Explosive and thermic compositions or charges – Structure or arrangement of component or product – Solid particles dispersed in solid solution or matrix
Patent
1993-09-29
1996-08-20
Walsh, Donald P.
Explosive and thermic compositions or charges
Structure or arrangement of component or product
Solid particles dispersed in solid solution or matrix
149 199, 149 1991, 149 1992, 1491082, 1491096, C06B 4510
Patent
active
055475256
ABSTRACT:
Conductive carbon fibrils are incorporated into energetic compositions to reduce electrostatic discharge susceptibility. 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. An effective amount of fibrils is included in the energetic compositions to decrease the resistivity to a level below or on the order of about 10.sup.10 ohm-cm. In most cases, fibril concentration will be in the range from about 0.005 to about 0.1 weight percent.
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Bennett S. John
Hamilton R. Scott
Hardee J. R.
Lyons Ronald L.
Thiokol Corporation
Walsh Donald P.
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