cikin wannan takarda, MA yumbura, MA-CA2-CA yumbu composites da MA-CA yumbu composites aka shirya ta high zafin jiki m-lokaci sintering, da kuma tasiri na mineralizers a kan kaddarorin da wadannan yumbu kayayyakin.An tattauna tsarin ƙarfafawa na ma'adinai a kan aikin yumbura, kuma an sami sakamakon bincike mai zuwa:
(1) Sakamakon ya nuna cewa yawancin yawa da ƙarfin sassauƙa na kayan yumbura MA sun karu a hankali tare da haɓakar zafin jiki.Bayan sintering a 1600 don 2h aikin sintiri na MA yumbu mara kyau ba shi da kyau, tare da girman girman 3. 17g/cm3 da ƙimar ƙarfin sassauƙa na 133.31MPa.Tare da haɓakar ma'adinan Fez03, yawan nauyin kayan yumbura MA ya karu a hankali, kuma ƙarfin sassauƙa ya fara ƙaruwa sannan ya ragu.Lokacin da ƙarin adadin ya kasance 3wt.%, ƙarfin sassauƙa ya kai matsakaicin 209. 3MPa.
(2) A yi da kuma lokaci abun da ke ciki na MA-CA6 yumbu suna da alaka da barbashi girman CaCO da a-AlO albarkatun kasa, da tsarki na a- Al2O3, da zazzabi na kira da kuma rike lokaci.Yin amfani da ƙananan girman girman CaCO da babban tsabta a-AlzO3 azaman albarkatun ƙasa, bayan sintiri a 1600 ℃ da riƙe don 2h, yumbura MA-CA6 da aka haɗa yana da ƙarfin sassauƙa.The barbashi size na CaCO3 taka muhimmiyar rawa a samuwar CA lokaci da kuma girma da kuma ci gaban da crystal hatsi a MA-CA6 yumbu kayan.A babban zafin jiki, ƙazanta Si a cikin a-Alz0 zai samar da wani lokaci na ruwa na wucin gadi, wanda ke sa ƙirar halittar ƙwayar CA6 ta samo asali daga platelet zuwa daidaitacce.
(3) Sakamakon ma'adinan ZnO da Mg (BO2) z akan kaddarorin abubuwan MA-CA da kuma tsarin ƙarfafawa an bincika.An gano cewa (Mg-Zn) AI2O4 m bayani da boron-dauke da ruwa lokaci kafa ta Mineralizers ZnO da Mg (BO2) z sa hatsi size na MA karami da abun ciki na MA ya karu.Wadannan m bulan suna mai rufi da microcrystalline MA barbashi don samar da yanki tarwatsa m jiki, wanda take kaiwa zuwa ga canji na CA6 hatsi cikin equiaxed hatsi, don haka inganta densification na MA-CA yumbu kayan da inganta ta flexural ƙarfi.
(4) Ta hanyar amfani da tsantsar tsantsa Al2Oin maimakon a-AlzO, MA-CA2-CA abubuwan haɗin yumbu an haɗa su daga kayan albarkatun ƙasa masu tsafta.Sakamakon ma'adinan SnO₂ da HBO akan kayan aikin jiki da na inji, microstructure da tsarin lokaci na abubuwan da aka haɗa.
Sakamakon ya nuna cewa m bayani da boron-dauke da wucin gadi ruwa lokaci bayyana a cikin yumbu abu bayan ƙara mineralizers SnO2 da H2BO;bi da bi, yana sa canjin lokaci na CA2 ya canza zuwa CA lokaci kuma yana haɓaka samuwar MA da CA6, don haka inganta aikin sintiri na kayan yumbura.Matsakaicin lokacin da aka kafa ta wuce gona da iri na Ca yana sanya haɗin gwiwa tsakanin hatsin MA da CA6 mai ƙarfi, wanda ke haɓaka kayan injin yumbura.
Lokacin aikawa: Agusta-29-2023