Silicon carbide (SiC) ceramicsli fetohile lisebelisoa tsa mantlha tšimong ea lirafshoa tse nang le mocheso o phahameng oa mocheso ka lebaka la coefficient ea tsona e tlaase ea ho atolosa mocheso, conductivity e phahameng ea mocheso, boima bo phahameng, le botsitso bo botle ba mocheso le lik'hemik'hale. Li sebelisoa haholo mafapheng a bohlokoa a kang sefofane, matla a nyutlelie, sesole le li-semiconductors.
Leha ho le joalo, litlamo tse matla haholo tsa covalent le coefficient e tlase ea phallo ea SiC e etsa hore ho be thata ho tiisa. Ho fihlela sena, indasteri e ntlafalitse mahlale a fapaneng a sintering, 'me li-ceramics tsa SiC tse lokiselitsoeng ke mahlale a fapaneng li na le phapang e kholo ho sebopeho sa microstructure, thepa le maemo a ts'ebeliso. Mona ke tlhahlobo ea litšobotsi tsa mantlha tsa lirafshoa tse hlano tse kholo tsa silicon carbide.
1. Li-ceramics tsa SiC tse sa chesitsoeng ka thata (S-SiC)
Melemo ea mantlha: E loketse mekhoa e mengata ea ho bopa, theko e tlase, e sa lekanngoeng ke sebopeho le boholo, ke mokhoa o bonolo ka ho fetisisa oa sintering ho fihlela tlhahiso ea bongata. Ka ho eketsa boron le carbon ho β - SiC e nang le tekanyo ea oksijene le ho e tšela tlas'a sepakapaka se sa sebetseng se ka bang 2000 ℃, 'mele o sintered o nang le tekano ea 98% e ka fumanoa. Ho na le mekhoa e 'meli: mohato o tiileng le mohato oa metsi. Ea pele e na le boima bo phahameng le bohloeki, hammoho le conductivity e phahameng ea mocheso le matla a phahameng a mocheso.
Lisebelisoa tse tloaelehileng: Ho hlahisoa ka bongata ha mehele e tiisitsoeng e sa senyeheng le e sa jeng le li-bearings tse thellang; Ka lebaka la boima ba eona bo phahameng, matla a khoheli a tlase, le ts'ebetso e ntle ea bolo ea maoto, e sebelisoa haholo joalo ka lihlomo tse thibelang likulo bakeng sa likoloi le likepe, hammoho le ho sireletsa litšiea tsa sechaba le likoloi tsa lipalangoang tsa chelete. Ho hanyetsa ha eona ka makhetlo a mangata ho phahametse li-ceramics tse tloaelehileng tsa SiC, 'me ntlha ea ho robeha ea lihlomo tse sireletsang tse bobebe tsa silinda e ka fihla ho lithane tse fetang 65.
2. Li-ceramics tse entsoeng ka sintered SiC (RB SiC)
Melemo ea mantlha: Ts'ebetso e ntle ea mochini, matla a phahameng, ho hanyetsa kutu, le khanyetso ea oxidation; Mocheso o tlase oa sintering le litšenyehelo, tse khonang ho theha haufi le boholo ba nete. Mokhoa ona o kenyelletsa ho kopanya mohloli oa carbon le SiC phofo ho hlahisa billet. Ka mocheso o phahameng, silicon e qhibilihisitsoeng e kenella ka har'a billet 'me e itšoara ka carbon ho theha β - SiC, e kopanyang le ea pele α - SiC le ho tlatsa li-pores. Phetoho ea boholo nakong ea sintering e nyane, e etsa hore e tšoanelehe bakeng sa tlhahiso ea indasteri ea lihlahisoa tse bōpehileng tse rarahaneng.
Lisebelisoa tse tloaelehileng: Thepa ea sebōpi sa mocheso o phahameng, li-tubes tse khanyang, lisebelisoa tsa mocheso, li-nozzles tsa desulfurization; Ka lebaka la coefficient ea eona e tlase ea katoloso ea mocheso, modulus e phahameng ea elastic, le litšobotsi tse haufi tsa ho etsa marang-rang, e fetohile thepa e loketseng bakeng sa li-reflectors tsa sebaka; E ka boela ea nkela khalase ea quartz sebaka e le sesebelisoa se tšehetsang li-tubes tsa elektroniki le lisebelisoa tsa tlhahiso ea li-semiconductor chip.
3. Lirafshoa tsa SiC tse sintered tse chesang (HP SiC)
Molemo oa mantlha: Synchronous sintering tlas'a mocheso o phahameng le khatello e phahameng, phofo e boemong ba thermoplastic, e leng se loketseng mokhoa oa ho fetisa boima. E ka hlahisa lihlahisoa tse nang le lijo-thollo tse ntle, boima bo phahameng, le thepa e ntle ea mochine ka mocheso o tlaase le ka nako e khutšoanyane, 'me e ka finyella boima bo feletseng le haufi le boemo bo hloekileng ba sintering.
Tšebeliso e tloaelehileng: Qalong e ne e sebelisoa e le liphahlo tse thibelang likulo bakeng sa litho tsa basebetsi ba helikopthara ea US nakong ea Ntoa ea Vietnam, 'maraka oa lihlomo o ile oa nkeloa sebaka ke boron carbide e hatelitsoeng; Hajoale, e sebelisoa haholo maemong a holimo a tlatsetso, joalo ka masimo a nang le litlhoko tse phahameng haholo bakeng sa taolo ea sebopeho, bohloeki, le ho teteana, hammoho le mafapha a sa senyeheng le a indasteri ea nyutlelie.
4. Li-ceramics tse nchafalitsoeng tsa SiC (R-SiC)
Monyetla oa mantlha: Ha ho na tlhoko ea ho kenyelletsa lithuso tsa sintering, ke mokhoa o tloaelehileng oa ho lokisa bohloeki bo phahameng haholo le lisebelisoa tse kholo tsa SiC. Ts'ebetso ena e kenyelletsa ho kopanya li-powders tse mahoashe le tse ntle tsa SiC ka tekanyo le ho li etsa, ho li tšela sebakeng se sa sebetseng ho 2200 ~ 2450 ℃. Likaroloana tse ntle li fetoha mouoane ebe lia hoama ha li kopana pakeng tsa likaroloana tse mahoashe ho etsa lirafshoa, tse nang le bothata ba bobeli feela ho taemane. SiC e boloka matla a mocheso o phahameng, ho hanyetsa kutu, ho hanyetsa oxidation, le ho hanyetsa mocheso oa mocheso.
Lisebelisoa tse tloaelehileng: Thepa ea sebōpi ea mocheso o phahameng, lisebelisoa tsa mocheso, li-nozzles tse tukang; Lefapheng la sefofane le sesole, e sebelisoa ho etsa likarolo tsa sebopeho sa sepakapaka joalo ka lienjine, mapheoana a mohatla le fuselage, tse ka ntlafatsang ts'ebetso ea lisebelisoa le bophelo ba ts'ebeletso.
5. Silicon e kentse lirafshoa tsa SiC (SiSiC)
Melemo ea mantlha: Ka ho fetisisa loketseng bakeng sa tlhahiso ea indasteri, ka nako e khutšoanyane sintering, mocheso tlaase, le letso-letso ka ho feletseng le bao e seng holofala, entsoe ka SiC matrix le infiltrated Si mohato, arotsoe ka dithulaganyo tse peli: ho kenella ka metsi le khase ho kena. Ea ho qetela e na le litšenyehelo tse phahameng empa boima bo betere le ho tšoana ha silicon ea mahala.
Lisebelisoa tse tloaelehileng: porosity e tlaase, moea o motle, le ho hanyetsa ho fokolang ho thusa ho felisa motlakase o tsitsitseng, o loketseng ho hlahisa likarolo tse kholo, tse rarahaneng kapa tse se nang letho, tse sebelisoang haholo ka thepa ea ho sebetsana le semiconductor; Ka lebaka la modulus ea eona e phahameng, e bobebe, e na le matla a phahameng, le ho se kenelle moea ka mokhoa o babatsehang, ke thepa e ratoang e sebetsang hantle sebakeng sa lifofane, e khonang ho mamella meroalo libakeng tsa sebaka le ho netefatsa lisebelisoa tse nepahetseng le polokeho.
Nako ea poso: Sep-02-2025