Effects of Nano Aluminum Powder on the Mechanical Sensitivity of RDX-Based Explosives
Abstract
:1. Introduction
2. Experiment and Calculation
2.1. Reagents and Instruments
2.2. Explosive Preparation
2.3. Performance Test
2.3.1. Impact Sensitivity Test
2.3.2. Friction Sensitivity Test
2.4. Initial Structure Selection and Optimization Calculation of Explosive Components
2.4.1. RDX
2.4.2. Al2O3
2.4.3. Paraffin Molecule
2.4.4. Al2O3 + Paraffin Molecule
3. Results and Discussion
3.1. Microscopic Morphology and Surface Elemental Ratio of Explosives
3.2. Test and Analysis of Surface Energy and Adhesion Work of Materials
3.3. Analysis of Adsorption Energy between Explosive Components
3.4. Test and Analysis of Impact and Friction Sensitivity of Explosives
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Conflicts of Interest
References
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Name | Composition and Weight Ratio (%) |
---|---|
Explosive 1 | nano-Al 30 |
RDX 67 | |
Paraffin wax 3 | |
Explosive 2 | micron Al 30 |
RDX 67 | |
Paraffin wax 3 |
Section No. | Crystal Plane | ||||||
---|---|---|---|---|---|---|---|
(110) | (101) | (011) | (111) | (100) | (010) | (001) | |
1 | −283.38324 eV | −293.38312 eV | −283.38323 eV | −293.0993 eV | −289.0031863 eV | −286.31209 eV | −286.3075026 eV |
2 | −278.86804 eV | −278.887853 eV | −278.886804 eV | −283.32663 eV | −289.0031755 eV | - | −286.3075033 eV |
3 | −286.58172 eV | −286.58182 eV | −286.58891 eV | −283.65849 eV | −289.0031783 eV | −286.0970793 eV | −286.0969497 eV |
4 | −286.65099 eV | −286.65109 eV | −286.65488 eV | −293.09043 eV | −289.0031823 eV | −289.0148331 eV | −289.0031925 eV |
5 | −278.31891 eV | −278.31902 eV | −278.31895 eV | −283.31319 eV | −289.0031799 eV | −289.4154393 eV | −289.0031915 eV |
6 | −293.38288 eV | −283.38337 eV | −293.39229 eV | −293.0993 eV | −289.0031804 eV | −286.3075868 eV | −286.3074286 eV |
7 | - | - | - | −293.0993 eV | −289.0031854 eV | −292.1069331 eV | −292.09674 eV |
Element | Weight Percentage | Atomic Percentage |
---|---|---|
C | 38.10 | 54.53 |
N | 7.38 | 9.06 |
F | 6.24 | 5.64 |
Al | 48.35 | 30.76 |
Total | 100.00 | 100 |
Element | Weight Percentage | Atomic Percentage |
---|---|---|
C | 28.55 | 44.89 |
N | 7.38 | 9.96 |
O | −0.41 | −0.48 |
F | 1.68 | 1.67 |
Al | 62.80 | 43.97 |
Total | 100.00 | 100 |
Reagent | Surface Energy (mJ) | Polar Component (mN/m) | Dispersion Component (mN/m) | Probe Liquid |
---|---|---|---|---|
RDX | 41.29 | 34.44 | 6.85 | water and formamide |
Nano-Al | 40.01 | 12.52 | 27.49 | glycol and glycerol |
Micron-Al | 18.55 | 5.48 | 13.07 | glycol and glycerol |
Paraffin wax | 14.82 | 12.78 | 2.04 | water and glycol |
Materials | Adhesion Work (mJ) |
---|---|
Paraffin with RDX | 49.40 |
Paraffin with nano-Al | 40.31 |
Paraffin with micron-Al | 27.06 |
Structure | Van der Waals Force Correction Method | K-Point Grid | Calculation Accuracy | Adsorption Energy (eV) |
---|---|---|---|---|
Al2O3 | DFT-D3 | 9 × 9 × 1 | Default precision | −298.49886 |
paraffin | DFT-D3 | 1 × 1 × 1 | Default precision | −173.074 |
RDX | DFT-D3 | 3 × 3 × 1 | Default precision | −4173.2264 |
Al2O3 + paraffin | DFT-D3 | 1 × 1 × 1 | Default precision | −4950.088 |
RDX + paraffin | DFT-D3 | 2 × 1 × 1 | Default precision | −4328.7048 |
Structure | Adsorption Energy (eV) |
---|---|
Paraffin-Micro-Al | −0.9301 |
Paraffin-Nano-Al | −2.312 |
Paraffin-RDX | 17.5956 |
+ | Impact Sensitivity (cm) | Friction Sensitivity (%) |
---|---|---|
Explosive 1 | 27.5 | 8 |
Explosive 2 | 97.7 | 0 |
RDX + paraffin wax | 94.5 | 0 |
RDX | 95.7 | 84~76 |
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Dong, J.; Wang, W.; Wang, X.; Zhou, Q.; Miao, R.; Du, M.; Tan, B.; Wang, Y.; Zhang, T.; Li, Y.; et al. Effects of Nano Aluminum Powder on the Mechanical Sensitivity of RDX-Based Explosives. Nanomaterials 2021, 11, 2182. https://doi.org/10.3390/nano11092182
Dong J, Wang W, Wang X, Zhou Q, Miao R, Du M, Tan B, Wang Y, Zhang T, Li Y, et al. Effects of Nano Aluminum Powder on the Mechanical Sensitivity of RDX-Based Explosives. Nanomaterials. 2021; 11(9):2182. https://doi.org/10.3390/nano11092182
Chicago/Turabian StyleDong, Jun, Weili Wang, Xiaofeng Wang, Qiang Zhou, Run Miao, Maohua Du, Bo Tan, Yuanjing Wang, Tengyue Zhang, Yafei Li, and et al. 2021. "Effects of Nano Aluminum Powder on the Mechanical Sensitivity of RDX-Based Explosives" Nanomaterials 11, no. 9: 2182. https://doi.org/10.3390/nano11092182