Reaction sintering silicon carbide ke mokhoa oa bohlokoa oa ho hlahisa lisebelisoa tsa ceramic tse sebetsang hantle. Mokhoa ona o sebelisa mocheso oa mocheso oa mehloli ea carbon le silicon mocheso o phahameng ho etsa hore ba itšoare ka ho etsa li-ceramics tsa silicon carbide.
1. Tokisetso ea lisebelisoa tse tala. Lisebelisoa tse tala tsa karabelo-sintered silicon carbide li kenyelletsa mohloli oa khabone le mohloli oa silicon. Mohloli oa carbon hangata ke carbon black kapa polymer e nang le carbon, ha mohloli oa silicon e le silika e phofshoana. Lisebelisoa tsena tse tala li hloka ho siloa, ho hlahlojoa le ho kopanngoa ho netefatsa boholo ba likaroloana tse lekanang, ha li ntse li laola lik'hemik'hale tsa tsona e le hore li fumane li-ceramics tsa boleng bo phahameng ba silicon carbide nakong ea phekolo ea mocheso.
2. Sebopeho. Kenya lintho tse tala tse tsoakiloeng ka har'a hlobo ea ho bopa. Ho na le mefuta e mengata ea mekhoa ea ho bopa, eo hangata e sebelisoang ke mochini oa khatiso le oa ente. Tobetsa ho bopa ke ho hatelloa ha phofo ea thepa e tala tlas'a khatello hore e thehoe, ha ente e bopa e le thepa e tala e kopantsoeng le sekhomaretsi, e fafatsoa ka har'a hlobo ka seringe ho theha. Kamora ho theha, hoa hlokahala ho etsa kalafo ea demoulding ho tlosa billet ea ceramic ho hlobo.
3. Kalafo ea mocheso. 'Mele o entsoeng ka ceramic o kenngoa ka sebōping sa phekolo ea mocheso bakeng sa ho sintering. Ts'ebetso ea sintering e arotsoe ka mekhahlelo e 'meli: sethala sa carbonization le sethala sa sintering. Sethaleng sa carbonization, 'mele oa ceramic o futhumatsoa ho mocheso o phahameng (hangata o ka holimo ho 1600 ° C) tlas'a sepakapaka se sa sebetseng,' me mohloli oa carbon o arabela le mohloli oa silicon ho hlahisa silicon carbide. Sebakeng sa sintering, mocheso o phahamisetsoa ho mocheso o phahameng (hangata o ka holimo ho 1900 ° C), o bakang recrystallization le densification pakeng tsa likaroloana tsa silicon carbide. Ka tsela ena, boima ba 'mele oa silicon carbide bo ntlafatsoa le ho feta, athe ho thatafala le ho hanyetsa ho roala le hona ho ntlafatsoa haholo.
4. Ho qetela. 'Mele oa sintered ceramic o hloka ho phethoa ho fumana sebopeho le boholo bo lakatsehang. Mekhoa ea ho qetela e kenyelletsa ho sila, ho khaola, ho cheka, joalo-joalo Ka lebaka la boima bo feteletseng ba thepa ea silicon carbide, ho thata ho qeta, ho hloka hore ho sebelisoe lisebelisoa tse phahameng tsa ho sila le lisebelisoa tsa ho sebetsa.
Ka kakaretso, ts'ebetso ea tlhahiso ea reaction-sintered silicon carbide e kenyelletsa ho lokisoa ha lisebelisoa tse tala, ho bopa, kalafo ea mocheso le ho qeta. Har'a bona, mohato oa bohlokoa ke mokhoa oa ho phekola mocheso, oo taolo ea oona e leng ea bohlokoa ho fumana lisebelisoa tsa boleng bo phahameng ba silicon carbide. Hoa hlokahala ho laola mocheso, sepakapaka, nako ea ho tšoara le lintlha tse ling tsa phekolo ea mocheso ho etsa bonnete ba hore karabelo e lekane, crystallization e phethehile 'me boima bo phahame.
Monyetla oa ts'ebetso ea tlhahiso ea karabelo-sintered silicon carbide ke hore lisebelisoa tsa ceramic tse nang le boima bo phahameng, matla a phahameng, ho hanyetsa ho apara ho phahameng le botsitso ba mocheso o phahameng li ka lokisoa. Boitsebiso bona ha bo na thepa e ntle ea mochine feela, empa hape bo na le ts'ebetso e babatsehang ea ho hanyetsa kutu le thepa e phahameng ea mocheso. Lisebelisoa tsa silicon carbide li ka sebelisoa ho etsa likarolo tse fapaneng tsa boenjiniere, litiiso tsa mochini, lisebelisoa tsa kalafo ea mocheso, lirafshoa tsa sebōpi joalo-joalo. Ka nako e ts'oanang, lisebelisoa tsa silicon carbide li ka sebelisoa hape ho semiconductor, matla a letsatsi, lisebelisoa tsa makenete le masimo a mang.
Ka bokhutšoanyane, reaction sintering silicon carbide ke mokhoa oa bohlokoa oa ho lokisa lisebelisoa tse phahameng tsa ceramic. Ts'ebetso ea tlhahiso e hloka taolo e ntle ea sehokelo ka seng ho fumana lisebelisoa tsa boleng bo holimo tsa silicon carbide. Lisebelisoa tsa silicon carbide tsa Reaction-sintered li na le thepa e ntle haholo ea mochini, ho hanyetsa kutu le thepa ea mocheso o phahameng, 'me li na le tebello e pharalletseng ea ts'ebeliso makaleng a fapaneng a indasteri le mahlale.
Nako ea poso: Jul-21-2023