ʻO ka pahu metala kahi mea hoʻohui metala kūikawā me nā lua ea pua. Ma muli o kāna mau hiʻohiʻona kūʻokoʻa, loaʻa i ka foam metala kekahi mau mea maikaʻi loa e like me ka haʻahaʻa haʻahaʻa haʻahaʻa, ke kūpaʻa ahi maikaʻi, ka walaʻau maikaʻi a me ka hana hoʻohaʻahaʻa leo a hiki ke ʻeli a hoʻopaʻa i nā hawewe lekiō, a me nā mea ʻē aʻe. e ulu pū ana me ke ʻano hoʻomohala ʻenehana kiʻekiʻe o ka poʻe i hoʻohana mau ʻia i ka aerospace, nā lako petrochemical a me kahi ʻano o ka hoʻolālā hoʻomohala hana ʻenehana.

Porosity
ʻO ka porosity ka ratio o ka nui o nā porosity āpau i loko o ke kino hale porous i ka nui o ka nui o ke kino hale porous, e noʻonoʻo pinepine ana i ka nui o ka interstitial space o ke kino hale porous.
Loaʻa pinepine ka porosity o ka pahu metala ma mua o 90%, a loaʻa iā ia kahi ikaika compressive a me ke kuʻi ʻana o nā mea metala porous. He porosity kiʻekiʻe kēia ʻano metala, a hiki ke anawaena o ka porosity i ka pae mm.