Silicon carbide (SiC) yog ib yam khoom siv uas siv ntau yam kev lag luam vim nws qhov nyuaj, thermal stability, thiab tshuaj lom neeg tsis kam. Ntawm ntau hom, cov raj silicon carbide tau txais txiaj ntsig tshwj xeeb rau lawv qhov ruaj khov thiab kev ua tau zoo hauv cov chaw ib puag ncig hnyav. Tsab xov xwm no yuav nkag mus rau hauv cov txheej txheem nyuaj ntawm kev tsim khoom.silicon carbide raj, tsom mus rau kev tsim cov tshuaj tiv thaiv-sintered silicon carbide ceramic tubes.
Kev Nkag Siab Txog Silicon Carbide
Ua ntej peb nkag mus rau hauv cov txheej txheem tsim khoom, nws yog ib qho tseem ceeb kom nkag siab tias silicon carbide yog dab tsi. Silicon carbide yog ib qho sib xyaw ua ke ntawm silicon thiab carbon uas paub txog nws cov yam ntxwv tshwj xeeb. Nws yog ib qho semiconductor uas tiv taus qhov kub siab, oxidation, thiab corrosion. Cov yam ntxwv no ua rau cov raj silicon carbide zoo tagnrho rau kev siv hauv kev lag luam xws li aerospace, automotive, thiab kev ua tshuaj lom neeg.
Kev npaj cov khoom siv raw
Kauj ruam thawj zaug hauv kev tsim cov raj silicon carbide yog npaj cov khoom siv raw. Cov hmoov silicon zoo thiab cov hmoov carbon yog cov yam ntxwv tseem ceeb rau kev tsim cov silicon carbide ua haujlwm siab (RBSC). Qhov huv ntawm cov hmoov no yog qhov tseem ceeb; txhua yam tsis huv yuav cuam tshuam rau qhov zoo ntawm cov khoom kawg. Tsis tas li ntawd, qhov faib ntawm cov hmoov me me yuav tsum tau tswj hwm kom zoo. Qhov loj me ntawm cov khoom sib npaug ua kom ntseeg tau tias cov khoom teb sib npaug thaum lub sijhawm sintering, ua rau cov khoom kawg ntom dua thiab muaj zog dua.
Cov Khoom Xyaws thiab Kev Sib Tov
Thaum cov khoom siv raw tau npaj tiav lawm, kauj ruam tom ntej yog kev sib xyaw thiab sib tov. Cov txheej txheem no suav nrog kev tswj hwm qhov sib piv ntawm cov hmoov silicon rau cov hmoov carbon. Qhov sib piv kom raug yog qhov tseem ceeb vim nws txiav txim siab txog cov tshuaj lom neeg uas yuav tshwm sim thaum lub sijhawm sintering. Kev sib tov cov hmoov kom huv si kom ntseeg tau tias kev faib tawm sib npaug yog qhov tseem ceeb kom ua tiav kev tsim silicon carbide. Kauj ruam no yog qhov tseem ceeb; txhua qhov tsis sib xws hauv qhov sib tov tuaj yeem ua rau muaj qhov tsis zoo hauv lub raj silicon carbide kawg.
Kev tsim cov duab ntawm lub yeeb nkab
Thaum cov txheej txheem sib xyaw thiab sib tov tiav lawm, kauj ruam tom ntej yog ua kom cov yeeb nkab zoo li cas. Qhov no tuaj yeem ua tiav los ntawm ntau txoj kev, suav nrog kev nias txias isostatic (CIP) lossis extrusion. CIP cuam tshuam nrog kev siv lub zog sib npaug rau cov hmoov sib xyaw hauv lub pwm, ua rau muaj cov duab compact thiab zoo. Xwb, extrusion tso cai rau kev ua kom cov khoom siv zoo li cas tas mus li, uas yog qhov tshwj xeeb tshaj yog rau kev tsim cov yeeb nkab ntev dua. Kev xaiv ntawm txoj kev ua kom zoo li cas nyob ntawm qhov loj me thiab cov lus qhia ntawm cov khoom kawg.
Cov txheej txheem sintering
Cov txheej txheem sintering yog qhov uas lub khawv koob tshwm sim. Lub raj silicon carbide uas tau tsim lawm raug muab tso rau hauv lub cub tawg kub siab nrog kev tswj hwm qhov ceev thiab lub sijhawm tuav. Thaum lub sijhawm no, cov hmoov silicon thiab cov hmoov carbon sib xyaw ua ke los tsim cov qauv silicon carbide ntom ntom. Qhov kub sintering feem ntau yog ntawm 1400 ° C thiab 2000 ° C, nyob ntawm cov qauv tshwj xeeb thiab cov khoom xav tau ntawm cov khoom kawg. Cov kauj ruam no yog qhov tseem ceeb vim nws txiav txim siab lub zog kho tshuab thiab kev ruaj khov thermal ntawm lub raj silicon carbide.
Kev siv tshuab ua tiav tom qab
Tom qab ua tiav cov txheej txheem sintering, lub raj silicon carbide yuav raug ua tiav tom qab ua tiav. Cov theem no suav nrog kev ua haujlwm thiab kev txhuam kom zoo nkauj kom tau raws li qhov ntev thiab qhov zoo ntawm qhov chaw. Kev ua haujlwm yuav suav nrog kev txiav, sib tsoo lossis kev khawb kom ua tiav qhov ntev uas xav tau, thaum kev txhuam kom zoo nkauj ua rau lub raj zoo nkauj thiab ua haujlwm tau zoo. Kev ua tiav tom qab yog qhov tseem ceeb kom ntseeg tau tias cov khoom kawg ua tau raws li cov qauv kev lag luam thiab cov lus qhia ntawm cov neeg siv khoom.
Kev Tswj Xyuas Zoo
Thoob plaws hauv cov txheej txheem tsim khoom, peb siv cov kev ntsuas tswj kom zoo kom ntseeg tau tias cov raj silicon carbide ua tau raws li cov qauv tsim nyog. Qhov no suav nrog kev sim qhov huv ntawm cov khoom siv raw, saib xyuas qhov sib xws ntawm cov txheej txheem sib tov, thiab tshuaj xyuas thaum lub sijhawm thiab tom qab sintering. Cov txheej txheem siab heev xws li X-ray diffraction thiab scanning electron microscopy tuaj yeem siv los tshuaj xyuas cov qauv me me ntawm silicon carbide kom ntseeg tau tias nws ua tau raws li cov qauv kev ua tau zoo tsim nyog.
Daim Ntawv Thov ntawm Silicon Carbide Tube
Cov raj silicon carbide siv rau ntau yam kev siv vim lawv cov khoom zoo heev. Hauv kev lag luam tshuaj lom neeg, lawv siv los xa cov kua dej corrosive, thaum nyob rau hauv kev lag luam aerospace, lawv siv ua cov khoom hauv qhov chaw kub siab. Tsis tas li ntawd, cov raj silicon carbide siv ntau dua hauv kev siv hluav taws xob, xws li nuclear reactors thiab gas turbines, qhov twg lawv lub peev xwm los tiv taus cov xwm txheej hnyav yog qhov tseem ceeb heev.
Hauv kev xaus lus
Kev tsim cov raj silicon carbide yog ib qho txheej txheem nyuaj thiab nyuaj heev uas yuav tsum tau ua tib zoo saib xyuas txhua yam ntawm txhua theem. Txij li kev npaj cov khoom siv raw zoo mus rau kev tswj hwm qhov tseeb ntawm cov txheej txheem sintering, txhua kauj ruam ua lub luag haujlwm tseem ceeb hauv qhov zoo thiab kev ua tau zoo ntawm cov khoom kawg. Raws li kev lag luam txuas ntxiv nrhiav cov ntaub ntawv uas tuaj yeem tiv taus cov xwm txheej hnyav, qhov kev thov rau cov raj silicon carbide yuav loj hlob, ua rau nws tseem ceeb dua los nkag siab txog lawv cov txheej txheem tsim khoom. Txawm hais tias siv rau kev siv hauv kev lag luam lossis kev siv thev naus laus zis siab heev, cov raj silicon carbide sawv cev rau kev nce qib loj hauv kev tshawb fawb txog cov ntaub ntawv, muab kev ruaj khov thiab kev ntseeg siab hauv ntau qhov chaw ib puag ncig.
Lub sijhawm tshaj tawm: Lub Peb Hlis-26-2025