Gold Bulletin

, Volume 41, Issue 3, pp 251–256

Gold and Gold Alloy foams


  • John Banhart
    • Helmholtz Centre Berlin for Materials and Energy(Hahn-Meitner Institute)
Open AccessArticle

DOI: 10.1007/BF03214878

Cite this article as:
Banhart, J. Gold Bull (2008) 41: 251. doi:10.1007/BF03214878


The possibilities to manufacture gold-based foams are explored. Gold powder and various powdered alloying elements are mixed with a small volume fraction of a gas-releasing blowing agent. The blend is compacted to a dense precursor, which is then melted in a further step in order to trigger foam formation. We find that gold-silicon alloys containing 2–3 wt.% of silicon or around 8 wt.% of germanium can be foamed using TiH2 or ZrH2 as a blowing agent. Foams with about 85% porosity are obtained.

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© World Gold Council 2008