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Title: Mesoscale evolution of voids and microstructural changes in HMX-based explosives during heating through the β-δ phase transition

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4927614· OSTI ID:1241990

HMX-based explosives LX-10 and PBX-9501 were heated through the β-δ 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 β-δ 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.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344; AC02-05CH11231; AC02-06CH11357
OSTI ID:
1241990
Alternate ID(s):
OSTI ID: 1229565
Report Number(s):
LLNL-JRNL-669215; JAPIAU
Journal Information:
Journal of Applied Physics, Vol. 118, Issue 5; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

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Cited By (6)

Characterization of Crystal Microstructure Based on Small Angle X-ray Scattering (SAXS) Technique journal January 2020
In Situ Imaging during Compression of Plastic Bonded Explosives for Damage Modeling journal June 2017
The Thermal and Microstructural Effect of Plasticizing HMX-Nitrocellulose Composites journal March 2017
Molecular Theory of Detonation Initiation: Insight from First Principles Modeling of the Decomposition Mechanisms of Organic Nitro Energetic Materials journal February 2016
Microscale Electromagnetic Heating in Heterogeneous Energetic Materials Based on X-ray Computed Tomography journal April 2016
Core-Shell Structured HMX@Polydopamine Energetic Microspheres: Synergistically Enhanced Mechanical, Thermal, and Safety Performances journal March 2019