Reaction-sintered silicon carbide ke thepa ea bohlokoa ea mocheso o phahameng, e nang le matla a phahameng, boima bo phahameng, khanyetso e phahameng ea ho roala, ho hanyetsa kutu le ho hanyetsa oxidation e phahameng le thepa e meng e metle, e sebelisoa haholo mecheng, sefofaneng, indastering ea lik'hemik'hale, matla le tse ling. masimo.
1. Ho lokisetsa thepa e tala
Ho lokisoa ha lisebelisoa tse tala tsa sintering silicon carbide haholo-holo ke phofo ea carbon le silicon, eo k'habone e ka sebelisoang ka mefuta e fapaneng ea lintho tse nang le carbon, joalo ka coke ea mashala, graphite, mashala, joalo-joalo, phofo ea silicon hangata e khethoa ka karoloana. boholo ba 1-5μm bohloeki bo phahameng ba silicon phofo. Ntlha ea pele, phofo ea carbon le silicon e tsoakoa ka tekanyo e itseng, ho eketsa tekanyo e loketseng ea setlama le ho phalla, le ho hlohlelletsa ka ho lekana. Motsoako ebe o kenngoa ka har'a leloala la bolo bakeng sa ho sila bolo ho tsoela pele ho kopanya junifomo le ho sila ho fihlela boholo ba karoloana bo ka tlase ho 1μm.
2. Mokhoa oa ho bōpa
Mokhoa oa ho bopa ke o mong oa mehato ea bohlokoa tlhahisong ea silicon carbide. Mekhoa ea ho bopa e sebelisoang ka tloaelo ke ho bopa ka ho hatella, ho bopa ha grouting le ho bopa ho sa fetoheng. Ho etsa khatiso ho bolela hore motsoako o kenngoa ka har'a hlobo 'me o thehoa ke khatello ea mochine. Ho bopa ha grouting ho bolela ho kopanya motsoako le metsi kapa motsoako oa motsoako, ho o kenya ka har'a hlobo ka sering tlas'a maemo a vacuum, le ho etsa sehlahisoa se felileng ka mor'a hore se eme. Ho bopa ha khatello e tsitsitseng ho bolela motsoako ka har'a hlobo, tlas'a tšireletso ea vacuum kapa sepakapaka bakeng sa ho bopa ha khatello e tsitsitseng, hangata ka khatello ea 20-30MPa.
3. Sintering tshebetso
Sintering ke mohato oa bohlokoa ts'ebetsong ea tlhahiso ea karabelo-sintered silicon carbide. Mocheso oa sintering, nako ea sintering, sepakapaka sa sintering le lintlha tse ling li tla ama ts'ebetso ea karabelo-sintered silicon carbide. Ka kakaretso, mocheso oa sintering oa reactive sintering silicon carbide o pakeng tsa 2000-2400 ℃, nako ea sintering hangata ke lihora tse 1-3, 'me sepakapaka sa sintering hangata se na le inert, joalo ka argon, nitrogen, joalo-joalo. Nakong ea sintering, motsoako o tla ba le karabelo ea lik'hemik'hale ho etsa likristale tsa silicon carbide. Ka nako e ts'oanang, carbon e tla boela e sebetsane le likhase tse sepakapakeng ho hlahisa likhase tse kang CO le CO2, tse tla ama boima le thepa ea silicon carbide. Ka hona, ho boloka sepakapaka se loketseng sa sintering le nako ea sintering ho bohlokoa haholo bakeng sa ho etsa reaction-sintered silicon carbide.
4. Ts'ebetso ea ka mor'a phekolo
Reaction-sintered silicon carbide e hloka ts'ebetso ea kamora kalafo kamora tlhahiso. Mekhoa e tloaelehileng ea ka mor'a ho phekoloa ke machining, ho sila, ho bentša, oxidation joalo-joalo. Mekhoa ena e etselitsoe ho ntlafatsa boleng bo nepahetseng le bo holimo ba silicon carbide e arabelang. Har'a bona, mokhoa oa ho sila le oa ho belisa ke mokhoa o tloaelehileng oa ho sebetsa, o ka ntlafatsang qetello le ho bata ha silicon carbide holim'a metsi. Ts'ebetso ea oxidation e ka theha lera la oxide ho matlafatsa khanyetso ea oxidation le botsitso ba lik'hemik'hale tsa karabelo-sintered silicon carbide.
Ka bokhuts'oane, tlhahiso ea sintering silicon carbide ke ts'ebetso e rarahaneng, e hlokang ho tseba mefuta e fapaneng ea mahlale le lits'ebetso, ho kenyeletsoa ho lokisoa ha thepa e tala, mokhoa oa ho bopa, ts'ebetso ea sintering le ts'ebetso ea kamora kalafo. Ke feela ka ho tseba ka botlalo mahlale le lits'ebetso tsena moo lisebelisoa tsa boleng bo holimo tsa silicon carbide li ka hlahisoang ho fihlela litlhoko tsa likarolo tse fapaneng tsa kopo.
Nako ea poso: Jul-06-2023