Ductile Bulk Metallic Glass Foams

Authors


  • This work was supported by the Defense Advanced Research Project Agency's Structural Amorphous Metals (DARPA-SAM) program and the Caltech Center for Structural Amorphous Metals. The authors thank Richard Scheunemann (Northwestern University) for experimental help in preform fabrication and John DeFouw (Northwestern University) for useful discussions.

Abstract

original image

An open-cell fully amorphous metal foam (see Figure) with a bulk density ca. 1.5 g cm–3 (porosity ca. 78 %) is fabricated from the commercial glass-forming alloy Vit106 (Zr-5%Nb-15%Cu-13%Ni-10%Al, in at.-%), using the salt-replication technique. Despite the absence of significant plasticity in the monolithic alloy, the foamed alloy is ductile in compression and achieves engineering strains of 50 % without failure, giving it potential as a lightweight structural material or bone-replacement implant.

Ancillary