Ọdịnaya carbon nke mgbawa ihe nlele ọ bụla dị iche, yana ọdịnaya carbon nke A-2.5 awt.% na oke a, na-emepụta ihe dị oke njọ nke na-enweghị oghere ọ bụla, nke mejupụtara mkpụrụ silicon carbide kesara n'otu aka ahụ na silicon efu. Ka mmụba nke mgbakwunye carbon na-abawanye, ọdịnaya nke silicon carbide nke mmeghachi omume na-abawanye nwayọ nwayọ, nha mkpụrụ silicon carbide na-abawanye, silicon carbide na-ejikọkwa ibe ya n'ụdị ọkpụkpụ. Agbanyeghị, oke ọdịnaya carbon nwere ike ibute carbon fọdụrụ n'ahụ sintered ngwa ngwa. Mgbe a mụbara carbon black ruo 3a, sintering nke ihe nlele ahụ ezughị ezu, "etiti" ojii na-apụtakwa n'ime.
Mgbe carbon na-emeghachi omume na silicon gbazere agbaze, ọnụego mgbasawanye olu ya bụ 234%, nke na-eme ka obere nhazi nke silicon carbide nke na-emeghachi omume na ọdịnaya carbon dị na billet ahụ dị nso. Mgbe ọdịnaya carbon dị na billet ahụ dị obere, silicon carbide nke mmeghachi omume silicon-carbon na-emepụta ezughị iji mejupụta oghere gburugburu ntụ ntụ carbon ahụ, na-ebute nnukwu silicon efu na sample ahụ. Ka mmụba nke ọdịnaya carbon dị na billet ahụ, silicon carbide nke na-emeghachi omume nwere ike ijupụta oghere gburugburu ntụ ntụ carbon ahụ kpamkpam ma jikọọ silicon carbide mbụ ahụ ọnụ. N'oge a, ọdịnaya silicon efu dị na sample ahụ na-ebelata ma njupụta nke ahụ gbazere agbaze na-abawanye. Agbanyeghị, mgbe enwere carbon karịa na billet ahụ, silicon carbide nke abụọ nke mmeghachi omume dị n'etiti carbon na silicon na-agba gburugburu toner ahụ ngwa ngwa, na-eme ka ọ sie ike maka silicon gbazere agbaze ịkpọtụrụ toner ahụ, na-ebute carbon fọdụrụ na ahụ gbazere agbaze.
Dịka nsonaazụ XRD si kwuo, nhazi nke usoro mmeghachi omume-sintered sic bụ α-SiC, β-SiC na silicon efu.
N'ime usoro nke ime ka mmeghachi omume okpomọkụ dị elu sikwuo ike, atọm carbon na-akwaga na ọnọdụ mbụ na elu SiC β-SiC site na nhazi silicon α-secondary. Ebe ọ bụ na mmeghachi omume silicon-carbon bụ mmeghachi omume exothermic nkịtị nwere nnukwu okpomọkụ mmeghachi omume, ịjụ oyi ngwa ngwa mgbe obere oge nke mmeghachi omume okpomọkụ dị elu na-eme ka njikọ nke carbon gbazee na silicon mmiri mmiri dịkwuo elu, nke mere na mkpụrụ β-SiC na-apụta n'ụdị carbon, si otú a na-emeziwanye ihe onwunwe nke ihe ahụ. Ya mere, nhazi ọka β-SiC nke abụọ bara uru maka mmezi nke ike ịgbagọ. Na sistemụ mejupụtara Si-SiC, ọdịnaya nke silicon efu na ihe ahụ na-ebelata ka mmụba nke ọdịnaya carbon na ihe eji emepụta ihe.
Mmechi:
(1) Ọbara nke ihe na-eme ka ihe na-eme ka ihe na-adịghị mma nke carbon ojii na-abawanye; pH ahụ na-abawanye nwayọ nwayọ.
(2) Ka ọnụọgụ carbon dị n'ahụ na-abawanye, njupụta na ike ịgbagọ nke seramiiki ndị e ji usoro ịpị mee na-ebu ụzọ mụbaa wee belata. Mgbe ọnụọgụ carbon ojii dị okpukpu abụọ na ọkara nke ọnụọgụ mbụ, ike mgbagọ atọ na njupụta buru ibu nke akwụkwọ ndụ akwụkwọ ndụ mgbe a gbasịrị mmeghachi omume dị elu nke ukwuu, nke bụ 227.5mpa na 3.093g/cm3, n'otu n'otu.
(3) Mgbe ahụ nwere oke carbon gbazere agbaze, mgbawa na mpaghara "sanwichi" ojii ga-apụta n'ahụ ahụ. Ihe kpatara mgbawa ahụ bụ na gas silicon oxide nke a na-emepụta n'oge mmeghachi omume sintering adịghị mfe ịpụpụta, ọ na-agbakọta nwayọ nwayọ, nrụgide na-arị elu, mmetụta ya na-eduga na mgbawa nke billet. N'ime mpaghara "sanwichi" ojii dị n'ime sintering ahụ, enwere nnukwu carbon nke na-adịghị etinye aka na mmeghachi omume ahụ.
Oge ozi: Julaị-10-2023