Seramiki silikọn carbide nwere ike okpomọkụ dị elu, iguzogide oxidation dị elu, ezigbo nguzogide iyi, ezigbo nkwụsi ike okpomọkụ, obere ọnụọgụ nke mgbasawanye okpomọkụ, nnukwu nguzozi okpomọkụ, ike dị elu, nguzogide okpomọkụ, nguzogide nchara kemịkalụ na ihe ndị ọzọ dị mma. A na-eji ya eme ihe nke ukwuu na ụgbọala, nhazi igwe, nchekwa gburugburu ebe obibi, teknụzụ ikuku, eletrọnịkị ozi, ike na mpaghara ndị ọzọ, ọ ghọwokwa seramiki nhazi a na-apụghị ịgbanwe agbanwe nke nwere arụmọrụ dị mma n'ọtụtụ ngalaba ụlọ ọrụ mmepụta ihe. Ugbu a ka m gosi gị!
Ịgbasa ihe na-enweghị nrụgide
A na-ewere usoro sintering enweghị nrụgide dị ka ụzọ kachasị mma maka sintering SiC. Dịka usoro sintering dị iche iche si dị, enwere ike kewaa sintering na-enweghị nrụgide gaa na sintering siri ike na sintering mmiri mmiri. Site na β-A nke ukwuu dị mma, etinyere oke B na C (ọkwa oxygen na-erughị 2%) na ntụ ntụ SiC n'otu oge, a na-etinye s. proehazka na ahụ sintered SiC nke nwere njupụta dị elu karịa 98% na 2020 ℃. A. Mulla et al. Ejiri Al2O3 na Y2O3 mee ihe dị ka ihe mgbakwunye ma sintered na 1850-1950 ℃ maka 0.5 μm β-SiC (elu ihe dị n'ime ya nwere obere SiO2). Njupụta nke seramiiki SiC enwetara karịrị 95% nke njupụta echiche, nha ọka dịkwa obere ma nha nkezi. Ọ bụ 1.5 microns.
Ịkpụcha ọkụ ọkụ
A pụrụ iji SiC dị ọcha mee ihe n'ụzọ dị mfe naanị n'okpomọkụ dị oke elu na-enweghị ihe mgbakwunye sintering ọ bụla, ya mere ọtụtụ mmadụ na-etinye usoro sintering ọkụ maka SiC. Enweela ọtụtụ akụkọ gbasara sintering ọkụ nke SiC site na ịgbakwunye ihe enyemaka sintering. Alliegro et al. Ha mụrụ mmetụta nke boron, aluminom, nickel, iron, chromium na ihe mgbakwunye ígwè ndị ọzọ na njupụta SiC. Nsonaazụ ya na-egosi na aluminom na ígwè bụ ihe mgbakwunye kachasị dị irè iji kwalite sintering ọkụ SiC. Fflange mụrụ mmetụta nke itinye oke Al2O3 dị iche iche na njirimara nke SiC a pịrị ọkụ. A na-ewere na njupụta nke SiC a pịrị ọkụ metụtara usoro nke ịgbasa na mmiri ozuzo. Agbanyeghị, usoro sintering ọkụ nwere ike imepụta naanị akụkụ SiC nwere ọdịdị dị mfe. Ọnụọgụ ngwaahịa nke usoro sintering ọkụ nke otu oge mepụtara dị obere, nke na-adịghị mma maka mmepụta ụlọ ọrụ.
Ịpịpụta ihe na-ekpo ọkụ nke isostatic
Iji merie adịghị ike nke usoro sintering ọdịnala, ejiri ụdị B na ụdị C mee ihe dị ka ihe mgbakwunye ma jiri teknụzụ sintering dị ọkụ nke isostatic mee ihe. Na 1900 ° C, e nwetara obere seramiiki kristal nwere njupụta karịrị 98, ike ịgbagọkwa na okpomọkụ ụlọ nwere ike iru 600 MPa. Ọ bụ ezie na sintering dị ọkụ nke isostatic nwere ike imepụta ngwaahịa dị oke ibu nwere ọdịdị dị mgbagwoju anya na ezigbo ihe onwunwe igwe, a ga-emechi sintering ahụ, nke siri ike inweta mmepụta ụlọ ọrụ.
Mmeghachi omume sintering
Carbide silicon sintered nke a na-akpọkwa carbide silicon nke ejiri aka ya jikọta, na-ezo aka na usoro nke billet porous na-emeghachi omume na usoro gas ma ọ bụ mmiri mmiri iji melite mma billet, belata porosity, na ngwaahịa sinter emechara na ike na nha ụfọdụ. Were ntụ ntụ α-SiC na graphite gwakọta n'otu akụkụ ma kpoo ọkụ ruo ihe dị ka 1650 ℃ iji mepụta billet square. N'otu oge ahụ, ọ na-abanye ma ọ bụ banye n'ime billet site na gas Si ma na-emeghachi omume na graphite iji mepụta β-SiC, yana ihe ndị dị adị α-SiC. Mgbe Si batara kpamkpam, enwere ike nweta ahụ sintered nke mmeghachi omume nwere njupụta zuru oke na nha na-adịghị ebelata. Ma e jiri ya tụnyere usoro sintering ndị ọzọ, mgbanwe nha nke sintering mmeghachi omume na usoro njupụta dị obere, enwere ike ịkwadebe ngwaahịa ndị nwere nha ziri ezi. Agbanyeghị, ịdị adị nke nnukwu SiC na ahụ sintered na-eme ka ihe onwunwe okpomọkụ dị elu nke seramiiki sintered SiC ka njọ.
Oge ozi: Juun-08-2022