Cov txheej txheem ntawm cov khoom siv ceramic

Cov txheej txheem ntau lawm ntawm cov khoom siv ceramic feem ntau suav nrog ntau cov kauj ruam, los ntawm kev xaiv cov khoom siv raw mus rau kev ua tiav ntawm cov khoom tiav, txhua qhov tseem ceeb heev. Cov hauv qab no yog cov ncauj lus kom ntxaws tsom xam ntawm cov txheej txheem ceramic pob:
1, Cov khoom xaiv thiab cov qauv
Kev xaiv cov khoom siv: Kev siv cov khoom siv high-purity thiab high-quality raw khoom yog lub hauv paus rau kev tsim cov khoom zoo nkauj ceramic. Cov khoom siv pob zeb ceramic muaj xws li alumina, silicon nitride, silicon carbide, zirconia, thiab lwm yam. Cov ntaub ntawv no muaj kev hnav zoo heev, tiv thaiv corrosion, kub tsis kam, thiab lwm yam ntxwv.
Formula: Ua kom raug thiab sib xyaw cov ntaub ntawv raw raws li kev ua tau zoo ntawm cov khoom siv ceramic. Cov mis tseem tuaj yeem suav qee cov tshuaj ntxiv, xws li Sintering AIDS, los txhawb Densification thiab Kev Ua Tau Zoo Txhim Kho thaum lub sijhawm Sinteringing.
2, tsim
Muaj ntau txoj hauv kev los tsim cov pob zeb ceramic, suav nrog cov hauv qab no:
Dry pressing molding: Ncuav cov hmoov rau hauv pwm thiab nias nws mus rau hauv ib qho duab los ntawm kev siv lub zog sab nraud. Txoj kev no yooj yim rau kev khiav lag luam, tab sis muaj qhov raug txwv, thiab tsim nyog rau cov khoom siv ceramic uas tsis tas yuav muaj qhov raug siab.
Isostatic siab sib sau: siv lub incompressibility thiab sib kis ntawm lub siab ntawm cov kua xov xwm los nias cov hmoov dawb paug nyob rau hauv ib tug isotropic yam. Cov pob ceramic cov khoom tsim los ntawm cov qauv no muaj qhov chaw zoo, ua kom haum rau cov khoom lag luam siab-precision ceramic npas. Txawm li cas los xij, cov khoom siv isostatic nias yog kim thiab muaj teeb meem demolding, uas txwv nws daim ntawv thov hauv kev lag luam loj.
Squeezing: Squeezing cov av nplaum rau hauv cov pob zeb ceramic siv cov pwm hlau. Txoj kev no tsim nyog rau kev tsim cov pob zeb perforated, tab sis cov khoom ua tiav ceramic tuaj yeem muaj qhov tsis xws luag thiab cov npoo seem.
Tes molding: xws li tes rubbing molding, feem ntau yog siv los ua cov pob zeb ceramic nrog cov kab loj dua, tab sis nrog cov duab tsis zoo.
3, Sintering
Sintering yog ib kauj ruam tseem ceeb hauv cov txheej txheem ntawm cov khoom siv ceramic, uas txiav txim siab qhov kev ua tau zoo kawg ntawm cov khoom siv ceramic.
Degreasing: Ua ntej sintering, nws yog ib qho tsim nyog yuav tsum degrease lub pob ceramic kom tshem tawm cov organic teeb meem thiab ya raws.
Cov txheej txheem sintering: Muab cov degreased ceramic pob rau hauv qhov chaw kub kub rau sintering. Thaum lub sij hawm sintering txheej txheem, hais nyob rau hauv lub ceramic pob dawb paug undergo cov khoom tsiv teb tsaws, grain loj hlob tshwm sim, pores raug tshem tawm, thiab thaum kawg ib tug ntom polycrystalline ceramic khoom yog tsim. Cov yam ntxwv xws li sintering kub, lub sij hawm, thiab cua muaj feem cuam tshuam rau sintering nyhuv.
4, Kev Ua Haujlwm thiab Kev Xeem
Mechanical processing: Lub sintered ceramic pob khoob yuav tsum tau ua tiav kom tshem tawm qhov tsis xws luag thiab ua tiav qhov yuav tsum tau muaj qhov tseeb. Cov txheej txheem ua tiav suav nrog kev sib tsoo ntxhib, sib tsoo zoo thiab lwm cov kauj ruam, feem ntau siv silicon carbide, boron carbide, dag pob zeb diamond hmoov thiab lwm yam abrasives.
Kev Ntsuas: Ua qhov ntsuas nruj ntawm cov khoom siv ceramic, suav nrog kev ntsuas qhov tseeb, qhov roughness, hardness, hnav tsis kam, thiab lwm yam ntsuas. Tsuas yog cov pob zeb ceramic uas ua tau raws li qhov yuav tsum tau ua tuaj yeem xa tuaj raws li cov khoom tiav.
5, Lwm cov txheej txheem tshwj xeeb
Rau qee qhov kev ua tau zoo tshwj xeeb ceramic pob, xws li silicon nitride ceramic pob, cov txheej txheem tsim khoom yuav nyuaj dua. Piv txwv li, cov txheej txheem synthesis ntawm silicon nitride hmoov muaj xws li silicon hmoov nitriding txoj kev thiab chemical synthesis method, tom kawg uas ua cov hmoov nrog siab purity, zoo sphericity, thiab siab sintering kev ua si. Thaum lub sij hawm sintering txheej txheem, tshwj xeeb sintering txoj kev xws li microwave sintering, kub nias sintering, thiab lwm yam yuav tsum tau kom tau zoo heev mechanical zog.
Hauv cov ntsiab lus, cov txheej txheem tsim khoom ntawm cov pob zeb ceramic yog cov txheej txheem nyuaj thiab muag heev, muaj ntau theem xws li xaiv cov khoom siv, kev tsim, molding, sintering, ua, thiab kuaj. Txhua theem yuav tsum muaj kev tswj xyuas nruj kom ntseeg tau tias qhov kev ua tau zoo thiab qhov zoo ntawm cov khoom kawg ua tau raws li qhov yuav tsum tau ua.