No ke aha he mau ʻōhū ma nā wahi wili o ka mīkini wiliwili wahi alapine waena? ʻO ka hoʻokumu ʻana i nā ʻōhū e koi mua i ka hoʻokumu ʻana i kahi kumu ʻūhū, pono e hālāwai i ʻelua mau kūlana: ʻo kekahi ʻo ke kinoea supersaturated ka metala wai, a ʻo kekahi ʻo ia ka ikehu e pono ai no ka nucleation. Ka nānā ʻana a me ka hoʻonā ʻana i ka pilikia o ka solder joint bubbles:
He kiʻekiʻe ka supersaturation i ka metala wai, a ʻoi aku ka kiʻekiʻe o ka supersaturation, ʻoi aku ka paʻa ʻole. Hiki i ke kinoea ke hoʻoheheʻe a hana i nā ʻōhū. No laila, ʻo ka wai i hoʻoheheʻe ʻia i ka welding i nā kūlana supersaturation e pono ai e hana i nā ʻōpū. E like me ke kaʻina hana o ka crystallization metala, hiki ke hana ʻia ka nucleation bubble ma nā ʻano ʻelua: nucleation spontaneous a me ka nucleation non spontaneous. Inā hoʻokumu ʻia kahi ʻōpū, pono e lanakila ka ʻōhū i ke kaomi wai a hana i ka hana hoʻonui
Ma muli o ka piʻi ʻana o ka ikehu ili ma muli o ka hoʻokumu ʻia ʻana o nā ʻāpana hou, inā i hoʻokumu ʻia kahi ʻōpū me ka nui koʻikoʻi i loko o kahi wai, pono e hāʻawi ʻia ka ikehu kūpono e hana ai i ka ikehu nuklea. ʻIke loa, ʻoi aku ka kiʻekiʻe o ka ikehu nucleation, ʻoi aku ka liʻiliʻi o ka hoʻokumu ʻana i kahi kumu bubble. ʻO ka mea ʻē aʻe, ʻoi aku ka maʻalahi o ka hana ʻana i kahi kumu bubble.
Ka manawa hoʻouna: Dec-23-2023
