Influence of Aluminum Particle Size on Thermal Decomposition of RDX

Zhu, Yanli; Huang, Hao; Ren, Hui; Jiao, Qingze

doi:10.1080/07370652.2012.688788

Cited by 40 publications

(30 citation statements)

References 26 publications

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“…Brill and his co-workers [29] believed that there is a competition between these two pathways for thermal decomposition of cyclic nitramines. In the case of RDX, the first detected primary products are CH 2 O and N 2 O if the initial reaction pathway is a concerted C-N bond ring fission, and HCN and HONO for the N-N bond cleavage [30]. It is proposed that similar types of decomposition steps for HNIW, since it belongs to the same class of cyclic nitramine compounds.…”

Section: Ms-ftir Analysismentioning

confidence: 98%

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Kinetics of thermal decomposition of ε-hexanitrohexaazaisowurtzitane by TG-DSC-MS-FTIR

Zhu

Shan

Xiao

et al. 2015

Korean J. Chem. Eng.

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Thermal decomposition of ε-hexanitrohexaazaisowurtzitane (HNIW) was studied by thermogravimetrydifferential scanning calorimetry-mass spectrometry-Fourier transform infrared spectroscopy (TG-DSC-MS-FTIR) simultaneous analysis. It has been shown that there is a crystal transition point for ε-HNIW, and only a single decomposition process has been observed for HNIW. The kinetic parameters of thermal decomposition of HNIW were obtained by Kissinger and Flynn-Wall-Ozawa methods, indicating that HNIW has the higher reactivity compared to the other nitramines. The HNIW decomposition mechanism demonstrated by the non-isothermal kinetics conformed to Avrami-Erofeev equation with the factor of nucleus growth of n=1/3 and the conversion degree of α from 0.1 to 0.7. The MS and FTIR analyses indicated that the thermal decomposition of HNIW favors N-N bond cleavage over C-N bond cleavage as the rate determining step.

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Section: Ms-ftir Analysismentioning

confidence: 98%

“…Fig. 5 represents the mass spectra of the gaseous products from HNIW decomposition, which shows the m/z 14,16,17,18,26,27,28,29,30,32,43,44,45,46 and 52 were detected. The onset, peak and end temperatures for the main ion numbers and the possible assignments are summarized in Table 2.…”

Section: Ms-ftir Analysismentioning

confidence: 99%

Kinetics of thermal decomposition of ε-hexanitrohexaazaisowurtzitane by TG-DSC-MS-FTIR

Zhu

Shan

Xiao

et al. 2015

Korean J. Chem. Eng.

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show abstract

“…Actually, besides the energetic material itself, more and more researchers pay their attention to the additives that can be used to improve the thermal decomposition performance of RDX. It has been proved that the characteristics of thermal decomposition of RDX are definitely sensitive to additives [6,7]. Recently, some researchers noticed that several oxides of rare earth element have good activities in catalyzing the decomposition process of RDX in contrast to traditional transition element oxides.…”

Section: Introductionmentioning

confidence: 99%

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Han

Wang

et al. 2015

J Therm Anal Calorim

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Catalyst could significantly improve thermal decomposition performance of energetic materials. However, different approaches for dispersing catalyst into energetic materials lead to quite different results. Generally, improved homogeneity of the mixture always results in better performance. In this paper, a novel method was applied on synthesizing nanoceria; at the same time, electrospray method was introduced to produce homogenous RDX/ceria micropowder. The mixture was characterized and tested by scanning electron microscope-energy-dispersive spectroscopy and differential scanning calorimetry-thermogravimetry. Kissinger method was employed to calculate activation energy of different specimens according to DSC data. Results indicated that with electrospray formation, catalyst (nanoceria) could be evenly dispersed into RDX. In contrast to pure RDX, RDX/ceria mixture could decompose at a lower temperature and has lower activation energy. The calculation results of critical explosion temperature indicated that the mixture is safe for storage and process operation. This study points out a potential way to develop new method to make energetic/catalyst mixture.

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“…We applied the resulting force field to predict the apparent activation energy and the most probable reaction mechanism, validating against experimental results derived from thermal analytical technique. [14][15][16] We also analyzed the oxygen diffusion into Al and the effect of Al slabs with different morphological surfaces on the evolution of initial species of decomposed RDX molecules. It is of significance to gain an insight into the thermodynamic details at the RDX/Al interface.…”

mentioning

confidence: 99%

Thermodynamic Simulation of the RDX–Aluminum Interface Using ReaxFF Molecular Dynamics

Wang

Peng

Pang³

et al. 2017

J. Phys. Chem. C

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Abstract:We use reactive molecular dynamics (RMD) simulations to study the interface between cyclotrimethylene trinitramine (RDX) and Aluminum (Al) with different oxide layers to elucidate the effect of nano-sized Al on thermal decomposition of RDX. A published ReaxFF force field for C/H/N/O elements was retrained to incorporate Al interactions, and then used in RMD simulations to characterize compound energetic materials. We find that the predicted adsorption energies for RDX on the Al (111) for RDX(210)/Al 2 O 3 (0001) provide a more accurate description. We conclude that the origin of these differences in dynamic behavior is due to the variations in the oxide layer morphologies.

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Influence of Aluminum Particle Size on Thermal Decomposition of RDX

Cited by 40 publications

References 26 publications

Kinetics of thermal decomposition of ε-hexanitrohexaazaisowurtzitane by TG-DSC-MS-FTIR

Kinetics of thermal decomposition of ε-hexanitrohexaazaisowurtzitane by TG-DSC-MS-FTIR

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Thermodynamic Simulation of the RDX–Aluminum Interface Using ReaxFF Molecular Dynamics

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