David Dunand Research Group

Northwestern University

Metallic Foams

We are involved in experimental and theoretical studies of the synthesis, structure and mechanical properties of a various metallic foams, in particular those with high melting points

Aluminum-based Metallic Foams Dr. Olivier Couteau We study the synthesis of titanium foams by superplastic expansion of argon bubbles contained in a solid titanium matrix. The foaming kinetics are modeled as a function of time, temperature, and pore initial pressure, size and fraction. Nickel-based Metallic Foams John DeFouw and Yuttanant Boonyongmaneerat [Vee] We are developing a new process to create open-cell foams (intermetallic NiAl or superalloy Ni-Cr-Al) by pack-aluminization of nickel foams. The foam creep properties are measured and modeled by the finite-element method. Titanium-based Metallic Foams Scott Oppenheimer and Jessica Li and Danny Jorgensen We study the synthesis of titanium foams by superplastic expansion of argon bubbles contained in a solid titanium matrix. The foaming kinetics are modeled as a function of time, temperature, and pore initial pressure, size and fraction. Iron-based Foams Justin Scott We are examining methods to create high-chromium, ferritic steel foams with an open-cell structure.  Both microstructure and mechanical properties will be studied to optimize processing techniques. NiTi-based Foams Ampika Bansiddhi and Scott Oppenheimer We are investigating processing methods to achieve open or close-cell NiTi foams with superelastic or shape-memory compositions. We are also characterizing the mechanical properties of these foams. Bulk Metallic Glass Foams Alan Brothers and Marie Cox We are developing new melt-based processes to fabricate open- and closed cell foams of bulk metallic glasses (Zr57Nb5Al10Cu15 Ni13). The structure and properties of these high-strength foams are studied.

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