The high-pressure phase stability of 2,4,6-trinitrotoluene (TNT)

18th APS-SCCM; 24th AIRAPT

Bowden, P.R.^1 ; Chellappa, R.S.^1 ; Dattelbaum, D.M.^1 ; Manner, V.W.^2 ; Mack, N.H.^3 ; Liu, Z.^4

Shock and Detonation Physics, LANL, Los Alamos

NM

87545, United States^1

High Explosives Science and Technology, LANL, Los Alamos

NM

87545, United States^2

Physical Chemistry and Applied Spectroscopy, Los Alamos

NM

87545, United States^3

Carnegie Institution of Washington, Washington

DC

20005, United States^4

关键词: 2 ,4 ,6-trinitrotoluene;    Detonation properties;    High-pressure phase;    In-situ synchrotrons;    Monoclinic lattices;    Raman spectroscopy measurements;    Spectroscopy measurements;    Temperature isotherms;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/5/052006/pdf
DOI  :  10.1088/1742-6596/500/5/052006

来源: IOP

【 摘 要 】

2,4,6-trinitrotoluene (TNT) is a widely used explosive that is relatively insensitive to initiation by shock loading. While the detonation properties of TNT have been extensively reported, the high pressure-temperature (P-T) stability of TNT has not been investigated in detail. At ambient conditions, TNT crystallizes in a monoclinic lattice (space group P21/a), and our previous X-ray diffraction (XRD) measurements at room temperature suggested a phase transition to orthorhombic (space group Pca21) at ∼20 GPa. In this work, we have performed in-situ synchrotron XRD and vibrational spectroscopy measurements along the room temperature isotherm to investigate phase stabilities up to 18 GPa. While our Raman spectroscopy measurements indicate spectral changes at ∼2 GPa, careful XRD measurements reveal that the monoclinic phase persists up to 10 GPa.