Ibumba rya silicon carbide rifite imbaraga z'ubushyuhe bwinshi, rirwanya oxidation y'ubushyuhe bwinshi, rirwanya kwangirika neza, rituje neza, rituma ubushyuhe burushaho kwaguka, rituma ubushyuhe burushaho kwiyongera, rituma ubushyuhe burushaho gukomera, rituma ubushyuhe burushaho gukomera, rituje cyane, rituje cyane, rirwanya ingese n'ibindi bintu byiza. Rikoreshwa cyane mu modoka, imashini, kurengera ibidukikije, ikoranabuhanga mu by'indege, ikoranabuhanga mu itumanaho, ingufu n'ibindi, kandi ryabaye bumba ridashobora gusimburwa rifite imikorere myiza mu nganda nyinshi. Reka nkwereke!
Gutera umwuka udafite igitutu
Gucukura nta muvuduko bifatwa nk'uburyo bwiza cyane bwo gucukura SiC. Dukurikije uburyo butandukanye bwo gucukura, gucukura nta muvuduko bishobora kugabanywamo gucukura mu buryo busanzwe n'uburyo bwo gucukura mu buryo bw'amazi. Binyuze muri β- Ingano ikwiye ya B na C (umuvuduko wa ogisijeni uri munsi ya 2%) byongewe ku ifu ya SiC icyarimwe, maze s. proehazka icukurwa ku mubiri wacukurwa SiC ufite ubucucike buri hejuru ya 98% kuri 2020 ℃. A. Mulla et al. Al2O3 na Y2O3 bakoreshejwe nk'inyongera kandi bacukura ku bushyuhe bwa 1850-1950 ℃ kuri 0.5 μ m β- SiC (ubuso bw'uduce duto burimo ingano nto ya SiO2). Ubucucike bw'ibinyabutabire bya SiC byabonetse buruta 95% by'ubucucike bw'ibitekerezo, kandi ingano y'ingano ni nto kandi ni ingano mpuzandengo. Ni mikoroni 1.5.
Gushyushya imashini ikoresha icyuma gishyushye
SiC y'umwimerere ishobora gutogoshwa gusa ku bushyuhe bwinshi cyane nta nyongeramusaruro zikoreshwa mu gutogoshwa, bityo abantu benshi bashyira mu bikorwa uburyo bwo gutogoshwa bushyushye kuri SiC. Hari raporo nyinshi zatanzwe ku buryo bwo gutogoshwa bushyushye bwa SiC bongeramo ibikoresho byo gutogoshwa. Alliegro n'abandi. Bize ku ngaruka za boron, aluminiyumu, nikeli, icyuma, chromium n'ibindi byuma bikoreshwa mu gutogoshwa kwa SiC. Ibisubizo bigaragaza ko aluminiyumu n'icyuma ari byo byunganira ingirakamaro mu guteza imbere SiC ikoreshwa mu gutogoshwa. FFlange yize ku ngaruka zo kongeramo ingano itandukanye ya Al2O3 ku miterere ya SiC ikoreshwa mu gutogoshwa. Bifatwa ko gutogoshwa kwa SiC ikoreshwa mu gutogoshwa bifitanye isano n'uburyo bwo gushonga no kugwa kw'imvura. Ariko, uburyo bwo gutogoshwa bushobora gusa gukora ibice bya SiC bifite imiterere yoroshye. Ingano y'ibicuruzwa bikorwa n'uburyo bwo gutogoshwa bukoreshwa mu gutogoshwa ni nto cyane, ibyo bikaba bidafasha mu nganda.
Gushyushya cyane bikandagira mu gukamura ibintu bishyushye
Kugira ngo hakemurwe inenge zo mu buryo gakondo bwo gusya, ubwoko bwa B na C byakoreshejwe nk'inyongeramusaruro, hanakoreshwa ikoranabuhanga ryo gusya rishyushye rya isostatic. Ku bushyuhe bwa 1900 ° C, habonetse ibumba ryiza rya crystalline rifite ubucucike burenga 98, kandi imbaraga zo kugonda ku bushyuhe bw'icyumba zashoboraga kugera kuri 600 MPa. Nubwo gusya bishyushye bya isostatic bishobora gutanga umusaruro w'ibice byinshi bifite imiterere igoye kandi bifite imiterere myiza ya mekanike, gusya bigomba kuba bifunze, ibyo bikaba bigoye kubigeraho mu nganda.
Gutera ingaruka mbi
Karubide ya silikoni ikoreshwa mu gukora ibintu bitandukanye, izwi kandi nka karubide ya silikoni ikorana n’umuntu, yerekeza ku buryo billet ifite imyenge ikorana n’umwuka cyangwa amazi kugira ngo yongere ubwiza bwa billet, igabanye porosity, kandi ibicuruzwa bya sinter bikozwe mu buryo bufatika kandi bunoze. Ifu ya take α- SiC na grafiti bivangwa mu rugero runaka bigashyuha kugeza kuri 1650 ℃ kugira ngo bikore billet kare. Muri icyo gihe, yinjira cyangwa yinjira mu billet binyuze muri Si gaze hanyuma igakorana na grafiti kugira ngo ikore β- SiC, hamwe n’uduce twa α- SiC turiho. Iyo Si yinjiyemo burundu, umubiri wa sintered reaction ufite ubucucike bwuzuye kandi ingano idahindagurika irashobora kuboneka. Ugereranyije n’izindi nzira zo gushonga, impinduka mu bunini bwa reaction sintering mu nzira yo gushonga ni nto, kandi ibicuruzwa bifite ingano nyayo birashobora gutegurwa. Ariko, kuba hari ingano nini ya SiC mu mubiri wa sintered bituma imiterere y’ubushyuhe bwinshi bwa SiC ceramics ya reaction sintered irushaho kuba mibi.
Igihe cyo kohereza: Kamena-08-2022