PBX 9502棘轮生长微观结构机制的多尺度研究

IF 1.7 3区材料科学 Q3 CHEMISTRY, APPLIED

Journal of Energetic Materials Pub Date : 2022-01-31 DOI:10.1080/07370652.2022.2032485

J. Yeager, D. Montanari, C. Woznick, R. Knepper, K. Bennett

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引用次数: 1

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Multiscale investigation of the microstructural mechanisms driving ratchet growth in PBX 9502

ABSTRACT The high explosive PBX 9502 undergoes irreversible expansion during thermal cycling (“ratchet growth”). Recent innovations in thermomechanical modeling via homogenization strategies are beginning to incorporate mesoscale information such as grain size, total porosity, and spatial distribution of voids and cracks. To generate a complete experimental data set to challenge and inform these models, PBX 9502 pellets were thermally cycled, cross-sectioned using ion polishing, and imaged in high resolution with scanning electron microscopy. Ratchet growth was found to drive expansion through microcracking. Microcracks were affected by agglomeration of crystals within the PBX. Virgin material showed greater ratchet growth than recycled material.

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来源期刊

Journal of Energetic Materials 工程技术-材料科学：综合

CiteScore

5.70

自引率

4.80%

发文量

审稿时长

1.8 months

期刊介绍： The Journal of Energetic Materials fills the need for an international forum of scientific and technical interchange in the disciplines of explosives, propellants, and pyrotechnics. It is a refereed publication which is published quarterly. Molecular orbital calculations, synthetic and analytical chemistry, formulation, ignition and detonation properties, thermal decomposition, hazards testing, biotechnology, and toxicological and environmental aspects of energetic materials production are appropriate subjects for articles submitted to the Journal.