Magnesium aluminium spinel (MgAl2O, MgO · Al2Oor MA) ifite imiterere yubushyuhe bwo hejuru bwo hejuru, irwanya neza cyane kandi irwanya ruswa.Nibisanzwe byubushyuhe bwo hejuru cyane muri sisitemu ya Al2O-MgO.Iterambere ryibanze rya calcium hexaaluminate (CaAl12O19, CaO · 6AlO cyangwa CA6) ibinyampeke bya kirisiti ku ndege ya basal bituma ikura ikaba platine cyangwa urushinge rwa morfologiya, rushobora kuzamura cyane ubukana bwibintu.Kalisiyumu ikora (CaAlO cyangwa CaO · 2Al203, CA2) ifite coefficient nkeya yo kwagura ubushyuhe.Iyo CAz ihujwe nibindi bikoresho bifite aho bishonga cyane hamwe na coefficient yo kwaguka, irashobora kurwanya ibyangiritse biterwa nubushyuhe bwumuriro.Kubwibyo, ibice bya MA-CA byitabiriwe cyane nkubwoko bushya bwibikoresho byo hejuru byubushyuhe bwo mu kirere mu nganda z’ubushyuhe bwo hejuru kubera imiterere yuzuye ya CA6 na MA.
Muri iyi nyandiko, MA ceramic, MA-CA2-CA ceramic compratique hamwe na MA-CA ceramic ceramic yateguwe nubushyuhe bwo hejuru bwo mu cyiciro cya sinteri, kandi ubushakashatsi bwakozwe ningaruka za minervalizeri kumiterere yibi bikoresho byubutaka.Haganiriwe ku buryo bwo gushimangira imyunyu ngugu ku mikorere y’ubutaka, maze haboneka ibisubizo by’ubushakashatsi bikurikira:
.Nyuma yo gucumura kuri 1600 kuri 2h imikorere yicyaha ya MA ceramic yari ikennye, hamwe nubucucike bwinshi bwa 3. 17g / cm3 nagaciro kangana na133.31MPa.Hamwe no kwiyongera kwamabuye y'agaciro Fez03, ubwinshi bwibikoresho bya MA ceramic bwiyongereye buhoro buhoro, kandi imbaraga za flexural zabanje kwiyongera hanyuma ziragabanuka.Iyo amafaranga yinyongera yari 3wt.%, imbaraga zihindagurika zageze kuri 209. 3MPa.
.Ukoresheje ingano ntoya ya CaCO hamwe nubuziranenge bwinshi a-AlzO3 nkibikoresho fatizo, nyuma yo gucumura kuri 1600 ℃ no gufata 2h, ceramic ya MA-CA6 ceramic ifite imbaraga zikomeye zo guhinduka.Ingano yubunini bwa CaCO3 igira uruhare runini mugushinga icyiciro cya CA no gukura no guteza imbere ibinyampeke bya kristu mubikoresho byubutaka bwa MA-CA6.Ku bushyuhe bwinshi, umwanda Si muri a-Alz0 uzakora icyiciro cyamazi cyigihe gito, bigatuma morphologie yintete za CA6 ihinduka kuva kuri platine ikagera.
.Byagaragaye ko (Mg-Zn) AI2O4 igisubizo gikomeye hamwe na boron irimo icyiciro cyamazi cyakozwe na minervalizeri ZnO na Mg (BO2) z ituma ingano ya MA iba nto kandi ibikubiye muri MA byiyongera.Ibi byiciro byuzuye bishyizwe hamwe na microcrystalline MA kugirango bigire imibiri yuzuye itatanye mu karere, biganisha ku guhindura ibinyampeke bya CA6 mo ibinyampeke bingana, bityo bigateza imbere ubwinshi bwibikoresho by’ubutaka bwa MA-CA no kunoza imbaraga zabyo.
.Ingaruka za minisiteri SnO₂ na HBO kumiterere yumubiri nubukanishi, microstructure hamwe nibice bigize ibice byakozwe.
Ibisubizo byerekana ko igisubizo gikomeye hamwe na boron irimo feri yigihe gito igaragara mubintu bya ceramic nyuma yo kongeramo minervalizeri SnO2 na H2BO;muburyo bukurikira, butuma icyiciro cya CA2 gihinduka mukiciro cya CA kandi byihutisha ishingwa rya MA na CA6, bityo bikazamura ibikorwa byo gucumura ibikoresho byubutaka.Icyiciro cyinshi cyakozwe na Ca irenze ituma isano iri hagati yintete za MA na CA6, ikanoza imiterere yubukorikori bwibikoresho byubutaka
Igihe cyo kohereza: Kanama-29-2023