Kupanga mphamvu zamagetsi pogwiritsa ntchito dzuwa kwakhala makampani atsopano amphamvu padziko lonse lapansi omwe ali ndi chiyembekezo chachikulu. Poyerekeza ndi ma cell a dzuwa a polysilicon ndi amorphous silicon, monocrystalline silicon, monga chinthu chopangira mphamvu pogwiritsa ntchito kuwala kwa dzuwa, ili ndi mphamvu zambiri zosinthira kuwala kwa dzuwa komanso ubwino wabwino kwambiri wamalonda, ndipo yakhala njira yayikulu yopangira mphamvu zamagetsi pogwiritsa ntchito kuwala kwa dzuwa. Czochralski (CZ) ndi imodzi mwa njira zazikulu zokonzekera monocrystalline silicon. Kapangidwe ka Czochralski monocrystalline ng'anjo imaphatikizapo dongosolo la ng'anjo, dongosolo la vacuum, dongosolo la gasi, dongosolo la thermal field ndi dongosolo lowongolera magetsi. Dongosolo la thermal field ndi chimodzi mwazinthu zofunika kwambiri pakukula kwa monocrystalline silicon, ndipo mtundu wa monocrystalline silicon umakhudzidwa mwachindunji ndi kufalikira kwa kutentha kwa thermal field.
Zigawo za thermal field zimapangidwa makamaka ndi zinthu za carbon (zipangizo za graphite ndi zinthu za carbon/carbon composite), zomwe zimagawidwa m'zigawo zothandizira, zigawo zogwira ntchito, zinthu zotenthetsera, zigawo zoteteza, zinthu zotetezera kutentha, ndi zina zotero, malinga ndi ntchito zawo, monga momwe zasonyezedwera pa Chithunzi 1. Pamene kukula kwa monocrystalline silicon kukupitirira kukula, zofunikira za kukula kwa zigawo za thermal field zikuwonjezekanso. Zipangizo za carbon/carbon composite zimakhala chisankho choyamba cha zipangizo za thermal field za monocrystalline silicon chifukwa cha kukhazikika kwake komanso mawonekedwe ake abwino kwambiri a makina.
Mu ndondomeko ya czochralcian monocrystalline silicon, kusungunuka kwa zinthu za silicon kumapanga nthunzi ya silicon ndi silicon yosungunuka, zomwe zimapangitsa kuti zinthu za carbon/carbon thermal field ziwonongeke, ndipo mphamvu za makina ndi moyo wa ntchito za zinthu za carbon/carbon thermal field zimakhudzidwa kwambiri. Chifukwa chake, momwe mungachepetsere kuwonongeka kwa zinthu za carbon/carbon thermal field ndikukweza moyo wawo wautumiki kwakhala chimodzi mwa nkhawa zomwe anthu ambiri amakumana nazo popanga zinthu za silicon za monocrystalline ndi opanga zinthu za carbon/carbon thermal field.Chophimba cha silicon carbideyakhala chisankho choyamba choteteza pamwamba pa zinthu zotenthetsera mpweya wa carbon/carbon chifukwa cha kukana kwake kutentha kwambiri komanso kukana kutopa.
Mu pepalali, kuyambira pa zipangizo zotenthetsera za kaboni/kaboni zomwe zimagwiritsidwa ntchito popanga silicon ya monocrystalline, njira zazikulu zokonzekera, ubwino ndi kuipa kwa silicon carbide coating zafotokozedwa. Pachifukwa ichi, kugwiritsa ntchito ndi kupita patsogolo kwa kafukufuku wa silicon carbide coating mu zipangizo zotenthetsera za kaboni/kaboni zikuwunikidwa malinga ndi mawonekedwe a zipangizo zotenthetsera za kaboni/kaboni, ndipo malingaliro ndi malangizo okonzekera kuteteza pamwamba pa zipangizo zotenthetsera za kaboni/kaboni akuperekedwa patsogolo.
1 Ukadaulo wokonzekerachophimba cha silicon carbide
1.1 Njira yoyika
Njira yolumikizira nthawi zambiri imagwiritsidwa ntchito pokonzekera chophimba chamkati cha silicon carbide mu dongosolo la zinthu zophatikizika za C/ C-sic. Njirayi imagwiritsa ntchito ufa wosakaniza poyamba kukulunga zinthu zophatikizika za carbon/carbon, kenako imachita chithandizo cha kutentha pa kutentha kwina. Zotsatira zovuta za physico-chemical zimachitika pakati pa ufa wosakaniza ndi pamwamba pa chitsanzo kuti apange chophimbacho. Ubwino wake ndi wakuti njirayi ndi yosavuta, njira imodzi yokha ndiyo ingakonzekere zinthu zophatikizika za matrix zokhuthala, zopanda ming'alu; Kusintha pang'ono kuchokera pa preform kupita ku chinthu chomaliza; Yoyenera kapangidwe kalikonse kolimbikitsidwa ndi ulusi; Gradient inayake ya kapangidwe kake ikhoza kupangidwa pakati pa chophimba ndi substrate, chomwe chimaphatikizidwa bwino ndi substrate. Komabe, palinso zovuta, monga momwe mankhwala amachitira kutentha kwambiri, zomwe zingawononge ulusi, komanso momwe makina a carbon/carbon matrix amachepera. Kufanana kwa chophimbacho n'kovuta kuwongolera, chifukwa cha zinthu monga mphamvu yokoka, zomwe zimapangitsa chophimbacho kukhala chosagwirizana.
1.2 Njira yophikira matope
Njira yophikira matope ndi kusakaniza zinthu zophikira ndi chogwiriracho kukhala chisakanizo, kupukuta mofanana pamwamba pa matrix, mutawumitsa mumlengalenga wopanda madzi, chitsanzo chophimbidwacho chimatenthedwa kutentha kwambiri, ndipo chophimba chofunikira chingapezeke. Ubwino wake ndi wakuti njira imeneyi ndi yosavuta kugwiritsa ntchito, ndipo makulidwe a chophimbacho ndi osavuta kuwongolera; Choyipa chake ndi chakuti pali mphamvu yocheperako yolumikizira pakati pa chophimbacho ndi substrate, ndipo kukana kutentha kwa chophimbacho ndi koipa, ndipo kufanana kwa chophimbacho ndi kochepa.
1.3 Njira yochitira nthunzi ya mankhwala
Njira ya Chemical vapor reaction (CVR) ndi njira yopangira zinthu zomwe zimapangitsa kuti zinthu zolimba za silicon ziume mu nthunzi ya silicon pa kutentha kwina, kenako nthunzi ya silicon imafalikira mkati ndi pamwamba pa matrix, ndipo imachitapo kanthu ndi kaboni mu matrix kuti ipange silicon carbide. Ubwino wake ndi monga mlengalenga wofanana mu ng'anjo, kuchuluka kwa zomwe zimachitika nthawi zonse komanso makulidwe a zinthu zophimbidwa kulikonse; Njirayi ndi yosavuta komanso yosavuta kugwiritsa ntchito, ndipo makulidwe a pulasitiki amatha kulamulidwa posintha kuthamanga kwa nthunzi ya silicon, nthawi yoyika ndi zina. Choyipa chake ndichakuti chitsanzocho chimakhudzidwa kwambiri ndi malo mu ng'anjo, ndipo kuthamanga kwa nthunzi ya silicon mu ng'anjo sikungafikire kufanana kwa chiphunzitso, zomwe zimapangitsa kuti makulidwe a silicon akhale osafanana.
1.4 Njira yosungira nthunzi ya mankhwala
Kuyika mpweya wa mankhwala (CVD) ndi njira yomwe ma hydrocarbon amagwiritsidwa ntchito ngati gwero la mpweya komanso N2/Ar yoyera kwambiri ngati mpweya wonyamula kuti alowetse mpweya wosakanikirana mu chosinthira cha nthunzi cha mankhwala, ndipo ma hydrocarbon amawonongeka, kupangidwa, kufalikira, kulowetsedwa ndikusungunuka pansi pa kutentha ndi kupanikizika kwina kuti apange mafilimu olimba pamwamba pa zinthu zopangidwa ndi kaboni/kaboni. Ubwino wake ndi wakuti kuchuluka ndi kuyera kwa chophimba kumatha kulamulidwa; Ndikoyeneranso kugwiritsidwa ntchito ngati chinthu chogwirira ntchito chokhala ndi mawonekedwe ovuta kwambiri; Kapangidwe ka kristalo ndi mawonekedwe a pamwamba pa chinthucho zitha kulamulidwa posintha magawo oyika. Zoyipa zake ndi zakuti kuchuluka kwa malo oyika ndi kotsika kwambiri, njirayo ndi yovuta, mtengo wopanga ndi wokwera, ndipo pakhoza kukhala zolakwika zoyika, monga ming'alu, zolakwika za maukonde ndi zolakwika za pamwamba.
Mwachidule, njira yolumikizira imangokhala ndi makhalidwe ake aukadaulo, omwe ndi oyenera kupanga ndi kupanga zinthu za labotale ndi zazing'ono; Njira yophimba si yoyenera kupanga zinthu zambiri chifukwa cha kusakhazikika kwake. Njira ya CVR imatha kukwaniritsa kupanga zinthu zazikulu, koma ili ndi zofunikira kwambiri pazida ndi ukadaulo. Njira ya CVD ndi njira yabwino yokonzekeraSIC covering, koma mtengo wake ndi wokwera kuposa njira ya CVR chifukwa cha kuvutika kwake pakuwongolera njira.
Nthawi yotumizira: Feb-22-2024