Accession Number:

ADA558892

Title:

Development of Metal Cluster-Based Energetic Materials at NSWC-IHD

Descriptive Note:

Conference paper

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Report Date:

2011-01-01

Pagination or Media Count:

6.0

Abstract:

Current research efforts at NSWC-IHD are utilizing gas-phase molecular beam studies theoretical calculations, and condensed-phase production methods to identify novel metal cluster systems in which passivated metal clusters make up the subunit of a molecular metal-based energetic material. The reactivity of NixAly clusters with nitromethane was investigated using a gas-phase molecular beam system. Results indicate that nitromethane is highly reactive toward the NixAly clusters and suggests it would not make a good passivating ligand for these cluster systems. To date small amounts of a metal-based compound with a subunit containing four aluminum atoms and four Cp ligands has been produced and was characterized using DSC and TGA. Results indicate this cluster material is more reactive than micron- and nano-sized aluminum. However lack of stability in air precludes it from being a viable replacement for current aluminum particles. Volumetric heat of combustion of Al50Cp12 was determined using thermodynamic data obtained from first principles calculations. The Al50 cluster is found to have a heat of combustion near 60 that of pure aluminum.

Subject Categories:

  • Physical Chemistry
  • Theoretical Mathematics
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE