Abstract
Nano-scale crystal defects extremely affect the security and reliability of the explosive charges of weapons. In order to understand the evolution of nano-scale defects of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaaza-isowurtzitane (CL-20) explosive crystals under thermal treatments, the specific surface, volume fraction and size distribution of the nano-scale defects were studied by using Wide Angle X-ray Scattering (WAXS) and Small Angle X-ray Scattering (SAXS) during the temperature range from 30 °C to 200 °C. The results showed that the number and size of the pores in CL-20 powder did not change significantly during the heating process before phase transformation (30–160 °C). At 170 °C, CL-20 began to convert from ε- to γ- phase, and the specific surface and volume fraction of the nano-scale defects increased significantly. Further investigation of the pore size distribution showed that the number of pores with a small size (radius 9–21 nm) changed particularly significantly, resulting from the cracking of the CL-20 crystal powder during phase transition. At 200 °C, the phase transition was completed and γ-CL-20 was created, and the small-sized pores gradually grew into medium-sized (radius 21–52 nm) pores over time when the temperature was fixed at 200 °C.
Funder
THE NATIONAL SCIENCE FOUNDATION
Subject
General Materials Science
Reference31 articles.
1. Detonation Measurements on Damaged LX-04
2. Shock Initiation of Energetic Materials at Different Initial Temperatures (Review)
3. Shock initiation of explosives: Temperature spikes and growth spurts
4. Intragranular defects and shock sensitivity of RDX/HMX;Hua;Chin. J. Energ. Mater.,2010
5. Deformation, strengths and strains to failure of polymer bonded explosives;Palmer;Proc. R. Soc. Lond. Ser. A Math. Phys. Sci.,1993
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