Reaction-sintered silicon carbide ke mofuta o mocha oa li-ceramics tsa theknoloji e phahameng, tse nang le matla a phahameng, boima bo phahameng, ho hanyetsa ho apara hantle le ho hanyetsa ho bola, 'me e sebelisoa haholo ho metallurgy, petrochemicals, electronics, aerospace le masimo a mang. Sehlahisoa se nang le silicon carbide abrasive axiliary carbon black, graphite le li-additives tse fapa-fapaneng, li sebelisa mokhoa o omileng oa khatiso, extrusion kapa ho tšela ho etsa boleng ba porous, joale tse latelang hammoho ho utloisisa mokhoa oa tlhahiso ea reactive sintering silicon carbide!
Reactive sintering silicon carbide Ho qaptjoa ke leano la tekheniki le batlang le hōlile ka mor'a liteko tse likete tse entsoeng ke moqapi ka lilemo tse ngata ho ntšetsa pele mokhoa oa lihlahisoa tse tala le ts'ebetso ea tlhahiso, haholo-holo mokhoa o ikhethang o tsoelang pele oa sintering.
Ka kopo ea 1 ea ho qaptjoa, karolo ea boima ba silicon carbide phofo ke likarolo tse 5 ~ 8, carbon black ke likarolo tse 0.5-1.5, graphite ke likarolo tse 1-1.5, 'me binder ke likarolo tse 0.1-0.5. Har'a tsona, boholo ba lijo-thollo tsa silicon carbide ke likarolo tsa sic (90-30m) 3-5, sic) 30-0.8m) likarolo tse 2-3. methyl cellulose le phofo ea PVA ea litšephe li ne li kenngoa ka har'a metsi a lekaneng 0.1-0.5 likarolo ka ho latellana, 'me tharollo e hlakileng e ile ea fumanoa ka mor'a ho futhumatsa.
1. Kopanya mefuta eohle ea li-powders, li-adhesives le litharollo tse lokiselitsoeng ho ea ka foromo ebe u hlohlelletsa hantle.
2, hloekisa vacuum ea hlobo, fihla 0.1Mpa, ente ea khatello ea slurry e tsoakiloeng. Ka mor'a nako e itseng, slurry e lokolloa 'me sekoti se ntšoa. Boloka ho 30-70 bakeng sa lihora tse 18-20 bakeng sa ho omisa.
3. Fokotsa billet ho ea ka litlhoko tsa setšoantšo.
4, kenya reaction sintering billet ka seboping, eketsa boima ba likarolo tse 1-3 tsa silicon ea tšepe, vacuum sintering. Ts'ebetso e arotsoe ka mocheso o tlase oa 0-700, o bolokiloe lihora tse 3-5; Mocheso o mahareng 700-1400, boloka lihora tse 4-6; Boloka mocheso o phahameng oa 1400-2200 bakeng sa lihora tse 5-7. Tlosa mocheso o ka tlase ho 150 emisa sebōpi 'me u bule sebōpi.
5, lehlabathe blasting kalafo sila sehlahiswa holim 'a silicon slag, le lehlabathe blasting sila.
6, lihlahisoa tsa kalafo ea oxidation ka seboping sa oxidation, lihora tse 24 ho isa ho 1350, pholiso ea tlhaho. Ntša, hlahloba 'me u behe polokelong.
Lisebelisoa tse tala le karolo e amohetsoeng ke mokhoa oa ho qaptjoa ke saense le e utloahalang, e le hore sekheo se be le sekheo se lekaneng 'me se se nang letho se be le sekhahla se molemo; Sekhahla se betere sa ho futhumatsa sintering, mocheso le nako ea ho ts'oara li netefatsa matla a holimo a ho kobeha ha sehlahisoa. Ts'ebetso e kholo le boleng ba mokhoa ona li fihlile boemong bo phahameng ba machaba. Lipontšo tsa eona tse ka sehloohong ke tse latelang
Reaction sintering silicon carbide ts'ebetsong e khethehileng
Embodiment 1 Mokhoa oa ho etsa li-bundle tsa karabelo-sintered silicon carbide:
1, lisebelisoa tse tala ho nka boima ba sekhomaretsi ba likarolo tse 0,3, eketsa palo e itseng ea metsi ka mokhoa o ts'oanang, boima ba likarolo tse 6.8 tsa silicon carbide powder (karolo ea boholo ba 90-30m ea likarolo tse 3.8, 30-0.8m ea likarolo tse 3) , carbon black 1 part, e ntšo
2. Ha u tšela, qala ka ho hloekisa hlobo e sebelisitsoeng, kopanya hlobo, e lokise ka li-fasteners, hula slurry ho tsoa ka tanka ka khatello, tlatsa tanka ka 0.1Mpa khatello ea nitrogen, etsa khatello ea ho tšela, 'me u sutumelle slurry ka har'a hlobo. . Ka mor'a ho fihla hora ea 1, slurry e lokolloa, 'me ka mor'a lihora tse 6, hlobo e tlosoa, thepa e se nang letho e ntšoa,' me kamore ea ho omisa e omisitsoe. 30-70, 18-20 lihora tse ho tlosa. 3. Ha u lokisa sekheo, qala ka ho hlahloba hore na sekheo se kopana le litlhoko tsa moralo. Ha u kopana le litlhoko, lokisa sekheo ho latela setšoantšo. Ka mor'a ho hlahloba, romela kamoreng ea ho omisa mocheso o phahameng.
4. Ka mor'a hore mongobo oa reaction sintering billet o fihle ho 1%, o ntše, o hloekise billet ka moea o fokang 'me ue lekanye. Kenya likarolo tse 2,9 tsa tšepe ea silicon. Nitrojene e ka pompeloa ka har'a vacuum sintering. Sintering tshebetso ka mocheso o tlase oa 700 bakeng sa lihora tse 4; Mocheso o mahareng 1400, lihora tse 5; Mocheso o phahameng oa lihora tse 2200,6. Ha mocheso o theoha lihora tse 12 mme o fihla ho 150, emisa ts'ebetso ka sebōping ebe o bula sebōpi.
5. Ka mor'a hore sehlahisoa sa phekolo ea lehlabathe se tsoe, silicon standard Chartered holim'a eona e fatše 'me e siloa ka sandblasting.
6. Sepheo sa lihlahisoa tsa phekolo ea oxidation ke ho tlosa li-oxide tse hlahisoang nakong ea sintering. Sehlahisoa se futhumatsoa ho 1350 bakeng sa lihora tse 24 ka sebōping sa oxidation ebe se pholile ka tlhaho. Ka mor'a hore e tlosoe, e kenngoa polokelong ka ho hlahlojoa.
Lisebelisoa tse tala le karolo e amohetsoeng ke mokhoa oa ho qaptjoa ke saense le e utloahalang, e le hore sekheo se be le sekheo se lekaneng 'me se se nang letho se be le sekhahla se molemo; Sekhahla se betere sa ho futhumatsa sintering, mocheso le nako ea ho ts'oara li netefatsa matla a holimo a ho kobeha ha sehlahisoa. Ts'ebetso e kholo le boleng ba lihlahisoa tse hlahisoang ke mokhoa ona li fihlile boemong bo phahameng ba machaba.
E ka holimo ke mokhoa oa tlhahiso ea reactive sintering silicon carbide, haeba u hloka boitsebiso bo eketsehileng, ka kōpo ikutloe u lokolohile ho ikopanya le rona!
Nako ea poso: Jun-13-2023