SiC txheej yog dab tsi?

Silicon Carbide (SiC) txheejtau dhau los ua qhov tseem ceeb hauv ntau yam kev ua haujlwm siab vim lawv lub cev thiab tshuaj lom neeg zoo kawg li. Siv los ntawm cov txheej txheem xws li Lub Cev lossis Tshuaj Vapor Deposition (CVD), lossis cov txheej txheem txau,SiC coatingshloov cov khoom nto ntawm cov khoom, muab kev txhim kho durability thiab tsis kam mus rau huab cua.

Vim li cas SiC Coatings?
SiC muaj npe nrov rau nws qhov siab melting point, tshwj xeeb hardness, thiab superior tiv thaiv corrosion thiab oxidation. Cov yam ntxwv no ua rauSiC coatingstshwj xeeb tshaj yog muaj txiaj ntsig zoo rau kev tiv thaiv ib puag ncig hnyav uas tau ntsib hauv aerospace thiab kev lag luam tiv thaiv. Tshwj xeeb, SiC qhov zoo tshaj plaws ablation tsis kam ntawm qhov kub thiab txias ntawm 1800-2000 ° C ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov uas xav tau lub neej ntev thiab kev ntseeg siab nyob rau hauv kev kub ntxhov thiab kev ntxhov siab.
Cov Txheej Txheem rauSiC txheejDaim ntawv thov:
1.Chemical Vapor Deposition (CVD):
CVD yog cov txheej txheem dav dav uas cov khoom yuav tsum tau coated yog muab tso rau hauv lub raj tshuaj tiv thaiv. Siv Methyltrichlorosilane (MTS) ua tus thawj coj, SiC tso rau ntawm qhov chaw ntawm qhov kub ntawm 950-1300 ° C nyob rau hauv cov xwm txheej tsis tshua muaj siab. Cov txheej txheem no ua kom lub cev tsis sib xws,zoo SiC txheej, txhim kho cov tivthaiv resilience thiab lifespan.

2.Precursor Impregnation thiab Pyrolysis (PIP):
Txoj kev no suav nrog kev kho ua ntej ntawm cov khoom ua raws li lub tshuab nqus tsev impregnation hauv cov tshuaj ceramic precursor. Tom qab impregnation, cov tivthaiv undergoes pyrolysis nyob rau hauv lub cub tawg, qhov twg nws yog txias rau chav tsev kub. Qhov tshwm sim yog SiC txheej muaj zog uas muab kev tiv thaiv zoo tiv thaiv kev hnav thiab yaig.

Daim ntawv thov thiab qhov zoo:
Kev siv SiC coatings txuas ntxiv lub neej ntawm cov khoom tseem ceeb thiab txo cov nqi txij nkawm los ntawm kev muab cov txheej txheem tawv, tiv thaiv kev tiv thaiv ib puag ncig kev puas tsuaj. Nyob rau hauv aerospace, piv txwv li, cov coatings no muaj nuj nqis hauv kev tiv thaiv thermal shock thiab mechanical hnav. Hauv cov khoom siv tub rog, SiC coatings txhim khu kev ntseeg tau thiab kev ua haujlwm ntawm cov khoom tseem ceeb, ua kom muaj kev ncaj ncees rau kev ua haujlwm txawm tias nyob rau hauv cov xwm txheej hnyav.
Xaus:
Raws li kev lag luam txuas ntxiv thawb cov ciam teb ntawm kev ua tau zoo thiab kav ntev, SiC txheej yuav ua lub luag haujlwm tseem ceeb hauv kev nce qib ntawm cov ntaub ntawv tshawb fawb thiab engineering. Nrog rau kev tshawb fawb thiab kev tsim kho tsis tu ncua, SiC coatings yuav undoubtedly nthuav lawv mus txog, teeb tsa cov qauv tshiab hauv cov txheej txheem ua haujlwm siab.