Ngā uku hākawa silicon (SiC)kua noho hei rauemi matua i roto i te mara o ngā uku hanganga pāmahana-tiketike nā te iti o te tauwehenga whānui wera, te kawe wera teitei, te pakeke teitei, me te pumau wera me te matū pai rawa atu. He whānuitia te whakamahinga i roto i ngā mara matua pēnei i te rererangi, te pūngao karihi, te ope taua, me ngā haurua-ira.
Heoi, nā te kaha rawa o ngā hononga honohono me te iti o te tauwehenga horapa o te SiC ka uaua ai tōna whakakīkī. Hei whakatutuki i tēnei, kua whakawhanakehia e te umanga ngā hangarau sintering maha, ā, he rerekētanga nui ngā uku SiC i whakaritea mā roto i ngā hangarau rerekē i roto i te hanganga moroiti, ngā āhuatanga, me ngā horopaki tono. Anei tētahi tātaritanga o ngā āhuatanga matua o ngā uku silicon carbide matua e rima.
1. Ngā uku SiC kore-pēhanga (S-SiC)
Ngā painga matua: He pai mō ngā tukanga whakahāngai maha, he iti te utu, kāore e herea e te āhua me te rahi, koinei te tikanga whakahāngai māmā rawa atu hei whakatutuki i te whakaputanga papatipu. Mā te tāpiri i te boron me te waro ki te β – SiC kei roto he iti noa te hāora, me te whakahāngai i raro i te hau kore mahi i te 2000 ℃, ka taea te whiwhi i tētahi tinana whakahāngai me te mātotoru ariā o te 98%. E rua ngā tukanga: te wāhanga totoka me te wāhanga wai. He nui ake te mātotoru me te parakore o te mea tuatahi, me te kawe wera nui me te kaha pāmahana teitei.
Ngā tono noa: Te hanga papatipu o ngā mowhiti hiri me ngā peera reti e ātete ana ki te kakahu me te waikura; Nā te pakeke nui, te iti o te taumaha motuhake, me te pai o te mahi porotiti, e whakamahia whānuitia ana hei pukupuku ātete matā mō ngā waka me ngā kaipuke, tae atu ki te tiaki i ngā pouaka haumaru ā-iwi me ngā waka kawe moni. He pai ake tōna ātete maha-pānga i ngā uku SiC noa, ā, ka taea e te pūwāhi whati o te pukupuku tiaki porotaka mama te neke atu i te 65 tana.
2. Ngā uku SiC kua whakakāhia te tauhohenga (RB SiC)
Ngā painga matua: He tino pai te mahi ā-mīhini, he kaha teitei, he ātete ki te waikura, me te ātete ki te waikura; He iti te pāmahana me te utu o te whakapūkara, ka taea te hanga tata ki te rahi kupenga. Ko te tukanga he whakaranu i te pūtake waro me te paura SiC hei hanga i te pereki. I ngā pāmahana teitei, ka uru te silicon rewa ki roto i te pereki ka tauhohe ki te waro hei hanga β – SiC, ka honoa ki te α – SiC taketake ka whakakī i ngā pūwero. He iti te huringa rahi i te wā o te whakapūkara, he pai mō te hanga ahumahi o ngā hua āhua uaua.
Ngā whakamahinga noa: Ngā taputapu oumu pāmahana teitei, ngā ngongo hihi, ngā whakawhiti wera, ngā pūwero whakakore pūhā; Nā te iti o te tauwehenga whānui wera, te teitei o te modulus elastic, me ngā āhuatanga tata ki te hanga kupenga, kua waiho hei rauemi pai mō ngā whakaata ātea; Ka taea hoki e ia te whakakapi i te karāhe quartz hei taputapu tautoko mō ngā ngongo hiko me ngā taputapu hanga maramara haurua-ira.
3. Ngā uku SiC kua pēhia wera (HP SiC)
Painga matua: Mā te whakamahi i te sintering tukutahi i raro i te pāmahana teitei me te pēhanga teitei, kei roto te paura i te āhua thermoplastic, e pai ai te whakawhiti papatipu. Ka taea e ia te whakaputa hua me ngā kirikiri angiangi, te kiato teitei, me ngā āhuatanga miihini pai i ngā pāmahana iti ake me te wā poto ake, ā, ka taea te whakatutuki i te kiato katoa me te āhua sintering tata parakore.
Te whakamahinga noa: I whakamahia tuatahitia hei koti ātete matā mō ngā mema o te kapa hērakapa o Amerika i te Pakanga o Vietnam, i whakakapia te mākete pukupuku e te boron carbide wera; I tēnei wā, e whakamahia ana i roto i ngā āhuatanga uara-tāpiri teitei, pērā i ngā mara he tino nui ngā whakaritenga mō te whakahaere hanganga, te parakore, me te whakakīkī, tae atu ki ngā mara ātete-kakahu me ngā mara ahumahi karihi.
4. Ngā uku SiC kua whakakōwhaitia anō (R-SiC)
Painga matua: Kāore he take ki te tāpiri i ngā āwhina whakatā, he tikanga noa tēnei mō te whakarite i ngā taputapu SiC tino parakore me ngā taputapu SiC nui. Ko te tukanga he whakaranu i ngā paura SiC matotoru me ngā paura SiC pai kia rite te ōwehenga, ka hangaia, ka whakatā i roto i te hau kore mahi i te 2200~2450 ℃. Ka mimiti, ka whakawhāiti ngā matūriki pai i te pa o ngā matūriki matotoru hei hanga uku, he pakeke ake i te taimana. Ka mau tonu te kaha pāmahana teitei o te SiC, te ātete ki te waikura, te ātete ki te waikura, me te ātete ki te ru wera.
Ngā tono noa: Ngā taonga oumu pāmahana teitei, ngā whakawhiti wera, ngā pūwero mura; I roto i ngā mara rererangi me te ope taua, ka whakamahia hei hanga i ngā wāhanga hanganga o te waka mokowhiti pērā i ngā miihini, ngā tara hiku, me te tinana o te waka, ka taea te whakapai ake i te mahi a ngā taputapu me te roa o te ratonga.
5. Ngā uku SiC kua whakakōpirihia ki te silicon (SiSiC)
Ngā Painga Matua: He tino pai mō te hanga ahumahi, he poto te wā whakapūtanga, he iti te pāmahana, he tino matotoru, kāore e whakapōturi, he mea tito mai i te anga SiC me te wāhanga Si kua whakapūtangahia, e rua ngā tukanga: te whakapūtanga wai me te whakapūtanga hau. He nui ake te utu o tēnei engari he pai ake te matotoru me te ōrite o te silicon kore utu.
Ngā tono noa: he iti te porowhita, he pai te ātete hau, me te iti o te ātete e āwhina ana ki te whakakore i te hiko pateko, he pai mō te whakaputa i ngā wāhanga nunui, uaua, tuwhera rānei, e whakamahia whānuitia ana i roto i ngā taputapu tukatuka haurua-ira; Nā te mea he teitei te ngāwari o te whakaurunga, he mama, he kaha teitei, me te pai o te ātete hau, koinei te rauemi mahi-teitei e pai ana ki te ao rererangi, ka taea te tu atu i ngā kawenga i roto i ngā taiao ātea, ā, ka whakarite i te tika me te haumaru o ngā taputapu.
Wā tuku: Hepetema-02-2025