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Effect of Chemistry on the Performance of Calcium Disilicide Primers

Published online by Cambridge University Press:  13 February 2012

Paul Anderson ,
Chris Csernica ,
Mark C. Hash ,
Joseph Hartvigsen  and
Raymond A. Cutler
Paul Anderson
Affiliation:
Explosives Research and Development Branch, ARDEC, Picatinny Arsenal, NJ 07806
Chris Csernica
Affiliation:
Explosives Research and Development Branch, ARDEC, Picatinny Arsenal, NJ 07806
Mark C. Hash
Affiliation:
Ervin Technologies, 200 Industrial Drive, Tecumseh, MI 49286
Joseph Hartvigsen
Affiliation:
Ceramatec, Inc., 2425 South 900 West, Salt Lake City, UT 84119
Raymond A. Cutler
Affiliation:
Ceramatec, Inc., 2425 South 900 West, Salt Lake City, UT 84119
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Abstract

Rotary atomization was used to synthesize spheres of CaSi2-based compositions in order to understand issues relative to primer performance for military applications. Elemental silicon and calcium were used to synthesize the line compound CaSi2 or the eutectic composition between CaSi2 and Si. Fe was added to form FeSi2 as a secondary phase in selected compositions. Rietveld analysis showed that CaSi2 polytypes in the synthesized materials consisted primarily of 6R, with less 3R and some hexagonal material. Synthesized materials had low surface areas (≈0.1 m2/g), but short milling times increased the surface area by an order of magnitude. Peak pressures, pressure rise time, and ignition voltage showed no significant differences between experimentally prepared samples and existing commercial samples. Stoichiometric CaSi2 performed as well as CaSi2-Si or CaSi2-FeSi2-Si mixtures. The military specification for calcium disilicide should be changed to reflect the broad chemistry which can be used for primer performance.

Keywords

energetic materialrapid solidificationx-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1405: Symposium Y – Advances in Energetic Materials Research , 2012 , mrsf11-1405-y01-04
Copyright
Copyright © Materials Research Society 2012

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