Explosive and thermic compositions or charges – Processes of making
Patent
1993-10-22
1995-11-28
Miller, Edward A.
Explosive and thermic compositions or charges
Processes of making
149 2, 149 191, 1491082, C06B 2100
Patent
active
054704081
ABSTRACT:
Conductive carbon fibrils are incorporated into energetic compositions to enhance the burn rate. The carbon fibrils are grown catalytically from carbon precursors and are substantially free of pyrolytically deposited thermal carbon. The fibrils generally have a length in the range from about 1.mu. to about 10.mu. and a diameter in the range from about 3.5 nanometers to about 75 nanometers. Length to diameter aspect ratios are greater than 5, and typically in the range from about 100:1 to about 1000:1. A 100% improvement in burn rate was observed in compositions containing as little as 0.1 weight percent carbon fibrils. Greater amounts of carbon fibrils (2 weight percent) have increased the burn rate 500%. In most cases, fibril concentration will be in the range from about 0.1 to about 2 weight percent, although greater amounts are possible. The burn rate may be effectively tailored by varying the amount of fibrils added to the composition.
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Lester Dean M.
Nielson Daniel B.
Lyons Ronald L.
Miller Edward A.
Thiokol Corporation
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