Description: The Naval Research Laboratory (NRL) has eliminated the formation of aluminum oxide coating, the impediment associated with burn kinetics for metal-Al Hydride nano-scale particles. NRL Investigators have developed a method for producing stabilized Zr-Al Hydride nano-scale particles with carbohydrate based gel coatings that are air stable. Synthesis of surface passivated Zr-Al mixed metal-hydride nanoparticles was accomplished via a multi-step process under inert atmosphere conditions, which involved a sonochemically-mediated decomposition of a pre-synthesized zirconium-aluminum-hydride precursor. The particles were surface passivated using carbohydrates and were shown to be stable in air and partially stable in water. Some of the possible applications for this nanopowder material are as an energetic additive or a metallization agent for energetic mixtures, solid fuel, and other applications.

Advantages/Features Include:

  • Provides air and moisture resistant reactive metal nano-particles
  • Processing provides >90% of active metal by mass
  • Nano-particles have high surface area (260 m2/g) and accelerate burn kinetics

Applications Include:

  • Energetic Additives
  • Solid Metal Fuel
  • Propellants

References:

  • “Surface Passivated Air and Moisture Stable Mixed Zirconium Aluminum Metal-Hydride Nanoparticles” Mater. Res. Soc. Symp. Proc. Vol. 1056 (2008) 1056-HH03-16.

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