Hostname: page-component-84b7d79bbc-c654p Total loading time: 0 Render date: 2024-07-26T17:27:11.737Z Has data issue: false hasContentIssue false
  • English
  • Français

Energetic Crystal-Lattice-Dependent Responses

Published online by Cambridge University Press:  15 February 2011

R. W. Armstrong ,
H. L. Ammon ,
Z. Y. Du ,
W. L. Elban  and
X. J. Zhang
R. W. Armstrong
Affiliation:
Department of Mechanical EngineeringUniversity of Maryland, College Park, MD 20742.
H. L. Ammon
Affiliation:
Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742.
Z. Y. Du
Affiliation:
Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742.
W. L. Elban
Affiliation:
Dept. Engineering Science, Loyola College, Baltimore, MD 21210.
X. J. Zhang
Affiliation:
Department of Mechanical EngineeringUniversity of Maryland, College Park, MD 20742.
Get access

Abstract

The occurrence of [100] direction slip on the (021) slip plane of orthorhombic RDX (cyclotrimethylenetrinitramine, (CH2·N·NO2]3) is shown to favor the formation of 1,3-dinitroso-5-nitro-l,3,5-triazacyclohexane, as detected in drop-weight impact tests at sensitivity height levels near to those measured for initiation. Also, the reported observation of deformation twinning in the chemically-related monoclinic HMX (cyclotetra-methylenetetranitramine, (CH2·N·NO2 ]4) crystal lattice is explained on the basis of the greater flexibility of the larger HMX molecule allowing a number of bond rotations that are required to produce a relatively unusual Type II deformation twinning structure. These examples give support to the consideration that on the molecular level involved in deformation-induced decompositions there may be a direct mechanical force aspect that is additional to the established importance of “hot spot” heating, say, as described for dislocation pile-up avalanches in RDX.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 296: Symposium Y – Structure and Properties of Energetic Materials , 1992 , 227
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Armstrong, R.W., Coffey, C.S., DeVost, V.F., and Elban, W.L., J. Appl. Phys. 64 (3), 979–984 (1990).CrossRefGoogle Scholar
2. Armstrong, R.W. and Elban, W.L., presented at “The Fundamental Physics and Chemistry of the Combustion , Initiation, and Detonation of Energetic Materials”, Los Alamos National Laboratory, in print as a Chemical Propulsion Information Agency Publication (1992).Google Scholar
3. Hammond, B.L. and Armstrong, R.W., Phil. Mag. Lett. 57, 41 (1988).Google Scholar
4. Armstrong, R.W. and Elban, W.L., in “ONR Workshop on Energetic Material Initiation Fundamentals”, Chemical Propulsion Information Agency Publication 475, (The Johns Hopkins University, Applied Physics Laboratory, Laurel, MD, 1987) p. 177.Google Scholar
5. Connick, W. and May, F.G.J., J. Cryst. Growth 5, 65 (1969).CrossRefGoogle Scholar
6. Elban, W.L. and Armstrong, R.W., in “Proceedings of the Seventh Symposium (International) on Detonation”, (Naval Surface Weapons Center, Silver Spring, MD, 1982) NSWC MP 82–334, pp. 976–985.Google Scholar
7. Elban, W.L., Hoffsommer, J.C. and Armstrong, R.W., J. Mater. Sci. 19, 552 (1984).Google Scholar
8. Armstrong, R.W. and Elban, W.L., in “Microindentation Techniques in Materials Science and Engineering”, edited by Blau, P.J. and Lawn, B.R. (American Society for Testing and Materials, Philadelphia, 1985), ASTM STP 889, p. 109.CrossRefGoogle Scholar
9. Elban, W.L., Armstrong, R.W., Yoo, K.C., Rosemeier, R.G. and Yee, R.Y., J. Mater. Sci. 24, 1273 (1989).Google Scholar
10. Hoffsommer, J.C., Glover, D.J. and Elban, W.L., J. Energetic Mater. 3, 149 (1985).CrossRefGoogle Scholar
11. Hoffsommer, J.C. and Glover, D.J., Combust. Flame 59, 303 (1985).Google Scholar
12. Behrens, R. and Bulusu, S., J. Phys. Chem. 96 (1992) in print.Google Scholar
13. Cady, H.H., private communication.Google Scholar
14. Bursill, L.A. and Lin, P. J., Phil. Mag. Lett. 60 (10), 1–10 (1989).Google Scholar
15. Ammon, H.L. and Du, Z.Y., private communication.Google Scholar
16. Busing, W.R., “WMIN, A Computer Program to Model Molecules and Crystals in Terms of Potential Functions”, (Oak Ridge NationalLaboratory, TN, 1981) Report 5747.Google Scholar