Thermal analysis of the phases of HMX using X-ray diffraction

✍ Scribed by Herrmann, M.; Engel, W.; Eisenreich, N.

• Book ID: 115503905
• Publisher: Oldenbourg Wissenschaftsverlag
• Year: 1993
• Tongue: English
• Weight: 530 KB
• Volume: 204
• Category: Article
• ISSN: 2194-4946
• DOI: 10.1524/zkri.1993.204.part-1.121

✦ Synopsis

Abstract

The 4 phases of HMX and its transitions were investigated using X-ray diffraction. The phases were heated stepwise in a temperature range from 170 K to 510 K, measuring a diffraction pattern after each step.

The thermal expansion of the different phases and the volume changes during the phase transitions were obtained. Anomalies and strongly anisotropic expansions were observed with β- and γ-HMX.

The highest thermal expansion was found with γ-HMX, followed by δ-, β- and α-HMX. The highest volume change was observed with the β → δ transition, followed by the α → δ and the γ → δ transition.