Faifan graphite mai rufi na TaC don haɓaka lu'ulu'u guda ɗaya na SiC

Yayin da girman lu'ulu'u ɗaya na silicon carbide (SiC) ke ci gaba da girma zuwa manyan diamita da kuma ƙara ƙarfin sarrafa lahani, kwanciyar hankali da tsarkin abubuwan da ke cikin yankin zafi sun zama mahimmanci ga yawan samar da lu'ulu'u da aikin na'ura. An ƙera faifan graphite mai rufi da TaC (Tantalum Carbide) a matsayin abubuwan aiki masu ci gaba a cikin tsarin haɓakar lu'ulu'u na zahiri (PVT) SiC, suna taka muhimmiyar rawa a cikin daidaita jigilar tururi, daidaita filin zafi, da kuma sarrafa gurɓatawa.

A cikin yanayin girma na lu'ulu'u guda ɗaya na SiC wanda ke aiki a yanayin zafi mai yawa wanda yawanci ya wuce 2000 °C, abubuwan da aka saba amfani da su a cikin graphite na gargajiya suna da rauni ga lalata sinadarai, ragewar carbon, da samar da barbashi lokacin da aka fallasa su ga nau'in tururin da ke ɗauke da silicon mai amsawa. Faifan graphite mai rufi na TaC na Semixlab yana magance waɗannan ƙalubalen ta hanyar haɗa wani abu mai laushi mai laushi tare da rufin TaC mai tsari mai tsabta. Wannan ƙira tana samar da iskar gas mai sarrafawa da shinge mara aiki wanda ke ba da damar sarrafa kwararar tururin Si- da C tsakanin kayan tushe da kuma hanyar haɗin girma na lu'ulu'u.

A cikin faifan graphite mai rufi na TaC, faifan graphite mai ramuka suna aiki azaman masu daidaita kwararar tururi da masu daidaita yaɗuwa. Tsarin ramuka masu haɗin kai yana ba da damar watsawa mai sarrafawa na nau'ikan sublimated yayin da yake hana kwararar tururi mai rikitarwa da kuma matakan tattarawa na gida. Wannan jigilar taro mai sarrafawa yana ba da gudummawa kai tsaye ga haɗin girma iri ɗaya, ingantaccen daidaiton kauri na radial, da haɓaka yanayin lu'ulu'u. A lokaci guda, rufin TaC yana ware graphite na ƙasa daga hulɗar sinadarai kai tsaye da tururin Si, yana rage yawan amfani da graphite, lalacewar saman, da gurɓatar da ke da alaƙa da carbon yayin tsawaita lokacin girma.

A fannin zafi, wurin narkewar TaC mai ban mamaki (≥3880℃) da kwanciyar hankali suna tabbatar da daidaiton tsari da mannewa a ƙarƙashin zagayowar zafi mai maimaitawa. Tsarin ramuka yana ƙara ba da gudummawa ga daidaita juriyar zafi na gida, yana taimakawa wajen daidaita yanayin zafin jiki na axial da radial a cikin yankin zafi. Wannan matsakaicin zafin yana da amfani musamman ga girman boule na SiC mai girma, inda kwanciyar hankali da daidaiton zafi suke da mahimmanci don rage samuwar micropipe, rarrabuwar basal plane, da sauran lahani na kristal.

Daga mahangar sarrafa gurɓatawa, faifan graphite mai rufi na TaC suna ba da fa'ida mai yawa fiye da abubuwan da ba a rufe su ko waɗanda aka yi wa ado da su ba. Layin TaC mai yawa yana hana ƙurar graphite da sakin barbashi yadda ya kamata, yana tallafawa ƙananan matakan ƙazanta a bango da muhallin girma mai tsabta. Wannan yana fassara zuwa ingantaccen tsarkin lu'ulu'u, rage haɗarin gurɓata na nucleation, da kuma yawan samar da wafer mai yawa a ƙasa.

Semixlab yana tsarawa da ƙera faifan graphite mai rufi na TaC ta amfani da hanyoyin rufewa masu sarrafawa waɗanda ke daidaita kauri na shafi, riƙe ramuka, da zurfin shigar shafi. Wannan yana tabbatar da kwanciyar hankali na dogon lokaci ba tare da toshe ramuka ba, yana kiyaye halayen jigilar tururi daidai gwargwado a tsawon rayuwar sabis na ɓangaren. Kowane samfuri an ƙera shi tare da dacewa a cikin ƙirar tanderun SiC PVT na yau da kullun kuma ya dace da tsarin girma na lu'ulu'u na bincike da girma.