Te putanga hou o te paura alumina i roto i ngā rauemi tā 3D
E hikoi ana ki roto i te taiwhanga o Te Whare Wānanga o Te Tai Tokerau o Te Tai Tokerau, he taiwhanga whakamaroke māramaPūreretā 3D Kei te ngunguru pakupaku, ā, kei te neke tika te hihi laser i roto i te paru uku. I muri tata iho i ētahi haora, ka whakaatuhia katoatia he matua uku me te hanganga matatini pērā i te maze – ka whakamahia hei whakarewa i ngā mata turbine o ngā miihini rererangi. I tohu a Ahorangi Su Haijun, te kaiwhakahaere o te kaupapa, ki te wāhanga ngawari, ā, i mea: "E toru tau ki muri, kāore mātou i maia ki te whakaaro mō taua tino tika. Kei roto i tēnei paura alumina ngaro te putanga nui."
I mua, he rite ngā uku alumina ki tētahi "ākonga raruraru" i roto i te mara oTānga 3D– he kaha teitei, he ātete pāmahana teitei, he pai te whakamarumaru, engari i te wā i tāia ai, he maha ngā raruraru. I raro i ngā tukanga tuku iho, he ngoikore te rere o te paura alumina, ā, he maha ngā wā ka ārai i te pane tā; ka taea e te tere whakaheke i te wā e whakatōngia ana te tae ki te 15%-20%, ā, ko ngā wāhanga i tāia me te kaha nui ka huri te āhua, ka pakaru i te wā tonu ka tahuna; he hanganga uaua? He mea papai rawa atu. Kei te raruraru ngā miihini: "He rite tēnei mea ki tētahi kaitoi uaua, he whakaaro porangi engari kāore i te rawaka ngā ringa."
1. Te tauira Rūhia: Te whakatakoto i te "pūeru uku" ki runga i tekonumohematihiko
I ahu mai te hurihanga tuatahi i te hurihanga o te hoahoa rauemi. I te tau 2020, i panuitia e ngā kaipūtaiao rauemi o te Whare Wānanga Pūtaiao me te Hangarau o te Motu (NUST MISIS) o Rūhia tētahi hangarau whakararuraru. Engari i te whakaranu noa i te paura konumohe waikura, i whakanohoia e rātou te paura konumohe parakore ki roto i te autoclave, ā, i whakamahia te waikura hydrothermal hei "whakatipu" i tētahi paparanga kiriata konumohe waikura me te matotoru ka taea te whakahaere i runga i te mata o ia matūriki konumohe, pērā i te whakatakoto i tētahi paparanga pukupuku taumata-nano ki runga i te pōro konumohe. He tino whakamiharo te mahi a tēnei paura "hanganga anga-matua" i te wā e tāia ana te tā 3D laser (hangarau SLM): he 40% teitei ake te pakeke i tērā o ngā rauemi konumohe parakore, ā, kua tino pai ake te pumau o te pāmahana teitei, e tutuki tika ana i ngā whakaritenga rererangi.
I whakatakoto a Ahorangi Alexander Gromov, te kaiārahi kaupapa, i tētahi kupu whakarite oraora: "I ngā wā o mua, he rite ngā rauemi hiato ki ngā huamata – ko ia rauemi te kaiwhakahaere o tana ake mahi; ko ā mātou paura he rite ki ngā hanawiti – ka ngau te konumohe me te alumina tetahi ki tetahi, papatahi i te papatahi, ā, kāore e taea e tetahi te noho me te kore tetahi." Mā tēnei hononga kaha ka taea e te rauemi te whakaatu i tōna pūkenga i roto i ngā wāhanga miihini rererangi me ngā anga tinana tino māmā, ā, ka tīmata anō te wero i te rohe o ngā koranu titanium.
2. Te mātauranga Hainamana: te makutu o te "whakatakoto" i ngā uku
Ko te tino uaua o te tānga uku alumina ko te whakaitiiti i te sintering – whakaarohia kua ata pokepokea e koe tētahi āhua uku, ā, ka whakaititia kia rite ki te rahi o tētahi rīwai i te taenga ki roto i te oumu. E hia te nui o tōna hinganga? I te tīmatanga o te tau 2024, nā ngā hua i whakaputaina e te tīma a Ahorangi Su Haijun i te Northwestern Polytechnical University i roto i te Journal of Materials Science & Technology i tīmata ai te umanga: i whiwhi rātou i te matua uku alumina tata kore-whakaiti me te tere whakaiti o te 0.3% anake.
Ko te mea ngaro ko te tāpiripaura konumoheki te alumina, kātahi ka whakatangi i tētahi "makutu āhuarangi" tino tika.
Tāpirihia te paura konumohe: Whakaranua te 15% o te paura konumohe pai ki roto i te paru uku
Whakahaerehia te āhuarangi: Whakamahia te tiaki hau argon i te tīmatanga o te sintering hei ārai i te waikura o te paura konumohe.
Whakawhiti atamai: Ina piki te pāmahana ki te 1400°C, hurihia te āhuarangi ki te hau
Te waikura ā-roto: Ka rewa tonu te paura konumohe hei pata, ka waikura hei waikura konumohe, ā, ka whakakorea te whakawhānuitanga o te rōrahi i te whakahekenga
3. Te hurihanga o te here: ka huri te paura konumohe hei "piripiri e kore e kitea"
Ahakoa e kaha ana te mahi a ngā tīma Rūhia me Haina ki te whakarerekē i te paura, kua āta whanake haere tētahi atu ara hangarau – te whakamahi i te paura konumohe hei here.Tānga 3DKo te nuinga o ngā mea e herea ana he kapia rauropi, ka waiho he poka ina tahuna i te wā e tango hinu ana. He rerekē te huarahi e whaihia ana e te patent o tētahi tīma ā-rohe i te tau 2023: te hanga i te paura konumohe hei here wai47.
I te wā e tā ana, ka rehu tika te pūwero i te "piripiri" kei roto ko te 50-70% te paura konumohe ki runga i te paparanga paura konumohe waikura. Ina tae ki te wā tango hinu, ka tangohia te korehau, ka tukuna te hāora, ā, ka waikura te paura konumohe hei konumohe waikura i te 200-800°C. Mā te āhuatanga o te whānui o te rōrahi neke atu i te 20% ka taea e ia te whakakī kaha i ngā pūwero me te whakaiti i te tere whakaheke ki raro iho i te 5%. "He rite ki te wetewete i te tūāpapa me te hanga i tētahi pakitara hou i te wā kotahi, te whakakī i ō ake kōhao!" te whakaahuatanga a tētahi miihini penei.
4. Te toi o ngā matūriki: te wikitoria o te paura porowhita
Ko te "āhua" o te paura alumina kua riro hei kī mō ngā putanga hou - ko tēnei āhua e pā ana ki te āhua o te matūriki. I roto i tētahi rangahau i roto i te pukapuka "Open Ceramics" i te tau 2024, i whakaritea te mahi a ngā paura alumina porowhita me ngā paura alumina koretake i roto i te tānga whakapūmau (CF³)5:
Paura porowhita: rere ana pērā i te onepu pai, neke atu i te 60% te tere whakakī, ā, he maeneene, he maeneene hoki te tānga
Paura koretake: piri rite ki te huka matotoru, ko te matotoru he 40 nga wa teitei ake, a ka aukatihia te nozzle kia ruarua te ora
Heoi anō, ko te mātotoru o ngā wāhanga i tāia e te paura porowhita ka neke atu i te 89% i muri i te whakahinuhinu, ā, ka tutuki tika te mata i te paerewa. "Ko wai kei te whakamahi tonu i te paura "kino" ināianei? Ko te rere o te wai te whai huatanga o te whawhai!" Ka menemene tetahi tohunga hangarau, ā, ka mutu.
Heke mai: Ka noho tahi ngā whetu me ngā moana me ngā mea iti me ngā mea ataahua
Kāore anō kia mutu te hurihanga tānga 3D o te paura alumina. Kua ārahi te umanga hōia i te whakamahi i ngā matua whakaheke tata-kore ki te hanga i ngā mata turbofan; kua aro nui te mara hauora ki tōna hototahitanga koiora, ā, kua tīmata te tā i ngā whakaurunga wheua ritenga; kua arotahi te umanga hikohiko ki ngā papa whakamarara wera - nā te mea, kāore e taea te whakakapi i te kawe wera me te kawe kore-hiko o te alumina.