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The bulk glass forming alloy Pd 43 Ni 10 Cu 27 P 20 is processed into a low-density amorphous metallic foam. Pd 43 Ni 10 Cu 27 P 20 is mixed with hydrated B 2 O 3 , which releases gas at elevated temperature and/or low pressure. Very homogeneous foams are achieved due to the high viscosity of the alloy even at its liquidus temperature. By processing at the liquidus temperature and decreasing the pressure to 10 Ϫ2 mbar, well-distributed bubbles expand to foam the material. Foam densities as lowdoi:10.1063/1.1537514 fatcat:ybwy6okamfhcnb5w5ixdo32wqa