| Autor: |
Kotomin, A. A., Dushenok, S. A., Kozlov, A. S. |
| Předmět: |
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| Zdroj: |
Combustion, Explosion, & Shock Waves; Jun2024, Vol. 60 Issue 3, p326-332, 7p |
| Abstrakt: |
The detonability of mixtures of solid and liquid explosives (explosive suspensions) has been little studied although they are part of plastisol and paste explosive compositions widely used in practice. This paper presents an experimental study of the critical detonation diameters of suspensions of PETN, RDX, HMX, and FOX-7 of various dispersity (specific surface area 350–7000 cm2/g) in nitromethane. The concentration of crystalline explosives in suspensions was 3–60% (wt.). Suspensions were prepared using a vibrovacuum method. The sedimentation stability and homogeneity of suspensions were ensured by their thickening with a small addition of aerosil (2.0–2.5%). Charges of suspensions were prepared in thin-walled polyethylene terephthalate tubes of various diameter. Thus, the critical detonation diameter of explosive suspensions was determined for practically unconfined charges. The dependences of the critical detonation diameter of suspensions on the volume fraction of solid explosives have the same nearly S-shaped form. The effect of the dispersity of explosives on these dependences was shown. The obtained dependences for suspensions of solid explosives in nitromethane were compared with similar experimental dependences for other explosive systems: solutions of liquid explosives in nitromethane, solutions of solid explosives in nitromethane, binary mixtures of finely dispersed solid explosives, binary mixtures of coarsely and finely dispersed explosives, and compositions containing mixtures of coarsely and finely dispersed explosives and an inert binder. It was found that the dependences for the suspensions are similar to those for binary mixtures of coarsely-dispersed and micron-sized explosives and compositions based on these mixtures (distinct heterogeneous systems). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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