Gushyiraho 5% kugeza kuri 10% (igice cy'uburemere) Al2O3 mu gice cy'amatafari ya karuboni/grafiti yo mu itanura (uduce twa karuboni) byongera cyane ubudahangarwa bw'icyuma gishongeshejwe kandi ni ugukoresha amatafari ya karuboni ya aluminiyumu mu buryo bwo gukora icyuma. Icya kabiri, amatafari ya karuboni ya aluminiyumu nayo akoreshwa mu gutunganya icyuma gishongeshejwe mbere yo kuvura no mu miyoboro y'amazi.
Amatafari ya aluminiyumu ya karuboni yo gutunganya icyuma gishongeshejwe mbere yo kuyatunganya
Amatafari ya aluminiyumu ya silikoni akoreshwa cyane cyane mu bikoresho byo gutwara ibyuma bishongeshejwe nk'ibigega by'icyuma bishongeshejwe. Ariko, iyo ubwo bwoko bw'ibikoresho birwanya ubushyuhe bukoreshejwe mu bigega binini by'icyuma bishongeshejwe n'ibivange by'icyuma, kandi bigahura n'ibihe bikomeye byo gushyuha no gukonjesha, bikunze kwangirika, bigatera gushwanyagurika kw'imiterere. Byongeye kandi, kubera ko amatafari ya Al2O3-SiC-C akoreshwa mu bigega binini by'icyuma bishyushye n'ibivange by'icyuma akenshi aba afite igipimo cya karuboni cya 15% n'ubushyuhe bugera kuri 17~21W/(m·K) (800℃), habaho kugabanuka k'ubushyuhe bw'icyuma gishongeshejwe n'ikibazo cyo kwangiza ibyuma by'ibigega binini by'icyuma bishongeshejwe n'imodoka zivangavanga. Ingamba zo guhangana ni ukugera ku bushyuhe buke binyuze mu gukuraho SiC, igice gitanga ubushyuhe bwinshi, mu gihe bigabanya igipimo cya grafiti no gutunganya grafiti.
Binyuze mu bushakashatsi bw'ibanze, byaje kugaragara ko:
(1) Iyo ingano ya grafiti (igice kinini) mu matafari ya aluminiyumu ari munsi ya 10%, imiterere yayo igizwe na Al2O3 ikora matrix ihoraho, kandi karuboni yuzura muri matrix mu buryo bw'inyenyeri. Muri iki gihe, ubwiyongere bw'ubushyuhe bwa λ bw'itafari rya aluminiyumu karuboni bushobora kubarwa hakurikijwe formula (1)
Muri formula, λa ni uburyo bwo gutwara ubushyuhe bwa Al2O3; Vc ni igice cy'ingano ya grafiti. Ibi bigaragaza ko uburyo bwo gutwara ubushyuhe bw'amatafari ya aluminiyumu karuboni ntaho buhuriye n'uburyo bwo gutwara ubushyuhe bwa grafiti.
(2) Iyo grafiti itunganyijwe, ubushobozi bwo gutwara ubushyuhe bw'itafari rya aluminiyumu karuboni ntibushingira cyane ku duce twa grafiti.
(3) Ku matafari ya aluminiyumu na karuboni nkeya, iyo grafiti itunganyijwe, hashobora gukorwa matrix ikomeye yo guhuza amatafari, ishobora kongera ubudahangarwa bw'ingese ku matafari ya aluminiyumu na karuboni.
Ibi bigaragaza ko amatafari ya aluminiyumu afite karuboni nkeya ashobora kwihuza n'imikorere y'ibigega binini by'icyuma gishyushye n'imodoka zivanga ibyuma mu buryo bwo gukora ibyuma.
?
Igihe cyo kohereza: 27 Gashyantare 2024
