Lekholong la bo21 la lilemo, ka tsoelo-pele ea saense le thekenoloji, tlhahisoleseding, matla, thepa, boenjiniere ba likokoana-hloko e fetohile litšiea tse 'nè tsa tsoelo-pele ea tlhahiso ea sechaba ea kajeno, silicon carbide ka lebaka la thepa e tsitsitseng ea lik'hemik'hale, conductivity e phahameng ea mocheso, mocheso oa ho atolosa coefficient. tse nyenyane, tse nyenyane density, e ntle ea ho apara ho hanyetsa, boima bo phahameng, matla a phahameng a mochine, lik'hemik'hale tse hanyetsanang le ho bola ha lik'hemik'hale le litšobotsi tse ling, tsoelo-pele e potlakileng tšimong ea thepa, E sebelisoa haholo ka li-bearings tsa ceramic bolo, li-valve, lisebelisoa tsa semiconductor, gyro, sesebelisoa sa ho lekanya, sefofane le masimo a mang.
Li-ceramics tsa silicon carbide li 'nile tsa ntlafatsoa ho tloha ka bo-1960. Pejana, silicon carbide e ne e sebelisoa haholo linthong tsa ho sila tsa mochini le li-refractories. Linaha lefats'eng lohle li nka bohlokoa bo boholo ho nts'etsopele ea li-ceramics tse tsoetseng pele, 'me hona joale ha e khotsofatsoe feela ke ho lokisoa ha li-ceramics tsa setso tsa silicon carbide, tlhahiso ea lik'hamphani tsa theknoloji e phahameng tsa ceramic li hōla ka potlako, haholo-holo linaheng tse tsoetseng pele. Lilemong tsa morao tjena, li-ceramics tsa mekhahlelo e mengata tse thehiloeng ho li-ceramics tsa SIC li hlahile ka mor'a tse ling, li ntlafatsa ho tiea le matla a thepa ea monomer. Silicon carbide likarolo tse 'ne tsa ts'ebeliso, ke hore, lirafshoa tse sebetsang, lisebelisoa tse tsoetseng pele tsa refractory, li-abrasives le lisebelisoa tse tala tsa metallurgic.
Li-ceramics tsa silicon carbide li na le khanyetso e ntle ea ho apara
Silicon carbide ceramics sehlahisoa sena se ithutile le ho khethoa. Ho hanyetsa ha silicon carbide ceramics sehlahisoa sena se lekana le makhetlo a 266 a tšepe ea manganese, e lekanang le makhetlo a 1741 a tšepe e phahameng ea chromium. Ho hanyetsa ho apara ho molemo haholo. E ntse e ka re bolokela chelete e ngata. Silicon carbide ceramics e ka sebelisoa khafetsa ka lilemo tse fetang leshome.
Li-ceramics tsa silicon carbide li na le matla a phahameng, boima bo phahameng le boima bo bobebe
E le mofuta o mocha oa thepa, tšebeliso ea silicon carbide ceramics matla a sehlahisoa sena a phahame haholo, boima bo phahameng, boima bo boetse bo bobebe haholo, li-ceramics tse joalo tsa silicon carbide tse sebelisoang, ho kenya le ho nkela sebaka se ka holimo ho tla ba bonolo haholoanyane.
Lerako le ka hare la silicon carbide ceramic le boreleli ebile ha le thibele phofo
Silicon carbide ceramics sehlahisoa sena se chesoa ka mor'a mocheso o phahameng, kahoo sebopeho sa li-ceramics tsa silicon carbide se batla se le boima, bokaholimo bo boreleli, botle ba tšebeliso bo tla ba bo botle haholoanyane, bo sebelisoang ka lapeng, botle bo tla ba bo botle haholoanyane.
Litsenyehelo tsa silicon carbide ceramics li tlase
Litsenyehelo tsa ho etsa li-ceramics tsa silicon carbide ka boeona li batla li le tlase, kahoo ha ho hlokahale hore re reke theko ea silicon carbide ceramics e bitsa chelete e ngata haholo, kahoo bakeng sa malapa a rona, empa hape e ka boloka chelete e ngata.
Tšebeliso ea silicon carbide ceramic:
Silicon carbide ceramic bolo
Silicon carbide ceramic ball e na le thepa e ntle haholo ea mochini, khanyetso e ntle ea oxidation, khanyetso e phahameng ea abrasion le coefficient e tlase ea likhohlano. Silicon carbide ceramic ball matla a mocheso o phahameng oa mocheso, lisebelisoa tse tloaelehileng tsa ceramic ho 1200 ~ 1400 likhato tsa Celsius matla a tla fokotseha haholo, 'me silicon carbide ka 1400 degrees Celsius matla a ho khumama a ntse a bolokiloe boemong bo phahameng ba 500 ~ 600MPa, kahoo mocheso oa eona o sebetsang o ka fihla. 1600 ~ 1700 likhato tsa Celsius.
Silicon carbide thepa e kopantsoeng
Silicon carbide matrix composite (SiC-CMC) e 'nile ea sebelisoa haholo sebakeng sa sefofane bakeng sa mehaho ea bona ea mocheso o phahameng oa mocheso ka lebaka la ho thatafala ha bona, matla a phahameng le khanyetso e ntle ea oxidation. Mokhoa oa ho lokisa oa SiC-CMC o kenyelletsa fiber preforming, kalafo ea mocheso o phahameng, ho roala mesophase, matrix densification le ka mor'a kalafo. Matla a phahameng a carbon fiber a na le matla a phahameng le ho tiea ho hotle, 'me' mele o entsoeng esale pele o entsoeng ka oona o na le thepa e ntle ea mochine.
Ho roala ha Mesophase (ke hore, theknoloji ea segokanyimmediamentsi sa sebolokigolo) ke thekenoloji ea bohlokoa ts'ebetsong ea ho lokisa, ho lokisoa ha mekhoa ea ho roala mesophase ho kenyelletsa lik'hemik'hale tsa mouoane osmosis (CVI), lik'hemik'hale tsa mouoane oa lik'hemik'hale (CVD), mokhoa oa sol-sol (Sol-gcl), polymer. impregnation cracking method (PLP), e loketseng ka ho fetisisa bakeng sa ho lokisoa ha silicon carbide matrix composite ke mokhoa oa CVI le mokhoa oa PIP.
Lisebelisoa tsa ho roala ka sefahleho li kenyelletsa pyrolytic carbon, boron nitride le boron carbide, eo har'a eona boron carbide e le mofuta oa ho hanyetsa oxidation interfacial coating e lebisitsoeng tlhokomelo e eketsehileng. SiC-CMC, eo hangata e sebelisoang maemong a oxidation ka nako e telele, e boetse e hloka ho fumana kalafo ea ho hanyetsa oxidation, ke hore, moalo oa silicon carbide e botenya e ka bang 100μm e behiloe holim'a sehlahisoa ka ts'ebetso ea CVD. ho ntlafatsa khanyetso ea eona ea mocheso o phahameng oa oxidation.
Nako ea poso: Feb-14-2023