Ibumba rya alumina ridashobora kwangirikani ibikoresho bya keramike bigezweho bigizwe ahanini na alumina ifite isuku nyinshi (Al₂O₃). Byabaye ibikoresho by'ingenzi mu guhangana n'ubushyuhe bwinshi, ingese, n'ubushyuhe bwinshi bitewe n'ubukomere bwayo budasanzwe, kudashira kwayo, no kudashira kwayo neza. Ugereranyije n'ibikoresho bisanzwe birwanya kwangirika kw'ibyuma, byongerera cyane igihe cyo gukoresha ibikoresho kandi bigabanya inshuro n'ikiguzi cyo kubibungabunga mu nzego nyinshi z'inganda, bikaba igisubizo cy'ingenzi ku nganda kuva ku ngufu n'ibyuma kugeza ku nganda zigezweho.
Imikorere yayo idasanzwe ishingiye ku makuru nyayo n’ay’ibinyabutabire. Ubukana bwa Rockwell (HRA) bwa alumina ceramic bushobora kugera kuri 80-90, imbaraga zo gukanda zirenga 850 MPa. Ibizamini by’abahanga bigaragaza ko idashira inshuro 266 z’icyuma cya manganese n’inshuro 171.5 z’icyuma gifite chromium nyinshi. Ku bijyanye no kudashira ubushyuhe, ubushyuhe bwayo burambye bushobora kugera kuri 300°C, kandi ishobora kwihanganira aside na alkali mu rugero rwa pH kuva kuri 3 kugeza kuri 12. Iyi miterere ituma ikora neza ahantu hafite ingaruka nyinshi, hadashira cyane kandi hangirika, urugero, yongera igihe cyo gukora imiyoboro itwara ifu y’amakara inshuro zirenga 10.
Uburyo alumina ceramic idashobora kwangirika bugira ingaruka ku kugenzura neza inzira yose kuva ku bikoresho fatizo kugeza ku gusya. Ubwa mbere, ifu ya alumina mbisi isya neza cyane, aho ubunini bw'uduce busanzwe bugenzurwa munsi ya mikoroni 1, bigatuma ingano y'uduce ikwirakwira neza kandi ikwirakwira neza. Uburyo bw'ibanze bwo gukora burimo gukandwa byumye no gukandwa isostatic, ibi bikaba bitanga ubucucike bungana ku mubiri w'icyatsi. Amaherezo, umubiri w'icyatsi ushwanyaguzwa hafi 1700°C, bigakora imiterere minini ya crystalline, hamwe n'ubucucike bw'ibikoresho bigera kuri 95%. Imiterere ya composite, nko kongeramo zirconia (ZrO₂), ishobora kongera ubushobozi bwayo bwo kudakora neza no gukomera.
Ibi bikoresho bikoreshwa cyane mu nganda nyinshi. Mu nganda zikora ingufu no kurengera ibidukikije, bikoreshwa mu miyoboro y'ifu y'amakara yo mu nganda zikoresha ubushyuhe, no mu byiciro n'udupira tw'insinga za sima, byongera igihe cyo gukoresha ibikoresho inshuro 3 kugeza kuri 5. Mu nganda zikora ibyuma n'ubucukuzi bw'amabuye y'agaciro, imiyoboro ya ceramic ishyirwa mu miyoboro y'amakara yo mu itanura ry'ibitunguru n'imiyoboro ikuraho umukungugu irwanya neza ibikoresho bikomeye nk'ifu y'icyuma, bigabanya ikiguzi cyo kubungabunga ku mwaka kugeza kuri 60%. Byongeye kandi, ifu ya alumina iri hejuru cyane (urugero, 99.7%) nayo ikoreshwa mu nganda zikora ibikoresho byo mu rwego rwo hejuru nko gusiga irangi rya semiconductor wafer.
Igihe cyo kohereza: Ukuboza-19-2025