Silicon carbide ceramicmolding process papiso: mokgoa wa sintering le melemo le bofokodi ba ona
Ha ho etsoa li-ceramics tsa silicon carbide, ho theha ke sehokelo se le seng feela ts'ebetsong eohle. Sintering ke ts'ebetso ea mantlha e amang ka kotloloho ts'ebetso ea ho qetela le ts'ebetso ea lirafshoa. Ho na le mekhoa e mengata e fapaneng ea ho kenya lirafshoa tsa silicon carbide, e 'ngoe le e' ngoe e na le melemo le melemo ea eona. Ka poso ena ea blog, re tla hlahloba ts'ebetso ea sintering ea silicon carbide ceramics le ho bapisa mekhoa e fapaneng.
1. Reaction sintering:
Reaction sintering ke mokhoa o tsebahalang oa ho etsa lirafshoa tsa silicon carbide ceramics. Ena ke ts'ebetso e batlang e le bonolo ebile e theko e tlase e haufi le net-to-size process. Sintering e finyelloa ka karabelo ea silicidation ka mocheso o tlase oa 1450 ~ 1600 ° C le nako e khuts'oane. Mokhoa ona o ka hlahisa likarolo tsa boholo bo boholo le sebōpeho se rarahaneng. Leha ho le joalo, e boetse e na le mefokolo ea eona. Karabelo ea siliconizing e lebisa ho 8% ~ 12% silicon e sa lefelloeng ka har'a silicon carbide, e fokotsang thepa ea eona ea mocheso o phahameng oa mocheso, ho hanyetsa kutu, le khanyetso ea oxidation. 'Me mocheso oa tšebeliso o lekanyelitsoe ka tlase ho 1350 ° C.
2. Ho hatisa ho chesang ho sintering:
Ho qoelisoa ho chesang ho chesang ke mokhoa o mong o tloaelehileng oa ho tšela lirafshoa tsa silicon carbide. Ka mokhoa ona, phofo e omeletseng ea silicon carbide e tlatsoa ka har'a hlobo ebe e futhumatsoa ha e ntse e sebelisa khatello e tsoang ho uniaxial direction. Ho futhumala hona ka nako e le 'ngoe le khatello e khothalletsa ho hasana ha likaroloana, ho phalla le ho fetisoa ka bongata, ho fella ka li-ceramics tsa silicon carbide tse nang le lijo-thollo tse ntle, tse phahameng tse lekanyelitsoeng, le thepa e babatsehang ea mochine. Leha ho le joalo, hot press sintering le eona e na le mefokolo ea eona. Tshebetso ena e rarahane ho feta mme e hloka lisebelisoa tsa boleng bo phahameng ba hlobo le lisebelisoa. Ts'ebetso ea tlhahiso e tlase 'me litšenyehelo li phahame. Ho phaella moo, mokhoa ona o loketse feela lihlahisoa tse nang le libopeho tse batlang li le bonolo.
3. Hot isostatic pressing sintering:
Hot isostatic pressing (HIP) sintering ke mokhoa o kenyelletsang ketso e kopantsoeng ea mocheso o phahameng le khase e leka-lekaneng ea isotropically high-pressure. E sebelisetsoa ho etsa sintering le densification ea silicon carbide ceramic powder, 'mele o motala kapa' mele o entsoeng pele. Le hoja HIP sintering e ka ntlafatsa ts'ebetso ea li-ceramics tsa silicon carbide, ha e sebelisoe haholo tlhahiso ea bongata ka lebaka la ts'ebetso e rarahaneng le litšenyehelo tse phahameng.
4. Ho sesa ho se na khatello:
Pressureless sintering ke mokhoa o nang le ts'ebetso e ntle haholo ea mocheso o phahameng, ts'ebetso e bonolo ea sintering le theko e tlase ea lirafshoa tsa silicon carbide. E boetse e lumella mekhoa e mengata ea ho theha, e etsa hore e tšoanelehe bakeng sa libopeho tse rarahaneng le likarolo tse teteaneng. Mokhoa ona o loketse haholo tlhahiso e kholo ea indasteri ea li-ceramics tsa silicon.
Ka kakaretso, ts'ebetso ea sintering ke mohato oa bohlokoa tlhahisong ea lirafshoa tsa SiC. Khetho ea mokhoa oa sintering e itšetlehile ka lintlha tse kang thepa e lakatsehang ea ceramic, ho rarahana ha sebopeho, litšenyehelo tsa tlhahiso le katleho. Mokhoa o mong le o mong o na le melemo le mefokolo ea oona, 'me ke habohlokoa ho hlahloba ka hloko lintlha tsena ho fumana mokhoa o nepahetseng ka ho fetisisa oa sintering bakeng sa kopo e itseng.
Nako ea poso: Aug-24-2023