Uyenza njani imibhobho ye-Silicon Carbide: Isikhokelo esiBanzi

I-Silicon carbide (i-SiC) yinto ekhethiweyo kwiintlobo ezahlukeneyo zezicelo zoshishino ngenxa yobunzima bayo obubalaseleyo, ukuzinza kwe-thermal, kunye nokuchasana kweekhemikhali. Phakathi kweendidi zayo ezininzi, iityhubhu ze-silicon carbide zixabiswa ngokukodwa ngokuhlala kwazo kunye nokusebenza kwiindawo ezinzima. Eli nqaku liza kuhlolisisa inkqubo enzima yokuvelisaiityhubhu ze-silicon carbide, kugxininise kwimveliso ye-reaction-sintered silicon carbide ceramic tubes.

Ukuqonda iSilicon Carbide

Ngaphambi kokuba sihlolisise inkqubo yokuvelisa, kubalulekile ukuqonda ukuba yintoni i-silicon carbide. I-silicon carbide yikhompawundi ye-silicon kunye nekhabhoni eyaziwayo ngeempawu zayo ezikhethekileyo. Yi-semiconductor ekwaziyo ukumelana nobushushu obuphezulu, i-oxidation, kunye nokuhlwa. Ezi zakhiwo zenza iityhubhu ze-silicon carbide zilungele ukusetyenziswa kumashishini afana ne-aerospace, i-automotive, kunye nokulungiswa kweekhemikhali.

Ukulungiswa kwemathiriyeli ekrwada

Inyathelo lokuqala ekwenzeni iityhubhu zesilicon carbide kukulungisa imathiriyeli ekrwada. Umgangatho ophezulu we-silicon powder kunye ne-carbon powder ziyimfuneko yokuvelisa i-high-performance reaction-sintered silicon carbide (RBSC). Ukucoceka kwezi powders kubalulekile; nakuphi na ukungcola kuya kuchaphazela ngokunzulu umgangatho wemveliso yokugqibela. Ukongezelela, ukusabalalisa ubungakanani be-particle ye powders kufuneka ilawulwe ngokucophelela. Ubungakanani obufanayo bamasuntswana buqinisekisa ukuba izinto ziphendula ngokulinganayo ngexesha lenkqubo ye-sintering, okukhokelela kwimveliso exineneyo, eyomeleleyo yokugqibela.

Izithako kunye nokuxuba

Emva kokuba izinto eziluhlaza zilungisiwe, inyathelo elilandelayo lidibanisa kunye nokuxuba. Le nkqubo ibandakanya ukulawula ngokuchanekileyo umlinganiselo we-silicon powder kwi-carbon powder. Umlinganiselo ochanekileyo ubalulekile kuba umisela ukusabela kweekhemikhali eziya kwenzeka ngexesha lokutshisa. Ukuxuba ngokucokisekileyo iipowders ukuqinisekisa ukuba ukusabalalisa ngokulinganayo kubalulekile ukufezekisa ukwakheka kwe-silicon carbide. Eli nyathelo libalulekile; nakuphi na ukungahambelani kumxube kunokubangela iziphene kwityhubhu yokugqibela ye-silicon carbide.

Ukwenza imilo yombhobho

Emva kokuba inkqubo yokudibanisa kunye nokuxuba igqityiwe, isinyathelo esilandelayo kukubumba umbhobho. Oku kunokufezekiswa ngeendlela ezahlukeneyo, kubandakanywa ukucinezela kwe-isostatic ebandayo (CIP) okanye i-extrusion. I-CIP ibandakanya ukusetyenziswa kwengcinezelo efanayo kwi-powder edibeneyo kwi-die, ebangela ukuba i-compact and shaped shaped shape. Ngaphandle koko, i-extrusion ivumela ukubunjwa ngokuqhubekayo kwezinto eziphathekayo, eziluncedo ngokukodwa ekuveliseni imibhobho emide. Ukukhethwa kwendlela yokubumba kuxhomekeke kubukhulu obufunwayo kunye neenkcukacha zemveliso yokugqibela.

Inkqubo yeSintering

Inkqubo sintering kulapho umlingo kwenzeka. Ityhubhu ye-silicon carbide eyenziweyo ifakwe kwiziko lobushushu obuphezulu kunye nesantya esilawulwa ngokungqongqo sokufudumeza kunye nexesha lokubamba. Ngeli nqanaba, i-silicon powder kunye ne-carbon powder zisabela ngokwekhemikhali ukuze zenze isakhiwo esixineneyo se-silicon carbide. Ubushushu be-sintering ngokuqhelekileyo buphakathi kwe-1400 ° C kunye ne-2000 ° C, kuxhomekeke kuqulunqo oluthile kunye neempawu ezifunwayo zemveliso yokugqibela. Eli nyathelo libalulekile kuba limisela amandla oomatshini kunye nokuzinza kwe-thermal ye-silicon carbide tube.

Itekhnoloji ye-post-processing

Emva kokuba inkqubo ye-sintering igqityiwe, ityhubhu ye-silicon carbide idlula kwi-post-processing. Eli nqanaba libandakanya ukwenziwa ngomatshini kunye nokugudiswa komphezulu ukuhlangabezana neemfuno ezichanekileyo zomgangatho kunye nomgangatho womphezulu. Ukutshiza kunokubandakanya ukusika, ukugaya okanye ukugaya ukuze kufezekiswe imilinganiselo efunekayo, ngelixa ukucolwa komphezulu kuphucula i-aesthetics kunye nokusebenza komsebenzi wombhobho. I-post-processing ibalulekile ukuqinisekisa ukuba imveliso yokugqibela ihlangabezana nemigangatho yoshishino kunye neenkcukacha zabathengi.

Imilinganiselo yoLawulo loMgangatho

Kuyo yonke inkqubo yokuvelisa, sisebenzisa imilinganiselo yokulawula umgangatho wokuqinisekisa ukuba iityhubhu ze-silicon carbide zihlangabezana nemigangatho efunekayo. Oku kubandakanya ukuvavanya ukucoceka kwezinto eziluhlaza, ukubeka esweni ukuhambelana kwenkqubo yokuxuba, kunye nokuhlola ngexesha kunye nangemva kokuhlamba. Ubuchule obuphezulu obufana ne-X-ray diffraction kunye ne-electron microscopy yokuskena ingasetyenziselwa ukuhlalutya i-microstructure ye-silicon carbide ukuqinisekisa ukuba ihlangabezana nemigangatho yokusebenza efunekayo.

Ukusetyenziswa kweSilicon Carbide Tube

Iityhubhu ze-silicon ze-carbide zisetyenziselwa uluhlu olubanzi lwezicelo ngenxa yeempawu zabo ezintle. Kwishishini lokucutshungulwa kweekhemikhali, zisetyenziselwa ukuhambisa ulwelo olonakalisayo, ngelixa kwicandelo le-aerospace, zisetyenziswa njengamacandelo kwindawo yobushushu obuphezulu. Ukongeza, iityhubhu ze-silicon carbide zisetyenziswa kakhulu kwizicelo zamandla, njengezixhobo zenyukliya kunye nee turbines zegesi, apho amandla abo okumelana neemeko ezinzima kakhulu.

Isishwankathelo

Ukuveliswa kweetyhubhu ze-silicon carbide yinkqubo entsonkothileyo kunye nethambileyo efuna uqwalaselo olucokisekileyo kwiinkcukacha kwinqanaba ngalinye. Ukususela ekulungiseleleni izinto ezisemgangathweni ophezulu ukuya kulawulo oluchanekileyo lwenkqubo ye-sintering, inyathelo ngalinye lidlala indima ebalulekileyo kumgangatho kunye nokusebenza kwemveliso yokugqibela. Njengoko amashishini eqhubeka efuna izinto ezinokumelana neemeko ezinzima, imfuno ye-silicon carbide tubes inokukhula, okwenza kubaluleke ngakumbi ukuqonda inkqubo yabo yokuvelisa. Nokuba isetyenziselwa usetyenziso lweshishini okanye ukusetyenziswa kwetekhnoloji ephezulu, iityhubhu ze-silicon carbide zibonisa ukuqhubela phambili kwisayensi yezinto, ukubonelela ngokuzinzileyo kunye nokuthembeka kwiindawo ezahlukeneyo.