Phase transitions of ε-HNIW in compound systems

The heat-induced phase transitions of ε-HNIW, both neat and coated with various additives used in plastic bonded explosives, were investigated using powder X-ray diffraction and differential scanning calorimetry. It was found that ε-HNIW, after being held at 70°C for 60h, remained in the ε-phase. Ap...

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Bibliographic Details
Published in:AIP advances 2016-05, Vol.6 (5), p.055016-055016-10
Main Authors: Zhang, Jing-yuan, Guo, Xue-yong, Jiao, Qing-jie, Zhang, Pu
Format: Article
Language:English
Subjects:
ADDITIVES
CALORIMETRY
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRITICAL TEMPERATURE
Diffraction
EXPLOSIVES
INDIUM COMPOUNDS
Parameters
PBX (explosives)
PHASE TRANSFORMATIONS
Phase transitions
PLASTICS
POWDERS
TRANSITION TEMPERATURE
X ray powder diffraction
X-RAY DIFFRACTION
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Summary:The heat-induced phase transitions of ε-HNIW, both neat and coated with various additives used in plastic bonded explosives, were investigated using powder X-ray diffraction and differential scanning calorimetry. It was found that ε-HNIW, after being held at 70°C for 60h, remained in the ε-phase. Applying other conditions, various phase transition parameters were determined, including Tc (the critical phase transition temperature), T50 (the temperature at which 50% of the phase transition is complete) and T180 (the percentage of γ-HNIW present in samples heated to 180°C). According to the above three parameters, additives were divided into three categories: those that delay phase transition, those that raise the critical temperature and the transition rate, and those that promote the phase transition. Based on the above data, a phase transition mechanism is proposed.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4950856