Syntactic bulk metallic glass foam

Brothers, A.H.; Dunand, D.C.
February 2004
Applied Physics Letters;2/16/2004, Vol. 84 Issue 7, p1108
Academic Journal
An amorphous metal foam with a bulk density of 3.4 g/cm[sup 3] is created by low-pressure melt infiltration of the bulk metallic glass-forming alloy Zr[sub 57]Nb[sub 5]Cu[sub 15.4]Ni[sub 12.6]Al[sub 10] into a bed of hollow carbon microspheres, followed by rapid quenching. The foam consists of a glassy metallic matrix containing ∼60 vol. % of homogenously distributed carbon microspheres, 25–50 μm in diameter, with small amounts of ZrC at the interface. An amorphous foam with 5 mm diameter showed no measurable loss in thermal stability as compared to the amorphous alloy in bulk form. © 2004 American Institute of Physics.


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