Porcelain ea silicon carbide e nang le karabelo e na le matla a matle a ho hatella mochesong o potolohileng, ho hanyetsa mocheso ho oxidation ea moea, ho hanyetsa ho tsofala hantle, ho hanyetsa mocheso hantle, ho fokotsa ho feteletseng ha ho otloloha ...
Ho sintering ntle le kgatello ho tsejwa e le mokgwa o tshepisang wa ho calcination wa SiC. Bakeng sa mechini e fapaneng ya ho lahla e tswelang pele, ho sintering ntle le kgatello ho ka arolwa ka ho ba calcination ya mokgahlelo o tiileng le calcination ya mokelikeli o sebetsang hantle. Ka ho eketsa B le C tse loketseng (dikahare tsa oksijene tse ka tlase ho 2%) hammoho ka phofo e ntle haholo ya Beta SiC, S. Proehazka e sintered ka hara mmele o nang le calcium wa SIC o nang le bongata bo fetang 98% ka 2020, ka Al2O3 le Y2O3 e le di-additives. Calcined 0.5m-SiC tlasa 1850-1950 (bokahodimo ba dikarolwana bo nang le SiO2 e nyane), qeto ke hore bongata ba porcelain ya SiC bo feta 95% ya bongata ba motheo ba thuto, boholo ba dijo-thollo bo bonyenyane, mme boholo bo mahareng bo boholo, e leng 1.5μm.
Carbide ea silicon e sintering e sebetsang hantle e bolela ts'ebetso eohle ea ho bonahatsa sebopeho sa billet se nang le masoba ka karolo ea mokelikeli kapa karolo ea mokelikeli e sebetsang hantle, ho ntlafatsa boleng ba billet, ho fokotsa lesoba la moea, le ho calcinera sehlahisoa se felileng ka matla a itseng le ho nepahala ho itseng. Phofo ea Plutonium-sic le graphite e hloekileng haholo li kopantsoe ka tekanyo e itseng 'me li futhumatsoa ho fihlela hoo e ka bang 1650 ho hlahisa lesea la moriri. Ka nako e ts'oanang, e kenella kapa e kenella ka har'a tšepe ka karolo ea mokelikeli ea Si, e bonahatsa ka silicon carbide ho etsa plutonium-sic, 'me e kopana le likaroloana tse teng tsa plutonium-sic. Kamora ho kenella ha Si, 'mele o sintered reaction o nang le botebo bo qaqileng bo amanang le boholo le boholo bo sa pakoang o ka fumanoa. Ha ho bapisoa le mekhoa e meng ea sintering, ts'ebetsong ea karabelo e phahameng ea sintering reaction boholo bo fetoha hanyane, bo ka hlahisa boholo bo nepahetseng ba thepa, empa ho na le SiC e ngata 'meleng o sintered, litšobotsi tsa mocheso o phahameng oa SiC porcelain ea reaction e sintered li tla mpefala. Liserami tsa SiC tse se nang khatello tse nang le calcium, liserami tsa SiC tse chesang tse nang le calcium e ngata tse chesang le liserami tsa SiC tse nang le reaction sintered li na le litšobotsi tse fapaneng.
Bahlahisi ba dikhabodi tsa silicon tse etsang active sintering: Mohlala, porcelain ya SiC boemong ba calcined relative density le kobeha, hot pressing sintering le hot isostatic pressing calcination di ngata, mme reactive sintering SiC e tlase haholo. Ka nako e ts'oanang, thepa ya mmele ya porcelain ya SiC e fetoha ka phetoho ya calcination modifier. Sintering e seng ya kgatello, hot pressing sintering le reaction sintering ya SiC porcelain e na le kganyetso e ntle ya alkaline le kganyetso ya asiti, empa SiC porcelain e etsang active sintering e na le kganyetso e fokolang ho HF le mafome a mang a matla haholo a asiti. Ha mocheso o le ka tlase ho 900, matla a kobeha a boholo ba porcelain ya SiC a phahame haholo ho feta a porcelain e etsang temperature sintered, mme matla a kobeha a SiC porcelain e etsang active sintered a theoha haholo ha a feta 1400. (Sena se bakwa ke ho theoha ka tshohanyetso ha matla a kobeha a tekanyo e itseng ya khalase e laminated Si ho feta mocheso o itseng mmeleng o entsweng calcined. Tshebetso e phahameng ya mocheso wa di-ceramic tsa SiC tse entsweng ntle le kganyetso ya calcination le tlasa kganyetso e tsitsitseng e chesang e angwa haholo ke mefuta ya di-additives.
Nako ea poso: Pulungoana-07-2023