I-Silicon Carbide Ceramic: Esona sixhobo sigqibeleleyo sosetyenziso olugqithisileyo
Silicon carbide ceramic, ihlala ibizwa ngokuba yi-SiC ceramic, sisixhobo esimangalisayo esithe saguqula amashishini ahlukeneyo ngenxa yeempawu zawo ezikhethekileyo zomzimba kunye neekhemikhali. Idityaniswe ngesilicon kunye neeathom zekhabhoni ezidityaniswe kunye ukuze zenze ulwakhiwo olulodwa lwekristale, I-ceramic ye-SiC ibonisa ubunzima obuphezulu, ogqwesileyo thermal conductivity, kunye nokuzinza okuphezulu kweekhemikhali.
I-ceramic ye-SiC iveliswa ngenkqubo ebizwa ngokuba yi-sintering, apho i-silicon carbide engumgubo idityanisiwe kwaye ifudunyezwe kumaqondo obushushu aphezulu, ukwenza ixinene, izinto ze-ceramic ezinamandla. Le ndlela yokuvelisa ivumela ulawulo oluchanekileyo kwi-microstructure yezinto eziphathekayo, isiphumo kwimveliso eyenzelwe usetyenziso oluthile.
Enye yeempawu eziphawulekayo ze-SiC ceramic bubunzima bayo. Nge-mohs hardtrance yenqanaba le 9.5 (ngaphandle kwe 10), sesinye sezona zixhobo zinzima ezaziwayo ngumntu. Obu bunzima benza ukuba i-SiC ceramic ibe yinto efanelekileyo yokusetyenziswa kwiindawo ezinqabileyo, apho ezinye izinto zazinokuphela ngokukhawuleza. Ukongeza, i-conductivity ephezulu ye-thermal ivumela ukuba ikhuphe ubushushu ngokufanelekileyo, ukuyenza ilungele izicelo zobushushu obuphezulu.
I-ceramic ye-SiC nayo ibonisa ukuzinza kweekhemikhali okugqwesileyo, ukumelana nokubola kwi-asidi, iialkali, kunye nezinye izinto ezonakalisayo. Le propati iyenza ibe yinto efanelekileyo yokusetyenziswa kwiindawo ezinobundlongo bekhemikhali, ezifana nezityalo zokulungisa iikhemikhali okanye iindawo zokucokisa i-oyile negesi.
Indibaniselwano ekhethekileyo yobulukhuni, conductivity thermal, kunye nezikhundla zokuzinza kweekhemikhali ze-SiC ceramic njengento ehamba phambili kumashishini ahlukeneyo. Kwishishini leemoto, I-ceramic ye-SiC isetyenziselwa ii-brake pads kunye ne-clutches ngenxa yokukwazi ukumelana nokushisa okuphezulu kunye nokuxhathisa ukunxiba. Kwishishini le-elektroniki, isetyenziswa njengenxalenye encinci yezixhobo zombane zamandla aphezulu, ngokufanelekileyo ukukhupha ubushushu ukugcina ukusebenza kakuhle.
Ngaphezulu, I-Ceramic ye-SiC idlala indima ebalulekileyo kwi-aerospace kunye nezicelo zokukhusela. Indalo yayo ekhaphukhaphu kodwa yomelele iyenza ibe sisixhobo esigqwesileyo sokukhusela izixhobo ezibuthathaka kunye namalungu olwakhiwo kubushushu obugqithisileyo kunye neemeko ezirhabaxa.. Ikwasetyenziswa kumacandelo esathelayithi kunye neziphekepheke, apho ukuxhathisa kwayo kwimitha kunye nokothuka kwe-thermal kubalulekile.
Ishishini lezonyango liye laxhamla ekusebenziseni i-SiC ceramic. I-biocompatibility yayo kunye nokuzinza kweekhemikhali kwenza ukuba ilungele ukusetyenziswa kwizixhobo zokufakelwa kunye nezixhobo zotyando. Ukongeza, ukuqina kwayo kunye nokumelana nokunxiba kwandisa ukuqina kunye nobomi obude bezixhobo zonyango.
Nangona iimpawu zayo ezimangalisayo, I-SiC ceramic inemida ethile. Ukuba brittleness kwayo kwenza ukuba kube lula ukuphuka phantsi kweempembelelo eziphezulu. Ngoko ke, Uqwalaselo olululo kufuneka lunikwe kwisicelo esithile kunye neemeko zokusebenza xa ukhetha i-SiC ceramic yokusetyenziswa.
Uphando oluqhubekayo kunye neenzame zophuhliso ziyaqhubeka nokutyhala imida yezakhono ze-SiC ceramic. Oosonzululwazi kunye neenjineli baphonononga iindlela ezintsha zokuvelisa, njengemveliso eyongezelelweyo, ukudala iimilo ezintsonkothileyo kunye nezakhiwo ebezingenakufikelelwa ngaphambili. Olu phuculo luvula amathuba amatsha eSiC ceramic kumashishini ahlukeneyo, kuquka amandla, i-aerospace, kunye ne-biomedicine.
Ukuququmbela, I-silicon carbide ceramic sisixhobo esimangalisayo esibonelela ngeenzuzo ezizodwa kwizicelo ezigqithisileyo. Ukuqina kwayo, conductivity thermal, kunye nokuzinza kweekhemikhali kuyenza ibe yimathiriyeli exabiseke kakhulu kumashishini ukusuka kwiimoto ukuya kwi-aerospace. Njengoko uphando kunye nobuchwepheshe buqhubeka nokuguquka, usetyenziso olunokubakho lwe-SiC ceramic alunamda, ivula indlela yosetyenziso oluyilayo ngakumbi kwixesha elizayo.
Lo mxholo ungasentla unika umbono jikelele we-silicon carbide ceramic, iqaqambisa iimpawu zayo eziphambili, izicelo, kunye nemida. Nangona kunjalo, kuninzi okunokuphononongwa ngalo mbandela ubangel’ umdla. Makhe singene nzulu kwiinkcukacha zeSiC ceramic, kuquka nenkqubo yokwenziwa kwayo, unyango olungaphezulu, kunye nezicelo eziphambili.
Inkqubo yokuVelisa
I-SiC ceramic idla ngokuveliswa ngenkqubo yomgubo wesinyithi. Oku kubandakanya ukuxuba umgubo ocolekileyo wesilicon carbide kunye nesibophelelo, ukudibanisa umxube kwisimo esifunwayo, kwaye emva koko sintering (ukufudumeza) it kumaqondo obushushu aphezulu ukudibanisa amasuntswana empuphu ibe dense, umzimba oqinileyo weceramic.
Inkqubo ye-sintering ibalulekile, njengoko imisela iimpawu zokugqibela ze-ceramic. Ubushushu, uxinzelelo, kunye ne-atmosphere ngexesha le-sintering inokuchaphazela kakhulu i-microstructure, ukuxinana, kunye neempawu zomatshini wezinto ezibangelwayo. Abavelisi balawula ngononophelo ezi parameters ukulungisa i-ceramic ye-SiC kwizicelo ezithile.
Unyango loMphezulu
Ukuphucula ukusebenza kwe-SiC ceramic kwizicelo ezithile, iindlela ezahlukeneyo zonyango ezingaphezulu zinokusetyenziswa. Umzekelo, ukugquma i-ceramic kunye nomgca omncinci wenye into kunokuphucula ukuxhathisa kwayo, ukunciphisa ukungqubana, okanye uphucule ukuhanjiswa kombane.
Olunye unyango oluqhelekileyo oluqhelekileyo kukusetyenziswa kwengubo yokukhusela, njengekhabhoni efana nedayimani (I-DLC) ukutyabeka. Iingubo ze-DLC zinzima kakhulu kwaye zinokwandisa kakhulu ukuxhathisa ukunxiba kunye nokuqina kwezinto ze-SiC ceramic.
Izicelo zokusika
Iipropathi ezizodwa ze-SiC ceramic zikhokelele ekwamkelweni kwayo kwezinye izicelo zokusika. Umzekelo, kwintsimi yamandla avuselelekayo, I-ceramic ye-SiC isetyenziselwa ukuveliswa kweeseli zelanga. I-conductivity ephezulu ye-thermal kunye nokuzinza kweekhemikhali kwenza kube yinto efanelekileyo kwi-substrates ye-solar cell, ngokufanelekileyo ukukhupha ubushushu kunye nokuxhathisa ukubola kwimiba yokusingqongileyo.
Kwishishini leemoto, I-ceramic ye-SiC isanda kusetyenziswa kwisithuthi sombane (EV) amacandelo. I-conductivity yayo ephezulu ye-thermal kunye ne-resistivity yombane yenza ukuba ilungele ukusetyenziswa kumbane wamandla, njengee-inverters kunye nabaguquli, apho ukususwa kobushushu okufanelekileyo kubalulekile.
Ukongeza, I-Ceramic ye-SiC ifumana izicelo kwizinto ezifakwe kwi-biomedical kunye nezixhobo. I-biocompatibility yayo, ubulukhuni, kunye nokumelana nokunxiba kuyenza ibe yimpahla egqwesileyo kumalungu okwenziwa, ukufakelwa kwamazinyo, kunye nezixhobo zotyando.
Amathemba ekamva
Ikamva le-SiC ceramic libukeka liqaqambile, ngophando oluqhubekayo kunye neenzame zophuhliso ezigxile ekwandiseni iipropati zayo kunye nokwandisa uluhlu lwayo lwezicelo. Iindlela ezintsha zokuvelisa, njengemveliso eyongezelelweyo (3D yoshicilelo), unikeze amandla okudala izakhiwo ze-ceramic eziyinkimbinkimbi ze-SiC ezineempawu ezilungiselelwe.
Ngaphezulu, ukudityaniswa kwe-SiC ceramic kunye nezinye izinto eziphambili, njenge-carbon nanotubes okanye igraphene, kunokukhokelela kuphuhliso lweenoveli ezidityanisiweyo ngoomatshini abaphuculweyo, thermal, kunye neempawu zombane. Ezi ntlanganisela zinokuguqula amashishini ahlukeneyo, kuquka i-aerospace, amandla, kunye ne-biomedicine.
Ukuququmbela, I-silicon carbide ceramic sisixhobo esimangalisayo esiqhubeka nokufumana usetyenziso olutsha kuwo wonke amashishini awohlukeneyo. Indibaniselwano yayo ekhethekileyo yobulukhuni, conductivity thermal, kunye nokuzinza kweekhemikhali kwenza kube sisixhobo esixabisekileyo kwiindawo eziphakamileyo. Ngophando oluqhubekayo kunye nokuqhubela phambili kwezobuchwepheshe, amandla e-SiC ceramic ayinamda, ivula indlela yosetyenziso oluyilayo ngakumbi kwixesha elizayo.