Silicon carbide (SiC) ndi chinthu chomwe mungasankhe pamafakitale osiyanasiyana chifukwa cha kuuma kwake, kukhazikika kwamafuta, komanso kukana kwamankhwala. Mwa mitundu yake yambiri, machubu a silicon carbide ndiwofunika kwambiri chifukwa chokhalitsa komanso kugwira ntchito m'malo ovuta. Nkhaniyi ifotokoza zovuta zopanga zinthumachubu a silicon carbide, kuyang'ana pa kupanga reaction-sintered silicon carbide ceramic machubu.
Kumvetsetsa Silicon Carbide
Tisanayang'ane pakupanga, ndikofunikira kumvetsetsa kuti silicon carbide ndi chiyani. Silicon carbide ndi gulu la silicon ndi kaboni lomwe limadziwika ndi zinthu zake zapadera. Ndi semiconductor yomwe imalimbana ndi kutentha kwambiri, makutidwe ndi okosijeni, komanso dzimbiri. Izi zimapangitsa machubu a silicon carbide kukhala abwino kuti agwiritsidwe ntchito m'mafakitale monga zakuthambo, magalimoto, ndi kukonza mankhwala.
Kukonzekera kwa zipangizo
Gawo loyamba popanga machubu a silicon carbide ndikukonzekera zopangira. Ufa wapamwamba wa silicon ndi ufa wa kaboni ndizofunikira kuti apange mawonekedwe apamwamba-sintered silicon carbide (RBSC). Kuyeretsedwa kwa ufawu ndikofunika kwambiri; zonyansa zilizonse zidzakhudza kwambiri ubwino wa mankhwala omaliza. Komanso, tinthu kukula kugawa ufa ayenera mosamala ankalamulira. Kukula kwa tinthu ting'onoting'ono kumatsimikizira kuti zinthuzo zimagwira ntchito mofanana panthawi ya sintering, zomwe zimapangitsa kuti pakhale chinthu cholimba, chomaliza.
Zosakaniza ndi Kusakaniza
Zopangira zikakonzedwa, sitepe yotsatira ndiyo batching ndi kusakaniza. Izi zimaphatikizapo kuwongolera ndendende chiŵerengero cha ufa wa silicon ndi ufa wa carbon. Chiŵerengero cholondola ndi chofunikira chifukwa chimatsimikizira momwe mankhwala omwe adzachitika panthawi ya sintering. Kusakaniza bwino ufa kuti muwonetsetse kuti kugawa kuli kofunika kuti mukwaniritse mapangidwe a silicon carbide. Sitepe iyi ndi yovuta; kusagwirizana kulikonse mu osakaniza kungayambitse zolakwika mu chubu chomaliza cha silicon carbide.
Kupanga mawonekedwe a chitoliro
Pamene batching ndi kusakaniza ndondomeko yatha, sitepe yotsatira ndi kupanga chitoliro. Izi zitha kuchitika kudzera munjira zosiyanasiyana, kuphatikiza kuzizira kwa isostatic (CIP) kapena extrusion. CIP imaphatikizapo kugwiritsa ntchito kukakamiza kofanana ku ufa wosakanizidwa mu kufa, zomwe zimapangitsa kuti pakhale mawonekedwe osakanikirana komanso opangidwa bwino. Kapenanso, extrusion imalola kupangidwa kosalekeza kwa zinthu, zomwe zimakhala zothandiza makamaka popanga mapaipi aatali. Kusankhidwa kwa njira yopangira mapangidwe kumadalira kukula kwake komwe kumafunidwa ndi kutchulidwa kwa chinthu chomaliza.
Sintering ndondomeko
The sintering ndondomeko ndi pamene matsenga zimachitika. Chubu chopangidwa ndi silicon carbide chimayikidwa mu ng'anjo yotentha kwambiri yokhala ndi liwiro lotentha komanso nthawi yogwira. Panthawi imeneyi, ufa wa silicon ndi ufa wa kaboni umachita zinthu mwamankhwala kuti upangike wandiweyani wa silicon carbide. Kutentha kwa sintering nthawi zambiri kumakhala pakati pa 1400 ° C ndi 2000 ° C, kutengera kapangidwe kake ndi katundu wofunidwa wa chinthu chomaliza. Gawo ili ndilofunika chifukwa limatsimikizira mphamvu zamakina ndi kukhazikika kwamafuta a silicon carbide chubu.
Tekinoloje ya post-processing
Pambuyo pomaliza, chubu cha silicon carbide chimachitika pambuyo pokonza. Gawoli limaphatikizapo kupukuta ndi kupukuta pamwamba kuti zikwaniritse zofunikira zenizeni komanso zapamwamba. Kucheka kungaphatikizepo kudula, kupera kapena kubowola kuti mukwaniritse miyeso yofunikira, pomwe kupukuta pamwamba kumawonjezera kukongola ndi magwiridwe antchito a chubu. Kukonza pambuyo ndikofunikira kuwonetsetsa kuti chomaliza chikukwaniritsa miyezo yamakampani komanso zomwe makasitomala amafuna.
Njira Zowongolera Ubwino
Panthawi yonse yopanga, timagwiritsa ntchito njira zowongolera kuti tiwonetsetse kuti machubu a silicon carbide akukwaniritsa zofunikira. Izi zikuphatikizapo kuyesa chiyero cha zipangizo, kuyang'anira kusasinthasintha kwa njira yosakaniza, ndikuyang'ana panthawi ndi pambuyo pa sintering. Njira zamakono monga X-ray diffraction ndi scanning electron microscopy ingagwiritsidwe ntchito kusanthula microstructure ya silicon carbide kuonetsetsa kuti ikukwaniritsa zofunikira zogwirira ntchito.
Kugwiritsa ntchito Silicon Carbide Tube
Machubu a silicon carbide amagwiritsidwa ntchito mosiyanasiyana chifukwa cha zabwino zake. M'makampani opanga mankhwala, amagwiritsidwa ntchito potumiza madzi owononga, pomwe m'gawo lazamlengalenga, amagwiritsidwa ntchito ngati zigawo m'malo otentha kwambiri. Kuphatikiza apo, machubu a silicon carbide amagwiritsidwa ntchito kwambiri pamagetsi, monga ma reactor a nyukiliya ndi ma turbines a gasi, pomwe kuthekera kwawo kolimbana ndi mikhalidwe yoyipa kumakhala kofunikira.
Powombetsa mkota
Kupanga machubu a silicon carbide ndi njira yovuta komanso yovuta yomwe imafuna kusamalitsa mwatsatanetsatane pagawo lililonse. Kuchokera pakukonzekera zipangizo zapamwamba kwambiri mpaka kuwongolera bwino kwa sintering, sitepe iliyonse imakhala ndi gawo lofunika kwambiri pa khalidwe ndi ntchito ya mankhwala omaliza. Pamene mafakitale akupitiriza kufunafuna zipangizo zomwe zingathe kupirira mikhalidwe yovuta, kufunikira kwa machubu a silicon carbide kuyenera kukula, zomwe zimapangitsa kuti zikhale zofunikira kwambiri kumvetsetsa momwe amapangira. Kaya amagwiritsidwa ntchito m'mafakitale kapena ntchito zapamwamba zaukadaulo, machubu a silicon carbide akuyimira kupita patsogolo kwa sayansi yazinthu, kupereka kulimba komanso kudalirika m'malo osiyanasiyana.
Nthawi yotumiza: Mar-26-2025