I nā hiʻohiʻona ʻoihana o nā umu tunnel a me nā umu pipeline, ua like ke kaiapuni wela kiʻekiʻe me ka "mauna lapalapa" - pono nā ʻāpana lako e kū i ka hoʻomoʻa lōʻihi ma luna o 800 ℃, me ke kūʻē ʻana i ka ʻino ʻana o nā kinoea oxidizing a me nā kinoea acidic. He palupalu a hoʻololi ʻia nā mea metala kuʻuna i kēia kaiapuni, e hopena ana i ka emi koke ʻana o ke ola. Eia naʻe,ke koʻokoʻo wili kaola huinahā i hana ʻia me ka silicon carbide (SiC)Ua like ka mea me kahi "mea hakakā wela kiʻekiʻe", e hilinaʻi ana i kona ʻano kūpaʻa wela kūlohelohe, e lilo ana i "heleuma kai" no ka hana paʻa o nā umu wela kiʻekiʻe.
ʻO ke kumu e hiki ai i nā wili kaola huinaha silicon carbide ke lilo i "mea pāʻani ace" ma ke kahua wela kiʻekiʻe ma muli o ko lākou mau waiwai mea kūikawā:
1. Kūkulu i kahi "pale wela" i kūkulu ʻia e ʻoe iho
Ke ʻoi aku ka mahana ma mua o 1200 ℃, e hana koke ʻia kahi ʻili oxide silicon dioxide mānoanoa (SiO₂) ma luna o ka ʻili o ka silicon carbide. ʻAʻole hiki i kēia papa o ka "pale pale aniani" ke hoʻokaʻawale wale i ka hopena pololei o ka mahana kiʻekiʻe ma luna o ka substrate, akā e pale aku hoʻi i ke komo ʻana o nā kinoea waikawa, e hoʻokō ana i ka "pale pālua e kūʻē i ka pala wela kiʻekiʻe".
2. ʻO ka wela aʻe, ʻo ka ikaika aʻe
ʻAʻole like me ke ʻano o nā mea metala e palupalu i ka wā e hōʻike ʻia ai i ka wela, ʻaʻole wale ka silicon carbide e mālama i kona ikaika kūlou i ka pae wela kiʻekiʻe o 800 ℃ -1350 ℃, akā hōʻike pū kekahi i kahi hoʻonui. ʻO kēia ʻano kino "e kūʻē i ke au" e hiki ai i ka roller bar ke noho paʻa i nā wahi wela kiʻekiʻe, e pale ana i ka hiolo ʻana o ke kūkulu ʻana i hana ʻia e ka palupalu.
3. ʻO ka "kumu teleportation" wela
ʻEhā manawa ka conductivity thermal o ka silicon carbide ma mua o ke kila, hiki ke hoʻopuehu koke a like i ka wela kūloko e like me ke "alanui wela", e pale ana i ka hōʻiliʻili ʻana o nā "wahi wela" i loko o ka umu. ʻAʻole wale kēia ʻano e pale i ka wili ponoʻī, akā mālama pū i ke kūpaʻa o ka mahana o ka hopena desulfurization, e hoʻomaikaʻi ana i ka pono holoʻokoʻa.
Hānau ʻia no nā hiʻohiʻona mahana kiʻekiʻe ʻoihana
ʻO ke kūpaʻa kiʻekiʻe o ka mahana o nā wili kaola huinaha silicon carbide e hoʻolilo iā lākou i mea koʻikoʻi loa i nā hiʻohiʻona desulfurization wela kiʻekiʻe e like me nā paila mana wela, ka sintering kila, a me ka haki kemika. Ma hope o ka hoʻohana ʻana i kēia ʻāpana, hiki i nā ʻoihana ke hōʻemi nui i ke alapine o ka pani ʻana a me ka mālama ʻana i ka mahana kiʻekiʻe, me ka hoʻolōʻihi ʻana i ke ola lawelawe o nā lako i nā manawa he nui o nā mea kuʻuna, e hoʻokō maoli ana i ka "mahana kiʻekiʻe me ka ʻole o ka pani ʻana, ka palekana o ke kaiapuni me ka ʻole o ka hoʻomaʻalili ʻana".
Ma ke ʻano he ʻoihana hou e loea ana i ka noiʻi a me ka hoʻomohala ʻana i nā mea seramika silicon carbide, ua ʻike maikaʻi mākou i nā wahi ʻeha o nā lako ma lalo o nā kūlana hana koʻikoʻi. ʻO kēlā me kēia wili beam square silicon carbide e hōʻike ana i ka ʻimi hope loa o ka ʻepekema mea. I ka wā e hiki mai ana, e hoʻomau mākou i ka nānā ʻana i ka "kū'ē wela kiʻekiʻe" ma ke ʻano he kuhikuhi holomua nui, a hoʻohana i ka mana o ka ʻenehana e pale i ka laina pale ʻōmaʻomaʻo o ka hana ʻoihana.
Ka manawa hoʻouna: ʻApelila-24-2025