Ukume alumina ātete-mauHe rauemi uku ahumahi matatau tēnei, he mea hanga tuatahi ki te alumina parakore teitei (Al₂O₃). Kua noho hei rauemi matua mō te whakatika i ngā āhuatanga pakaru kino, te waikura, me te pāmahana tiketike nā te mea he tino pakeke, he ātete pakaru, me te pumau matū. Ki te whakatauritea ki ngā rauemi ātete pakaru whakarewa tuku iho, ka roa ake te ora o ngā taputapu, ka whakaiti i te auau me ngā utu tiaki puta noa i ngā rāngai ahumahi maha, ā, he otinga tino nui mō ngā ahumahi mai i te pūngao me te whakarewa ki te hanga kounga teitei.
Ko tana mahi tino pai e ahu mai ana i ngā raraunga ā-tinana me te matū tika. Ka taea e te pakeke Rockwell (HRA) o te uku alumina te eke ki te 80-90, me te kaha pēhi neke atu i te 850 MPa. E whakaatu ana ngā whakamātautau ngaio ko tōna ātete kakahu he 266 ngā wā i te maitai manganese me te 171.5 ngā wā i te rino maka konupora-tiketike. Mō te ātete pāmahana, ka taea e tōna pāmahana ratonga roa te eke ki te 300°C, ā, ka taea e ia te tu atu ki te waikura waikawa me te kawakore i roto i te awhe pH o te 3 ki te 12. Mā ēnei āhuatanga ka taea e ia te mahi pumau i roto i ngā taiao pānga nui, kakahu nui, me te waikura, hei tauira, ka roa ake te ora ratonga o ngā paipa kawe paura waro neke atu i te 10 ngā wā.
Ko te mahi a te uku alumina ātete-kakahu ka whai hua mai i te whakahaere tika o te tukanga katoa mai i ngā rauemi mata ki te whakakoi. Tuatahi, ka hurihia te paura alumina mata ki te huri tino pai, me te rahi o te matūriki e whakahaeretia ana i raro i te 1 micron, kia tino parakore ai, kia rite ai te tohatoha rahi o te matūriki. Ko ngā tukanga hanga tuatahi ko te pēhi maroke me te pēhi isostatic, ko te mea whakamutunga ka hoatu he kiato ōrite ki te tinana matomato. Hei whakamutunga, ka whakakoihia te tinana matomato i te 1700°C pea, ka hanga he hanganga moroiti-kiriata matotoru, me te kiato rauemi e eke ana ki te 95%. Ka taea e ngā hanganga whakakotahi, pēnei i te tāpiri zirconia (ZrO₂), te whakarei ake i tōna ātete pānga me te pakari.
He whānuitia te whakamahinga o tēnei rauemi puta noa i ngā rāngai ahumahi maha. I roto i ngā ahumahi pūngao me te tiaki taiao, ka whakamahia i roto i ngā paipa paura waro o ngā tipu hiko wera, me ngā whakarōpū me ngā kōne āwhiowhio o ngā tipu sima, ka roa ake te ora o ngā taputapu mā te 3 ki te 5 ngā wā. I roto i ngā ahumahi whakarewa me te keri, ko ngā raina uku kua tāutahia ki roto i ngā paipa weronga waro oumu pupuhi me ngā paipa tango puehu ka ātete pai ki ngā mea tino whakakoi pērā i te paura rino, ka whakaiti i ngā utu tiaki ā-tau tae atu ki te 60%. Hei tāpiri, ka whakamahia hoki ngā uku alumina tino-teitei (hei tauira, 99.7%) i roto i ngā mara hangahanga teitei pērā i te whakakanapa i te papa semiconductor.
Wā tuku: Hakihea-19-2025