Porcelain yesilicon carbide ine simba rekudzvanya zvakanaka pakupisa kwekunze, inodzivirira kupisa kuoxidation yemhepo, inodzivirira kupera, inodzivirira kupisa, inodzivirira kuwedzera kwehuwandu hwemhepo, inodzivirira kupisa zvakanyanya, inodzivirira kupisa uye inoparadza, inodzivirira moto nezvimwe zvinhu zvemhando yepamusoro. Inoshandiswa zvakanyanya mumotokari, otomatiki yemakanika, dziviriro yezvakatipoteredza, mainjiniya emuchadenga, zvishandiso zvemagetsi zvine ruzivo, simba remagetsi nedzimwe nzvimbo, yave ceramics yekuvaka isingadhuri uye isingatsiviwi muminda yakawanda yemaindasitiri.
Kupisa kusina kumanikidzwa kunozivikanwa senzira yeSiC calcination inovimbisa. Kune michina yakasiyana-siyana yekukanda inoenderera mberi, kupisa kusina kudzvanywa kunogona kukamurwa kuita solid phase calcination uye high performance liquid phase calcination. Nekuwedzera B neC zvakakodzera (oxygen content iri pasi pe2%) pamwe chete muBeta SiC powder yakanaka kwazvo, S. Proehazka inopisirwa muSIC calcined body ine huwandu hwepamusoro pe98% muna 2020, neAl2O3 neY2O3 sezviwedzero. Calcined 0.5m-SiC pasi pe1850-1950 (particle surface ine SiO2 diki), mhedziso ndeyekuti density yeSiC porcelain inodarika 95% ye basic theoretical density, grain size idiki, uye avhareji saizi yakakura, inova 1.5μm.
Reactive sintering silicon carbide inoreva maitiro ese ekuratidza porous structure billet ine liquid phase kana high performance liquid phase, kuvandudza mhando ye billet, kuderedza vent buri, uye calcining chigadzirwa chapera nesimba rakati uye divi rakarurama. Plutonium-sic powder ne high purity graphite zvinosanganiswa mune imwe part uye zvinopiswa kusvika anenge 1650 kuti zvigadzire bvudzi embryo. Panguva imwe chete, inopinda kana kupinda musimbi kuburikidza ne liquid phase Si, inoonekwa ne silicon carbide kuti igadzire plutonium-sic, uye inobatana ne plutonium-sic particles dziripo. Mushure mekupinda kweSi, reaction sintered body ine density yakadzama uye saizi isina kuvhurwa inogona kuwanikwa. Zvichienzaniswa nedzimwe nzira dze sintering, mukuita kwe high density reaction sintering size shanduko idiki, inogona kugadzira saizi chaiyo yezvinhu, asi kune SiC yakawanda pamuviri we calcined, hunhu hwekupisa hwe reaction sintered SiC porcelain huchava hwakaipa. Zvigadzirwa zveSiC zvisina kumanikidzwa, zviumbwa zveSiC zvine calcium zvinopisa uye zviumbwa zveSiC zvine reaction sintered zvine hunhu hwakasiyana.
Vagadziri vesilicon carbide inogadzira simbi inochinja-chinja: Semuenzaniso, SiC porcelain padanho re calcined relative density uye bend strength, hot pressing sintering uye hot isostatic pressing calcination yakawanda, uye reactive sintering SiC yakaderera. Panguva imwe chete, hunhu hwepanyama hweSiC porcelain hunochinja nekuchinja kwe calcination modifier. SiC porcelain isingapinze simba, hot press sintering uye reaction sintering ine alkaline resistance yakanaka uye acid resistance, asi SiC porcelain inogadzira simbi inodzivisa zvishoma HF nedzimwe acid corrosion yakasimba kwazvo. Kana tembiricha yemhepo iri pasi pe900, simba rekukotama reSiC porcelain yakawanda rakakwira zvakanyanya kupfuura re high temperature sintered porcelain, uye simba rekukotama re reactive sintered SiC porcelain rinodonha zvakanyanya kana rapfuura 1400. (Izvi zvinokonzerwa nekudonha kamwe kamwe kwesimba rekukotama kweimwe huwandu hwegirazi rakaiswa laminated Si kupfuura tembiricha yakati mumuviri wakaiswa calcium. Kushanda kwekupisa kwakanyanya kweSiC ceramics yakapiswa isina pressure calcination uye pasi pekupisa constant static pressure kunonyanya kukanganiswa nemhando dzezvinowedzera.
Nguva yekutumira: Mbudzi-07-2023