期刊
JOURNAL OF APPLIED PHYSICS
卷 118, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4927614
关键词
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资金
- Joint DoD-DOE Munitions Technology Development Program
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- National Science Foundation/Department of Energy [NSF/CHE-1346572]
- U.S. DOE [DE-AC02-06CH11357]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1346572] Funding Source: National Science Foundation
HMX-based explosives LX-10 and PBX-9501 were heated through the beta-delta phase transition. Ultra-small angle x-ray scattering (USAXS) and molecular diffraction were simultaneously recorded as the HMX was heated. Mesoscale voids and structure dramatically change promptly with the beta-delta phase transition, rather than with other thermal effects. Also, x-ray induced damage, observed in the USAXS, occurs more readily at elevated temperatures; as such, the dose was reduced to mitigate this effect. Optical microscopy performed during a similar heating cycle gives an indication of changes on longer length scales, while x-ray microtomography, performed before and after heating, shows the character of extensive microstructural damage resulting from the temperature cycle and solid-state phase transition. (C) 2015 AIP Publishing LLC.
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