Ngā poraka uku alumina ātete-mauHe mea hanga tika ēnei poraka mai i te waikura konumohe parakore-teitei (te ihirangi Al₂O₃ ≥ 92–99%) mā te pēhi maroke me te whakamahana pāmahana teitei i te 1,500–1,700°C. Mā tēnei tukanga hanga matatau ka puta he rauemi uku he tino pakeke—e 9 te ine i runga i te tauine Mohs me te HRA 80–90 i runga i te tauine Rockwell, ko te tuarua anake ki te taimana. Me te mātotoru rōrahi o te 3.60–3.85 g/cm³, ko te taumaha o ēnei poraka tata ki te haurua o te maitai, ka whakaiti nui i te kawenga taputapu me te whakarato i te tiaki pai rawa atu mō te kakahu. He tino iti te mimiti wai o te rauemi i raro i te 0.01%, e whakarite ana i te mahi pumau ahakoa i roto i ngā taiao makuku.
Ko te ātete pai rawa atu o ngā poraka uku alumina ka hua ake he roa ake te ora o ngā taputapu me te whakaiti i ngā utu tiaki. E whakaatu ana ngā whakamātautau motuhake ko tō rātou ātete ki te kakahu he tata ki te 260–266 ngā wā i te maitai manganese me te 170–171.5 ngā wā i te rino maka konupora-tiketike. Me te kaha pēhi e eke ana ki te ≥2,000 MPa me te kaha piko o te 255–300 MPa, ka tu atu ēnei poraka ki ngā kawenga pānga taumaha me te kore e pakaru. Ko tō rātou pakari pakaru (KIC) o te ≥4.8 MPa·m¹/² ka whakarite i te roa o te mau i raro i ngā āhuatanga ahotea huringa. Mā ēnei āhuatanga mahi ka waiho ngā poraka uku alumina hei otinga arai pai mō ngā tono kakahu nui pērā i ngā awaawa, ngā hoppers, ngā awhiowhio, me ngā pūnaha whakahaere rauemi.
Mai i te keri me te tukatuka kohuke ki te hanga sima, te hanga maitai, te whakaputa hiko wera, me te tukatuka matū, kua whakamātauhia te uara o ngā poraka uku alumina ātete-pakaru puta noa i ngā ahumahi e aro nui ana ki te pakaru o ngā taputapu. Kei te wātea i roto i ngā tohu parakore o te Al₂O₃ o te 92%, 95%, me te 99%, ka taea te whakarite i ēnei poraka kia tutuki ai ngā whakaritenga tono motuhake, me te parakore teitei ake e whakarato ana i te ātete pakaru me te waikura. Mā te whakauru i ngā poraka uku alumina ki ngā rohe pakaru nui, ka taea e ngā kaiwhakahaere tipu te whakaiti i te wā kore mahi i whakamaheretia, te whakaiti i ngā taonga wāhanga whakakapinga, me te whakatutuki i te utu katoa o te mana pupuri i roto i te huringa ora o ngā taputapu.
Wā tuku: Pipiri-24-2026