We are processing ferromagnetic shape memory Ni-Mn-Ga foams by replication casting and replication powder metallurgy methods. We are also characterizing their microstructure, composition, phase transformation temperatures and magnetic properties with our collaborators at Boise State University.
We are examining transient phase change and strain development phenomena during the use of Li-ion batteries and the effects of structure and hierarchal architecture on these phenomena using the Advanced Photon Source at Argonne National Laboratory.
We are developing Ni-based superalloys with topologically-optimized micro-architectural features. We use the pack cementation technique to add Al,Ti and Mo to woven or braided structures fabricated from Ni or Ni-Cr wires and transform them into creep- and oxidation-resistant superalloys.
We are developing new a powder-based process to fabricate bulk metallic glasses (Zr57Nb5Al10Cu15 Ni13) with open, elongated pores. The structure and properties of these high-strength foams are studied.
Nanoporous gold has a sponge-like structure with extremely high surface due to the nanometer scale porosity. It has potential applications in sensors, actuators, catalytic materials, etc. We use cutting-edge x-ray nano-tomography and in situ imaging to characterize the structural evolution of nanoporous gold during dealloying and coarsening.