Reaction-sintered silicon carbide porcelain ine simba rakanaka rekumanikidza pane tembiricha ye ambient, kupisa kupisa kune mhepo oxidation, kunaka kupfeka kusagadzikana, kunaka kupisa kupisa, diki coefficient yekuwedzera kwemutsara, yakanyanya kupisa kupisa coefficient, kuoma kwakanyanya, kupisa kupisa uye kuparadza, kudzivirira moto uye humwe hunhu hwemhando yepamusoro. Inoshandiswa zvakanyanya mumotokari, mechanical otomatiki, ecological kuchengetedza kwezvakatipoteredza, aerospace engineering, ruzivo zvemukati zvemagetsi zvigadziriso, simba remagetsi uye mamwe minda, yave inodhura-inoshanda uye isingadzokerike zvimiro zvekeramic muminda yakawanda yemaindasitiri.
Pressureless sintering inozivikanwa seanovimbisa SiC calcination nzira. Kune akasiyana anoenderera mberi achikanda michina, kudzvanya-yemahara sintering inogona kukamurwa kuita yakasimba chikamu calcination uye yakakwirira kuita kwemvura chikamu calcination. Nekuwedzera zvakakodzera B uye C (oxygen content isingasviki 2%) pamwe chete muBeta SiC powder yakanyatsonaka, S. Proehazka inoputirwa muSIC calcined body ine hukama hunopfuura 98% pa2020, neAl2O3 uye Y2O3 se additives. Calcined 0.5m-SiC pasi pe1850-1950 (particle surface ine SiO2 diki), mhedziso ndeyekuti density yeSiC porcelain inodarika 95% yeiyo basic theoretical density, saizi yezviyo idiki, uye avhareji saizi yakakura, iyo iri 1.5μm.
Reactive sintering silicon carbide inoreva iyo yese maitiro ekuratidza porous chimiro billet ine mvura chikamu kana yakakwira performance fluid chikamu, kuvandudza mhando yebillet, kudzikisa gomba rekubuda, uye kuverengera chigadzirwa chakapedzwa neimwe simba uye dhigirii chaiyo. Plutonium-sic poda uye high purity graphite inosanganiswa mune imwe chikamu uye inopisa kusvika 1650 kugadzira bvudzi embryo. Panguva imwecheteyo, inopinda kana kupinda musimbi kuburikidza nechikamu chemvura Si, inoratidzira nesilicon carbide kuti igadzire plutonium-sic, uye fuses neiyo iripo plutonium-sic particles. Mushure mekupinda kweSi, maitiro akaitwa sintered ane akadzama hama density uye saizi isina kuvharwa inogona kuwanikwa. Kuenzaniswa nedzimwe nzira dzekupisa, mukuita kwepamusoro density reaction sintering size shanduko idiki, inogona kugadzira saizi chaiyo yezvinhu, asi pane yakawanda yeSiC pane calcined muviri, yakanyanya tembiricha maitiro ekuita sintered SiC porcelain. zvichanyanya kuipa. Isiri-kudzvanywa calcined SiC ceramics, inopisa isostatic calcined SiC ceramics uye reaction sintered SiC ceramics ane hunhu hwakasiyana.
Reactive sintering silicon carbide vagadziri: Semuyenzaniso, SiC porcelain pamwero we calcined hama density uye kukombama simba, inopisa kudzvanya sintering uye inopisa isostatic pressing calcination yakawanda, uye reactive sintering SiC yakadzikira. Panguva imwecheteyo, zvinhu zvemuviri zveSiC porcelain zvinoshanduka nekuchinja kwe calcination modifier. Iyo isiri-pressure sintering, inopisa inopisa sintering uye reaction sintering yeSiC porcelain ine yakanaka alkaline resistance uye acid resistance, asi reaction sintered SiC porcelain ine kusimba kushoma kuHF uye imwe yakasimba kwazvo asidhi ngura. Kana tembiricha yepakati iri pasi pe900, simba rekukotama reSiC porcelain zhinji rinokwira zvakanyanya kupfuura retembiricha yakakwira sintered porcelain, uye kukotama kwesimba reactive sintered SiC porcelain inodonha zvakanyanya kana yadarika 1400. (Izvi zvinokonzerwa nekukasira kudonhedza mukukotama simba reimwe chiyero chegirazi rakacheneswa Si kupfuura imwe tembiricha mumuviri wakarukwa sintered pasina kudzvanywa calcination uye pasi inopisa inogara static pressure inonyanya kukanganiswa nemhando dzekuwedzera.
Nguva yekutumira: Jun-19-2023