Kupaka kwa SiC ndi chiyani?

Zovala za Silicon Carbide (SiC).Amakhala ofunikira kwambiri pamapulogalamu osiyanasiyana apamwamba chifukwa cha mawonekedwe awo odabwitsa akuthupi ndi mamankhwala. Amagwiritsidwa ntchito kudzera mu njira monga Physical kapena Chemical Vapor Deposition (CVD), kapena njira zopopera mankhwala,Zovala za SiCsinthani mawonekedwe apamwamba a zigawo, zomwe zimapereka kukhazikika komanso kukana kuzovuta kwambiri.

Chifukwa chiyani SiC Coatings?
SiC imadziwika chifukwa cha malo ake osungunuka kwambiri, kuuma kwake kwapadera, komanso kukana kwamphamvu kwa dzimbiri ndi okosijeni. Makhalidwe awa amapangaZovala za SiCmakamaka polimbana ndi malo ovuta omwe amakumana nawo muzamlengalenga ndi mafakitale achitetezo. Makamaka, kukana kwabwino kwa SiC pa kutentha kwapakati pa 1800-2000 ° C kumapangitsa kukhala chisankho chabwino pamapulogalamu omwe amafunikira moyo wautali komanso kudalirika pakutentha kwambiri komanso kupsinjika kwamakina.
Common Njira zaKupaka kwa SiCNtchito:
1.Chemical Vapor Deposition (CVD):
CVD ndi njira yodziwika bwino yomwe chigawo chomwe chiyenera kuphimbidwa chimayikidwa mu chubu chochitira. Pogwiritsa ntchito Methyltrichlorosilane (MTS) monga cholozera, SiC imayikidwa pamwamba pa chigawocho pa kutentha kwa 950-1300 ° C pansi pa zovuta zochepa. Njira iyi imatsimikizira yunifolomu,zokutira zapamwamba za SiC, kuonjezera mphamvu ya chigawocho ndi moyo wautali.

2.Precursor Impregnation ndi Pyrolysis (PIP):
Njirayi imaphatikizapo kusamalidwa koyambirira kwa chigawocho ndikutsatiridwa ndi vacuum impregnation mu njira ya ceramic precursor solution. Pambuyo pa impregnation, chigawocho amachitira pyrolysis mu ng'anjo, kumene utakhazikika kutentha firiji. Zotsatira zake ndi zokutira zolimba za SiC zomwe zimapereka chitetezo chambiri pakuwonongeka ndi kukokoloka.

Mapulogalamu ndi Ubwino:
Kugwiritsiridwa ntchito kwa zokutira za SiC kumawonjezera moyo wa zigawo zofunika kwambiri ndikuchepetsa ndalama zokonzetsera popereka chiwongolero cholimba, chotetezera chomwe chimateteza kuwonongeka kwa chilengedwe. Mwachitsanzo, muzamlengalenga, zokutirazi ndizofunika kwambiri poteteza kutenthedwa ndi kutentha komanso kuvala kwamakina. Mu zida zankhondo, zokutira za SiC zimakulitsa kudalirika ndi magwiridwe antchito a magawo ofunikira, kuwonetsetsa kukhulupirika kwa magwiridwe antchito ngakhale pamavuto.
Pomaliza:
Pamene mafakitale akupitilira kukankhira malire a magwiridwe antchito ndi kulimba, zokutira za SiC zitenga gawo lofunikira pakupititsa patsogolo sayansi ndi uinjiniya. Ndi kafukufuku wopitilira ndi chitukuko, zokutira za SiC mosakayikira zidzakulitsa kufikira kwawo, ndikukhazikitsa miyezo yatsopano pazovala zapamwamba kwambiri.