Cov khoom siv silicon carbide ceramicsyog cov khoom siv tseem ceeb hauv ntau yam lag luam vim lawv cov yam ntxwv tshwj xeeb, suav nrog kev tawv siab, qhov ceev tsawg thiab kev tiv taus cua sov zoo heev. Cov yam ntxwv no ua rau silicon carbide (SiC) yog qhov kev xaiv zoo tshaj plaws rau kev siv hauv kev tsim kho tshuab, tshuaj lom neeg thiab kev lag luam metallurgical, qhov cub ua haujlwm thiab ntau yam khoom siv cua sov. Tsab xov xwm no saib tob txog ntau yam kev siv ntawm silicon carbide ceramics, qhia txog lawv qhov tseem ceeb hauv kev tsim khoom niaj hnub thiab cov txheej txheem kev lag luam.
Hauv kev ua haujlwm ntawm kev tsim kho tshuab, cov khoom siv silicon carbide ceramics tau siv ntau zuj zus vim lawv qhov nyuaj thiab hnav tsis kam. Cov ntaub ntawv no yog qhov tsim nyog rau kev tsim cov khoom me me thiab cov khoom siv uas xav tau kev ruaj khov thiab kev ntseeg siab. Silicon carbide tuaj yeem tiv taus qhov kub siab yam tsis muaj kev hloov pauv lossis poob qhov kev ua haujlwm ntawm cov qauv, ua rau nws zoo tagnrho rau kev siv hauv cov tshuab ua haujlwm siab. Raws li kev lag luam txuas ntxiv xav tau cov khoom siv ua haujlwm zoo dua thiab ruaj khov, lub luag haujlwm ntawm silicon carbide ceramics hauv kev tsim kho tshuab yuav nthuav dav heev.
Cov kev lag luam tshuaj lom neeg thiab hlau kuj tau txais txiaj ntsig zoo los ntawm silicon carbide ceramics. Cov ntaub ntawv no muaj kev tiv thaiv corrosion zoo heev, tshwj xeeb tshaj yog rau cov hlau molten, slag thiab alkali hlau. Cov khoom no yog qhov tseem ceeb hauv cov chaw uas cov ntaub ntawv ib txwm yuav tsis ua haujlwm, ua rau lub sijhawm tsis ua haujlwm thiab kev saib xyuas kim heev. Qhov tseem ceeb, ntau dua 65% ntawm cov cub tawg loj thoob ntiaj teb siv cov khoom siv silicon nitride-bonded silicon carbide ua cov khoom siv lub cev cub tawg. Daim ntawv thov no tsis yog tsuas yog txuas lub neej kev pabcuam ntawm cov cub tawg los ntawm 20-40%, tab sis kuj txhim kho kev ua haujlwm zoo. Tsis tas li ntawd, silicon carbide ceramics kuj tseem siv ua cov ntaub thaiv cua sov thiab crucibles rau cov hlau smelting xws li txhuas, tooj liab thiab zinc, qhia txog nws qhov kev hloov pauv hauv kev siv kub siab.
Hauv cov qhov cub ua haujlwm hauv kev lag luam, cov khoom siv silicon carbide ceramics ua lub luag haujlwm tseem ceeb hauv kev ua kom zoo dua qub thiab kev siv hluav taws xob zoo. Kev siv cov rooj tog hauv qhov cub silicon carbide tuaj yeem txo qhov hnyav thiab qhov chaw xav tau, uas yog qhov tshwj xeeb tshaj yog rau cov lag luam xws li kev lag luam sib zog, cov ntaub ntawv tsim kho thiab cov khoom siv hluav taws xob. Qhov hnyav ntawm cov khoom siv silicon carbide pab txhim kho kev siv hluav taws xob vim tias yuav tsum muaj zog tsawg dua los ua kom lub qhov cub sov. Tsis tas li ntawd, qhov kev tiv thaiv zoo ntawm cov ntaub ntawv silicon carbide tso cai rau qhov kub hnyiab kom nce sai dua, txhim kho kev ua haujlwm ntawm qhov cub.
Cov khoom siv silicon carbide ceramics kuj tseem ceeb rau ntau yam khoom siv cua sov uas siv rau kev sintering, yaj, thiab kho cov khoom siv cua sov. Kev cua sov tsis ncaj qha nrog roj tau dhau los ua ib txoj hauv kev nyiam hauv cov txheej txheem no vim tias nws ua rau muaj kev ua haujlwm zoo dua thaum txo cov pa phem, xws li nitrogen oxides (NOx). Kev siv silicon carbide hauv cov khoom siv cua sov no tsis yog tsuas yog txhim kho kev ua tau zoo xwb tab sis kuj ua raws li kev siv zog thoob ntiaj teb los txo qhov cuam tshuam rau ib puag ncig. Raws li kev lag luam siv zog rau cov kev daws teeb meem zoo dua rau ib puag ncig, qhov kev thov rau silicon carbide ceramics rau kev siv cua sov yuav loj hlob.
Qhov ua tau ntau yam ntawm silicon carbide ceramics nthuav dav tshaj qhov kev siv ib txwm muaj vim tias lawv tau siv ntau dua hauv cov thev naus laus zis siab heev. Piv txwv li, hauv kev lag luam hluav taws xob, silicon carbide yog siv rau hauv kev tsim cov semiconductors thiab cov khoom siv fais fab. Cov khoom siv thermal conductivity siab thiab cov khoom rwb thaiv tsev hluav taws xob ntawm silicon carbide ua rau nws zoo tagnrho rau kev siv hluav taws xob zaus siab thiab kub siab. Raws li qhov kev thov rau cov khoom siv hluav taws xob zoo thiab txhim khu kev qha txuas ntxiv loj hlob, silicon carbide ceramics yuav tsum ua lub luag haujlwm tseem ceeb hauv kev tsim khoom siv hluav taws xob yav tom ntej.
Tsis tas li ntawd xwb, kev lag luam aerospace thiab automotive tau pib lees paub txog lub peev xwm ntawm silicon carbide ceramics rau cov khoom sib zog thiab lub zog siab. Silicon carbide lub peev xwm los tiv taus qhov kub thiab txias heev thiab ib puag ncig hnyav ua rau nws yog qhov kev xaiv zoo rau cov ntawv thov xws li turbine blades, brake discs, thiab lwm yam khoom tseem ceeb. Raws li cov lag luam no nrhiav kev txhim kho kev siv roj thiab txo cov pa phem, kev koom ua ke ntawm silicon carbide ceramics rau hauv lawv cov qauv tsim tuaj yeem txhim kho kev ua tau zoo thiab kev ruaj khov.
Hauv kev xaus lus, daim ntawv thov ntawm silicon carbide ceramics yog dav dav, ua tsaug rau lawv cov khoom tshwj xeeb thiab kev ua tau zoo. Los ntawm kev tsim kho tshuab mus rau kev ua tshuaj lom neeg, cov cub tawg kev lag luam thiab cov khoom siv hluav taws xob siab heev, silicon carbide ceramics tau ua pov thawj tias yog ib feem tseem ceeb ntawm kev tsim khoom niaj hnub. Raws li thev naus laus zis txuas ntxiv mus, lub peev xwm rau silicon carbide ceramics los pab txhawb rau cov kev daws teeb meem tshiab thiab kev coj ua ruaj khov yuav tsuas yog nce ntxiv. Yav tom ntej ntawm silicon carbide ceramics yog qhov zoo, thiab kev tshawb fawb thiab kev txhim kho txuas ntxiv mus yog paving txoj hauv kev rau cov ntawv thov tshiab thiab kev ua tau zoo dua hauv ntau qhov chaw.
Lub sijhawm tshaj tawm: Lub Peb Hlis-29-2025