Lekholong la bo21 la lilemo, ka nts'etsopele ea saense le theknoloji, tlhahisoleseling, matla, thepa, boenjiniere ba baeloji e fetohile litšiea tse 'ne tsa nts'etsopele ea tlhahiso ea sechaba ea kajeno, silicon carbide ka lebaka la thepa e tsitsitseng ea lik'hemik'hale, conductivity e phahameng ea mocheso, coefficient ea katoloso ea mocheso ea bonyane, bongata bo bonyenyane, khanyetso e ntle ea ho roala, thatafalo e phahameng, matla a phahameng a mechini, khanyetso ea ts'enyeho ea lik'hemik'hale le litšobotsi tse ling, nts'etsopele e potlakileng tšimong ea thepa, E sebelisoa haholo ho li-bearing tsa bolo ea ceramic, li-valve, thepa ea semiconductor, gyro, sesebelisoa sa ho lekanya, sefofane le masimo a mang.
Li-ceramic tsa silicon carbide li 'nile tsa ntlafatsoa ho tloha lilemong tsa bo-1960. Pele ho moo, silicon carbide e ne e sebelisoa haholo-holo lisebelisoa tsa ho sila tsa mechine le li-refractories. Linaha lefatšeng ka bophara li nka bohlokoa bo boholo indastering ea li-ceramic tse tsoetseng pele, 'me joale ha li khotsofalle feela ho lokisoa ha li-ceramic tsa silicon carbide tsa setso, tlhahiso ea likhoebo tsa li-ceramic tsa theknoloji e phahameng e ntse e hola ka potlako, haholo-holo linaheng tse tsoetseng pele. Lilemong tsa morao tjena, li-ceramic tsa mekhahlelo e mengata tse thehiloeng ho li-ceramic tsa SIC li hlahile ka mor'a tse ling, li ntlafatsa matla le matla a thepa ea monomer. Silicon carbide masimo a mane a ka sehloohong a ts'ebeliso, ke hore, li-ceramic tse sebetsang, thepa e tsoetseng pele ea refractory, li-abrasives le thepa e tala ea tšepe.
Li-ceramic tsa silicon carbide li na le khanyetso e ntle ea ho roala
Sesepa sa silicon carbide sehlahisoa sena se ithutiloe 'me sa fumanoa. Khanyetso ea ho tsofala ha lisepa tsa silicon carbide sehlahisoa sena se lekana le tšepe ea manganese ka makhetlo a 266, e lekanang le tšepe e phahameng ea chromium ka makhetlo a 1741. Khanyetso ea ho tsofala e ntle haholo. E ntse e ka re bolokela chelete e ngata. Lisepa tsa silicon carbide li ka sebelisoa khafetsa ka lilemo tse fetang leshome.
Li-ceramic tsa silicon carbide li na le matla a phahameng, boima bo phahameng le boima bo bobebe
Jwalo ka mofuta o motjha wa thepa, tshebediso ya diseramiki tsa silicon carbide matla a sehlahiswa sena a phahame haholo, boima bo phahameng, boima le bona bo bobebe haholo, diseramiki tse jwalo tsa silicon carbide tse sebediswang, tse kentsweng le tse nkelwang sebaka ke tse ka hodimo di tla ba bonolo haholoanyane.
Lebota le ka hare la silicon carbide ceramic le boreleli ebile ha le thibele phofo
Li-ceramic tsa silicon carbide sehlahisoa sena se chesoa ka mor'a mocheso o phahameng, kahoo sebopeho sa li-ceramic tsa silicon carbide se teteaneng haholo, bokaholimo bo boreleli, botle ba tšebeliso bo tla ba botle haholoanyane, kahoo bo tla sebelisoa ka lapeng, botle bo tla ba botle haholoanyane.
Litšenyehelo tsa li-ceramic tsa silicon carbide li tlase
Litšenyehelo tsa ho etsa liserami tsa silicon carbide ka botsona li tlase haholo, kahoo ha ho hlokahale hore re reke theko ea liserami tsa silicon carbide e theko e boima haholo, kahoo bakeng sa malapa a rona, empa hape e ka boloka chelete e ngata.
Tšebeliso ea ceramic ea silicon carbide:
Bolo ea ceramic ea silicon carbide
Bolo ea ceramic ea silicon carbide e na le thepa e ntle ea mechini, e hanyetsang oxidation hantle, e hanyetsa ho hoholo ha ho ruruha le coefficient e tlase ea khohlano. Bolo ea ceramic ea silicon carbide e matla a mocheso o phahameng, thepa e tloaelehileng ea ceramic e matla a 1200 ~ 1400 degrees Celsius e tla fokotseha haholo, 'me silicon carbide e matla a ho kobeha a 1400 degrees Celsius e ntse e bolokoa boemong bo phahameng ba 500 ~ 600MPa, kahoo mocheso oa eona oa ho sebetsa o ka fihla ho 1600 ~ 1700 degrees Celsius.
Thepa e kopaneng ea silicon carbide
Metswako ya matrix ya silicon carbide (SiC-CMC) e sebedisitsoe haholo lefapheng la difofane bakeng sa meaho ya tsona ya mocheso o phahameng ka lebaka la ho tiya ha tsona haholo, matla a tsona a hodimo le ho hanyetsana ho hoholo ha oxidation. Tshebetso ya ho lokisa SiC-CMC e kenyeletsa ho lokisa faeba pele, kalafo ya mocheso o phahameng, ho kwahela mesophase, ho tsitsisa matrix le kalafo ya kamora kalafo. Faeba ya carbon e matla a hodimo e na le matla a hodimo le ho tiya ho hoholo, mme mmele o entsweng ka yona o na le thepa e ntle ya mechine.
Ho koahela ka mesophase (ke hore, theknoloji ea sebopeho) ke theknoloji ea bohlokoa ts'ebetsong ea ho lokisa, ho lokisoa ha mekhoa ea ho koahela ka mesophase ho kenyelletsa chemical vapor osmosis (CVI), chemical vapor deposition (CVD), mokhoa oa sol-sol (Sol-gcl), mokhoa oa ho petsoha ha polymer impregnation (PLP), o loketseng ka ho fetisisa bakeng sa ho lokisa metsoako ea silicon carbide matrix ke mokhoa oa CVI le mokhoa oa PIP.
Lisebelisoa tsa ho koahela tse nang le li-interfacial li kenyelletsa carbon ea pyrolytic, boron nitride le boron carbide, tseo har'a tsona boron carbide e le mofuta oa khanyetso ea oxidation, khanyetso ea interfacial e 'nileng ea eloa hloko haholoanyane. SiC-CMC, eo hangata e sebelisoang maemong a oxidation ka nako e telele, le eona e hloka ho feta kalafong ea khanyetso ea oxidation, ke hore, lera la silicon carbide e teteaneng e nang le botenya ba hoo e ka bang 100μm le beoa holim'a sehlahisoa ka ts'ebetso ea CVD ho ntlafatsa khanyetso ea eona ea oxidation ea mocheso o phahameng.
Nako ea poso: Hlakola-14-2023