Decomposition of gamma-Cyclotrimethylene Trinitramine (gamma-RDX): Relevance for Shock Wave Initiation

作者：Dreger Zbigniew A^*; Gupta Yogendra M

来源：Journal of Physical Chemistry A, 2012, 116(34): 8713-8717.

DOI：10.1021/jp306589h

To elucidate the reactive behavior of RDX crystals at pressures and temperatures relevant to shock wave initiation, Raman spectroscopy and optical imaging were used to determine the pressure-temperature (P-T) stability and the decomposition of gamma-RDX, the high pressure phase of RDX. Experiments were performed on single crystals in a diamond anvil cell at pressures from 6 to 12 GPa and at temperatures up to 600 K. Evidence for the direct decomposition of gamma-RDX above 6 GPa, without the involvement of other phases, is provided. The upper limit of the P-T locus for the gamma-RDX thermal decomposition was determined. A refined P-T phase diagram of RDX is presented that includes the current findings for gamma-RDX. The static compression results are used to gain key insight into the shock initiation of RDX, including a determination of the RDX phase at decomposition and understanding the role of pressure and temperature in accelerating shock induced decomposition. This study has established the important role that gamma-RDX plays in decomposition of RDX under static and shock compression conditions; thus theoretical modeling of RDX decomposition at high pressures and temperatures needs to incorporate the gamma-phase response.

• 出版日期2012-8-30