Nanostructured intermetallic foams

Emily M. Hunt, Michelle L. Pantoya, R. Jason Jouet

Research output: Contribution to conferencePaperpeer-review

Abstract

Highly porous intermetallic alloys were created through self-propagating high-temperature synthesis. The reactants are composed of nano-scale particles of nickel (Ni), micron-scale particles of aluminum (Al), and nano-scale Al particles passivated with a gasifying agent, C13F27COOH. The concentration of nano-Al particles present in the reactant matrix was controlled according to the wt % gasifying agent. Flame propagation was observed to transition from normal to convectively dominant burning as more gasifying agent became present in the reactants. Ignition delay times were reduced by two orders of magnitude when only 2.24 wt % nm Al particles were present. The product alloy expanded by a factor of 14 in the axial direction with 1.6 wt % nm Al (corresponding to 10 wt % gasifying agent). The total porosity of the pellets increased by a factor of 8 (i.e., from 10 to 80% porosity for 0-14 wt % gasifying agent).

Original languageEnglish
StatePublished - 2006
Event2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology - Orlando, FL, United States
Duration: Apr 23 2006Apr 27 2006

Conference

Conference2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology
CountryUnited States
CityOrlando, FL
Period04/23/0604/27/06

Keywords

  • Combustion synthesis
  • Nanostructured intermetallics
  • Nickel aluminides

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