Ngā Pōro Huri Ukume Alumina-Tiketike: Pāpāho Huri Mahi-Tiketike

Teitei-aluminiumpōro huri uku aluminaHe rauemi uku hangarau matatau ēnei, he mea hanga tuatahi ki te konumohe waikura (Al₂O₃), ā, ko te nuinga o te wā he nui ake i te 90%. He tino pakeke, he ātete ki te kakahu, he tino pumau te matū, ā, he iti te poke, e whai hua whānuitia ana i roto i ngā tukanga huri mākū, maroke rānei mō ngā ahumahi pēnei i ngā uku, peita, matū, keri, me ngā rauemi hiko. Me te mātotoru neke atu i te 3.6 g/cm³ me te pakeke Vickers tae atu ki te HV1500, teitei ake rānei, ka tino whakarei ake i te pai o te huri me te whakaiti i te whakamahinga o ngā pāpāho.

Ko ō rātou painga matua ko te whakapai ake i te pai o te huri me te mahi ōhanga. Ko te pakeketanga teitei (te pakeketanga Mohs grade 9) ka whakarite kia tere te pakaru o ngā rauemi pakeke; ko te hanganga moroiti ōrite ka whakarato i ngā reiti kakahu ōrite me te roa o te ratonga. Ko te koretake o te matū ka taea te ātete ki ngā waikawa kaha me ngā kawakore, ka ārai i te poke o ngā rauemi whenua. Ko te iti rawa o te toenga rino (i raro iho i te 0.01%) e tino pai ai mō ngā tono tairongo-parakore, pērā i ngā rauemi pākahiko lithium, ngā karaihe kounga teitei, me ngā uku hiko.

Ko te tukanga hanga he whakarite paura e tino whakahaerehia ana, he pēhi isostatic, me te sintering pāmahana teitei hei whakatutuki i te whakakīkītanga teitei, kia iti ai te porosity me te pakari o te pakaru. Ko te tirotiro kounga e kapi ana i te tika o ngā āhuatanga, te porowhita, te pakeke, me te ātete pānga hei whakatutuki i ngā whakaritenga o ngā taputapu huri me ngā āhuatanga tukanga. Mā te whiriwhiri tika i ngā whakatakotoranga (hei tauira, ngā diameter mai i te 1mm ki te 50mm) me ngā ōwehenga whakakī ka taea te whakapai ake i te pai o te huri me te whai hua o te whakapaunga pūngao.

I te pikinga ake o ngā tono mō te rahi o ngā matūriki pai ake me te parakore teitei ake i roto i te whakahoutanga ahumahi, kua noho ngā pōro huri uku alumina-teitei hei rauemi huri e kore e taea te whakamahi i roto i ngā rāngai matū hou me ngā rāngai rauemi hou. Mā te whakarei ake i te kounga hua me te whakaiti i ngā utu whānui, ka whakaratohia he otinga hangarau pono mō ngā ahumahi tukatuka tika. I te heke mai, mā te arotakenga o ngā hanganga rauemi me te whanaketanga o te hangarau whakarerekētanga mata ka whānui ake te whānuitanga o tā rātou tono.