Ina pā te paru paru o te maina ki te paipa i te tere tere, ina haere tonu te para pāmahana teitei i roto i te awheawhe whakarewa ki te horoi i te pakitara o roto, ā, ina waikura te pakitara paipa i ia rā, i ia rā e te otinga waikawa kaha i roto i te awheawhe matū – he maha ngā turuturu o ngā paipa whakarewa noa i muri i ētahi marama noa iho. Engari he momo paipa ka taea te ora i roto i tētahi "whakakorenga ahumahi" pēnei me te kore e whara, ā, hepaipa ātete-kakahu i hangaia ki te silicon carbidehei rauemi matua. He aha te momo mātauranga rauemi e hunaia ana e tēnei wāhanga ahumahi noa iho?
He waehere rauemi uaua ake i te maitai
I tīmata te kōrero mō te silicon carbide i te mutunga o te rautau 19 i te kitenga tūpono a ngā kaipūtaiao i tēnei matū mārō i a rātou e ngana ana ki te hanga taimana hangai. He tino onge i te taiao, ā, e mōhiotia ana ko te "Moissanite", ko te silicon carbide e whakamahia ana i roto i te ahumahi i ēnei rā he hua hangai katoa.
Ko te mea ngaro ki te hanga i ngā paipa silicon carbide kia "ātete ki te hanga" kei roto i tōna hanganga moroiti ahurei. I raro i te karu hiko, ka whakaatuhia e ngā tioata silicon carbide he hanganga tetrahedral e rite ana ki te taimana, me ia ngota silicon e karapotia ana e ngā ngota waro e whā, e hanga ana i tētahi whatunga hononga covalent kore e taea te whati. Mā tēnei hanganga ka tuaruatia tōna pakeke ki te taimana, me te pakeke Mohs o te 9.5, ko te tikanga he uaua ki te waiho tohu ahakoa te mimiti tonu o te onepu quartz (te pakeke Mohs o te 7).
Ko te mea tino onge ko te pakeke o te silicon carbide, engari he tino ātete hoki ki ngā pāmahana teitei. I te pāmahana teitei o te 1400 ℃, ka taea tonu e ia te pupuri i ngā āhuatanga miihini pumau, e pai ai tana mahi i roto i ngā āhuatanga pāmahana teitei pēnei i te kawe paura waro i roto i ngā oumu whakarewa maitai me te tukunga para o te kohua i roto i te whakaputa hiko wera. I taua wā anō, he "ātete" ki te mimiti o te nuinga o ngā waikawa me ngā kawakore, ā, he mea tino nui tēnei ātete waikura i roto i ngā paipa tuku waikawa kaha i roto i te umanga matū.
Te rapunga whakaaro hoahoa hei whakanui ake i te roa o te ora o ngā paipa kia tekau ngā wā
Kāore e ranea te mārō noa hei aro atu ki ngā taiao ahumahi uaua. Ko ngā paipa ātete-kapia silicon hou e whakamahi ana i ngā hanganga hiato atamai ake: ko te paparanga o waho he maitai waro noa e tautoko ana i te hanganga, ko te paparanga o roto he arai uku silicon carbide, ā, ko ētahi paipa he takai muka karāhe ki waho hei whakarei ake i te kaha whānui. Ehara i te mea ka whakamahia noa e tēnei hoahoa te painga ātete-kapia o te silicon carbide, engari ka whakaea hoki te pakarukaru o ngā rauemi uku.
Ka whakahaerehia hoki e ngā miihini te "hoahoa rerekē" i runga i te nui o te pakaru o ngā wāhanga rerekē o te paipa. Hei tauira, mēnā ko te pewa o waho o te tuke te mea tino pakaru, ka whakamahia he arai silicon carbide matotoru ake; mēnā he māmā noa te pakaru o te pewa o roto, me whakaangai tika kia mau tonu ai te pakari me te karo i te maumau rauemi.
Mā te whakamahi i te hangarau sintering tauhohenga ka tino pai ake ngā paipa silicon carbide. Mā te whakahaere tika i te pāmahana me te ōwehenga rauemi mata, ka taea e te rauemi te whakatutuki i te āhua matotoru me te tata kore porosity, me te whakauru i ngā wāhanga karāpeti hei hanga i tētahi paparanga whakahinuhinu-ake. Ina horoia te paipa e te wai, ka hangaia e te paparanga karāpeti he kiriata tiaki, ka whakaiti ake i te tauwehenga waku, pērā i te whakatakoto i tētahi "pūeru whakahinuhinu" ki runga i te paipa.
Mai i te whakapapa ā-umanga ki te heke mai matomato
I roto i ngā ahumahi taumaha pērā i te hiko wera, te keri, te whakarewa, me te miihini matū, he rite ngā pūnaha paipa ki te "ira toto ahumahi", ā, he hononga tika tō rātou pono ki te haumaru me te whai huatanga o te whakaputanga. He maha ngā wā me whakakapi ngā paipa whakarewa tuku iho i roto i ngā marama e 3 i roto i ngā taiao pakaru kaha, ā, ka taea te whakaroa ake i te roa o te ora o ngā paipa ātete-kakahu silicon carbide neke atu i te 10 ngā wā, ka tino whakaiti i te auau o te tiaki wā-kore.
He nui hoki ngā painga mō te taiao e puta mai ana i tēnei āhuatanga pumau. Ko te whakaiti i te whakakapinga o ngā paipa he whakaiti i te whakamahinga o te maitai, ā, ka taea e ngā hangarau whakarewa matatau e whakamahia ana i roto i te tukanga whakaputa (pēnei i te tikanga ESK) te whakaora i te hau para mō te whakaputa hiko, ka whakapiki ake i te whakamahinga pūngao mā te 20%. I roto i ngā mara hou pēnei i te hanga pākahiko lithium me ngā taputapu tiaki taiao, he mea nui anō hoki te ātete waikura me te ātete kakahu o ngā paipa silicon carbide.
Ina kōrero tātou mō te ahunga whakamua o te ahumahi, he maha ngā wā ka aro tātou ki aua hua hangarau teitei whakamiharo, engari ka wareware noa i ngā "toa kei muri i te tirohanga" pērā i ngā paipa ātete-kakahu silicon carbide. Koinei tonu te auahatanga e whakanui ana i ngā āhuatanga o ngā rauemi taketake e tautoko ana i te mahi whai hua o te ahumahi hou. Mai i ngā maina ki ngā wheketere, mai i ngā oumu pāmahana teitei ki ngā awheawhe matū, kei te whai wāhi atu ēnei 'whakamarumaru pakari' puku ki te haumaru me te pumau o te whakaputa ahumahi i roto i tā rātou ake huarahi.
Wā tuku: Hurae-30-2025