I-silicon carbide (i-SiC) yinto ekhethwayo kwiintlobo ngeentlobo zezicelo zoshishino ngenxa yobunzima bayo obubalaseleyo, ukuzinza kobushushu, kunye nokumelana neekhemikhali. Phakathi kweentlobo zayo ezininzi, iityhubhu ze-silicon carbide zixatyiswa kakhulu ngenxa yokuqina kwazo kunye nokusebenza kwazo kwiindawo ezinzima. Eli nqaku liza kujonga inkqubo enzima yokuvelisa.iityhubhu ze-silicon carbide, igxile ekuvelisweni kweetyhubhu zeseramikhi ze-silicon carbide ezifakwe kwi-reaction-sintered.
Ukuqonda iSilicon Carbide
Ngaphambi kokuba singene kwinkqubo yokwenziwa kwezinto, kubalulekile ukuqonda ukuba yintoni i-silicon carbide. I-Silicon carbide yikhompawundi ye-silicon kunye ne-carbon eyaziwa ngeempawu zayo ezibalaseleyo. Yi-semiconductor ekwaziyo ukumelana namaqondo obushushu aphezulu, i-oxidation, kunye nokugqwala. Ezi mpawu zenza iityhubhu ze-silicon carbide zilungele ukusetyenziswa kumashishini afana ne-aerospace, iimoto, kunye nokucubungula iikhemikhali.
Ukulungiswa kwezinto eziluhlaza
Inyathelo lokuqala ekwenzeni iityhubhu ze-silicon carbide kukulungiselela izinto eziluhlaza. Umgubo we-silicon osemgangathweni ophezulu kunye nomgubo we-carbon zizinto ezifunekayo ukuze kuveliswe i-silicon carbide (RBSC) esebenza kakuhle. Ubunyulu bale mibhobho bubalulekile; naluphi na ukungcola kuya kuchaphazela kakhulu umgangatho wemveliso yokugqibela. Ukongeza, ukusasazwa kobukhulu bemibhobho kufuneka kulawulwe ngononophelo. Ubungakanani bemibhobho obufanayo buqinisekisa ukuba izinto zisabela ngokulinganayo ngexesha lenkqubo yokusila, nto leyo ephumela kwimveliso yokugqibela eqinileyo neqinileyo.
Izithako kunye nokuxuba
Nje ukuba izinto eziluhlaza zilungisiwe, inyathelo elilandelayo kukudibanisa nokuxuba. Le nkqubo ibandakanya ukulawula ngokuchanekileyo umlinganiselo womgubo we-silicon kwi-carbon powder. Umlinganiselo ochanekileyo ubalulekile kuba umisela iimpendulo zeekhemikhali eziya kwenzeka ngexesha lokusila. Ukuxuba ngokupheleleyo iipowder ukuqinisekisa ukusasazwa ngokulinganayo kubalulekile ukuze kufezekiswe ukwakheka kwe-silicon carbide rhoqo. Eli nyathelo libalulekile; nakuphi na ukungangqinelani kumxube kunokubangela iziphene kwityhubhu yokugqibela ye-silicon carbide.
Ukwenza imo yombhobho
Nje ukuba inkqubo yokudibanisa nokuxuba igqityiwe, inyathelo elilandelayo kukubumba umbhobho. Oku kunokufezekiswa ngeendlela ezahlukeneyo, kubandakanya ukucinezela okubandayo (i-CIP) okanye ukukhutshelwa ngaphandle. I-CIP ibandakanya ukufaka uxinzelelo olufanayo kumgubo oxutyiweyo kwidayi, nto leyo ephumela kwimo encinci neyakhiwe kakuhle. Kungenjalo, ukukhutshelwa ngaphandle kuvumela ukubumba okuqhubekayo kwezinto, nto leyo eluncedo kakhulu ekuveliseni imibhobho emide. Ukukhetha indlela yokubumba kuxhomekeke kubungakanani obufunekayo kunye neenkcukacha zemveliso yokugqibela.
Inkqubo yokuhluza
Inkqubo yokusila kulapho umlingo wenzeka khona. Ityhubhu ye-silicon carbide eyenziweyo ifakwa kwisithando sobushushu obuphezulu ngesantya sokufudumeza esilawulwa ngokungqongqo kunye nexesha lokubamba. Ngeli nqanaba, umgubo we-silicon kunye nomgubo we-carbon zisabela ngokweekhemikhali ukuze zenze isakhiwo se-silicon carbide esixineneyo. Ubushushu bosila buhlala buphakathi kwe-1400°C kunye ne-2000°C, kuxhomekeke kwifom ethile kunye neempawu ezifunwayo zemveliso yokugqibela. Eli nyathelo libalulekile kuba limisela amandla oomatshini kunye nokuzinza kobushushu betyhubhu ye-silicon carbide.
Itekhnoloji emva kokucubungula
Emva kokuba inkqubo yokusila igqityiwe, ityhubhu ye-silicon carbide iyaqhubeka nokucutshungulwa. Eli nqanaba libandakanya ukucutshungulwa kunye nokucocwa komphezulu ukuze kuhlangatyezwane neemfuno ezichanekileyo zobukhulu kunye nomgangatho womphezulu. Ukucucwa kunokubandakanya ukusika, ukugaya okanye ukubhoboza ukuze kufezekiswe ubungakanani obufunekayo, ngelixa ukucocwa komphezulu kuphucula ubuhle kunye nokusebenza kakuhle kwetyhubhu. Ukucucwa emva kubalulekile ukuqinisekisa ukuba imveliso yokugqibela ihlangabezana nemigangatho yoshishino kunye neenkcukacha zabathengi.
Amanyathelo oLawulo loMgangatho
Kuyo yonke inkqubo yemveliso, sisebenzisa amanyathelo okulawula umgangatho ukuqinisekisa ukuba iityhubhu ze-silicon carbide ziyahlangabezana nemigangatho efunekayo. Oku kuquka ukuvavanya ubunyulu bezinto ezikrwada, ukujonga ukuhambelana kwenkqubo yokuxuba, kunye nokuhlola ngexesha nasemva kokuyicoca. Iindlela eziphambili ezifana ne-X-ray diffraction kunye ne-scanning electron microscopy zinokusetyenziswa ukuhlalutya isakhiwo se-microstructure ye-silicon carbide ukuqinisekisa ukuba iyahlangabezana nemigangatho yokusebenza efunekayo.
Ukusetyenziswa kweSilicon Carbide Tube
Iityhubhu ze-silicon carbide zisetyenziswa kwiintlobo ngeentlobo zezicelo ngenxa yeempawu zazo ezibalaseleyo. Kwishishini lokucubungula iikhemikhali, zisetyenziselwa ukuhambisa ulwelo oluvuthayo, ngelixa kwicandelo leenqwelo-moya, zisetyenziswa njengezinto kwiindawo ezinobushushu obuphezulu. Ukongeza, iityhubhu ze-silicon carbide zisetyenziswa kakhulu kwizicelo zamandla, ezifana nee-reactors zenyukliya kunye nee-turbines zegesi, apho amandla azo okumelana neemeko ezinzima kakhulu abaluleke kakhulu.
Isishwankathelo
Ukuveliswa kweetyhubhu ze-silicon carbide yinkqubo entsonkothileyo nebuthathaka efuna ingqalelo enzulu kwiinkcukacha kuzo zonke izigaba. Ukususela ekulungisweni kwezinto eziluhlaza ezikumgangatho ophezulu ukuya kulawulo oluchanekileyo lwenkqubo yokusila, inyathelo ngalinye lidlala indima ebalulekileyo kumgangatho kunye nokusebenza kwemveliso yokugqibela. Njengoko amashishini eqhubeka nokufuna izixhobo ezinokumelana neemeko ezinzima, imfuno yeetyhubhu ze-silicon carbide isenokukhula, nto leyo eyenza kubaluleke ngakumbi ukuqonda inkqubo yazo yemveliso. Nokuba zisetyenziselwa usetyenziso lwemizi-mveliso okanye ukusetyenziswa kobuchwepheshe obuphambili, iityhubhu ze-silicon carbide zimele inkqubela phambili enkulu kwisayensi yezinto, zibonelela ngokuqina kunye nokuthembeka kwiindawo ezahlukeneyo.
Ixesha leposi: Matshi-26-2025