No ke aha ke kumu kūʻai nui o ka pahu metala?

Puhu metala, i ʻike ʻia he metala porous, he mea i haku ʻia me ka metala paʻa me ka nui o nā pores pili. ʻAʻole hāʻawi wale kēia mau pores i ka pahu metala i kona ʻano māmā a me kona ʻano porous, akā ʻo kona mau ʻano ʻano like ʻole, e like me ke kiʻekiʻe o ka ikaika-a-kaumaha ratio, maikaʻi ka hopena hopena, a me ka ʻoi aku o ka ikehu absorption. Hoʻohana kēia mau waiwai i nā mea hoʻoheheʻe metala i mea nani no nā ʻano noi like ʻole, me ka ʻoihana aerospace, automotive, pūʻali koa a me nā ʻoihana biomedical.

No laila, no ke aha ke kumu kūʻai nui o ka metala foam? Nui nā kumu i ke kumu kūʻai nui o kēia mea. ʻO ka mea mua, paʻakikī ke kaʻina hana o ka metala foam a ua holomua nā koi ʻenehana. ʻO ke ala maʻamau o ka hana ʻana i ka huʻa metala, ʻo ia ka hoʻohana ʻana i ka pauka metala a me kahi mea hoʻohua, hui pū ʻia, a laila wela iā lākou e hana i nā ʻōpū i loko o ka matrix metala. Pono ke kaʻina hana i ka mana pololei o ka mahana, ke kaomi a me ka hoʻohui kemika, kahi e hoʻonui ai i nā kumukūʻai hana.

Eia kekahi, ʻo nā mea i hoʻohana ʻia no ka hana ʻana i nā ʻūhā metala he mea kūʻai pinepine. ʻO nā pauka metala kiʻekiʻe a me nā mea hoʻohāhā he mea nui ia e hana i nā huʻa metala me nā waiwai i makemake ʻia, a he kumukūʻai kēia mau mea. Eia kekahi, ʻo ka hana ʻana o ka pahu metala e komo pinepine i nā ʻanuʻu he nui e like me ka pauka metallurgy, foaming a me ka sintering, nā mea āpau e koi ai i nā lako kūikawā a me nā limahana akamai, e hoʻonui hou ana i nā kumukūʻai holoʻokoʻa.

ʻO kekahi kumu kumu i ke kumu kūʻai kiʻekiʻe ohuʻa metalaʻo ia ka palena hana palena. Ma ke ʻano he mea kūikawā hou loa, ʻoi aku ka haʻahaʻa o ka hana ʻana i ka pahu metala i ka hoʻohālikelike ʻia me nā metala kahiko a me nā ala. 'O ia ho'i, 'a'ole pili ka 'oihana waiwai o ka unahi me ka hana nui i ka hu'a metala, no laila ke ki'eki'e o ke kumu kū'ai.

ʻOiai ke kumu kūʻai kiʻekiʻe, ʻo nā waiwai kūʻokoʻa o ka pahu metala e lilo ia i mea hoʻolimalima maikaʻi no nā ʻoihana e koi ana i kāna mau waiwai kikoʻī. No ka laʻana, i loko o ka ʻoihana aerospace, kahi koʻikoʻi o ka hoʻemi ʻana i ke kaumaha, ʻo nā waiwai māmā a me ka ikaika ʻoi aʻe o nā pahu metala e lilo lākou i mea kūpono no nā ʻāpana mokulele. Pēlā nō, i loko o ka ʻoihana kaʻa, ʻo ka hiki ke hoʻopaʻa ʻana i ka ikehu o nā ʻūhā metala e lilo lākou i moho maikaʻi loa no ka māmā, nā mea pale i ka hopena i nā kaʻa, e kōkua ana i ka hoʻomaikaʻi ʻana i ka palekana holoʻokoʻa.

I ka hōʻuluʻulu manaʻo, ʻoiai ʻo ka pahu metala hemea hou a maʻalahime kahi ākea o nā noi, ʻo kona kumukūʻai kiʻekiʻe he mea keakea nui i kāna hoʻohana ākea. ʻO nā kaʻina hana paʻakikī, nā mea pipiʻi a me ka pālākiō hana liʻiliʻi e kūʻai nui i ka huʻa metala. Eia nō naʻe, ke hoʻomau nei ka ʻenehana a me nā ʻano hana hana, e hāʻule paha ke kumukūʻai o nā ʻūhā metala i ka wā e hiki mai ana, e lilo ia i koho ʻoi aku ka maikaʻi o ka hoʻokele waiwai no kahi ākea o nā noi.