Propagation studies of metastable intermolecular composites (MIC).

Conference · Tue Jan 01 04:00:00 EST 2002

OSTI ID:976179

Son, S F ^[1]; Busse, J R ^[2]; Asay, B W ^[3]; Peterson, P D ^[4]; Mang, J T ^[5]; Bockmon, B ^[6]; Pantoya, M ^[7]

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1. Steven F.
2. James R.
3. Blaine W.
4. Paul D.
5. Joseph T.
6. Bryan
7. Michelle

Thermite materials are attractive energetic materials because the reactions are highly exothermic, have high energy densities, and high temperatures of combustion. However, the application of thermite materials has been limited because of the relative slow release of energy compared to other energetic materials. Engineered nano-scale composite energetic materials, such as Al/MoO{sub 3}, show promise for additional energetic material applications because they can react very rapidly. The composite material studied in this work consists of tailored, ultra-fine grain (30-200 nm diameter) aluminum particles that dramatically increase energy release rates of these thermite materials. These reactant clusters of fuel and oxidizer particles are in nearly atomic scale proximity to each other but are constrained from reaction until triggered. Despite the growing importance of nano-scale energetic materials, even the most basic combustion characteristics of these materials have not been thoroughly studied. This paper reports initial studies of the ignition and combustion of metastable intermolecular composites (MIC) materials. The goals were lo obtain an improved understanding of flame propagation mechanisms and combustion behaviors associated with nano-structured energetic materials. Information on issues such as reaction rate and behavior as a function of composition (mixture ratio), initial static charge, and particle size are essential and will allow scientists to design applications incorporating the benefits of these compounds. The materials have been characterized, specifically focusing on particle size, shape, distribution and morphology.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 976179
• Report Number(s): LA-UR-02-2954
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
COMBUSTION
COMPOSITE MATERIALS
DESIGN
DISTRIBUTION
FLAME PROPAGATION
FOCUSING
IGNITION
MORPHOLOGY
OXIDIZERS
PARTICLE SIZE
REACTION KINETICS
SHAPE