Preparation of HMX/Al Composite Particles with “Surface Embedded and Inner Coated” Microstructure bySpray Coating and Its Applied Performance

doi:10.3969/j.issn.1000-1093.2021.08.007

Abstract

Abstract: In order to improve kinetics conditions of aluminum during detonation, HMX/Al composite particles were prepared by spray coating method, and aluminized explosives containing the particles were prepared. The morphologies and surface element composition of composite particles were characterized by scanning electron microscopy (SEM) and energy dispersive spectrum (EDS), and the chemistry structure was analyzed by infrared spectroscopy (IR). Explosion performance of HMX/Al composite-based aluminized explosive were estimated through the test of mechanical sensitivity, detonation heat, metal driving and explosion chamber. Results show that the optimized preparation conditions of “surface embedded and inner coated” microstructure are powdered aluminum with particle size of 13 μm without F2603 pre-coating and ester pre-cleaning. The connection of composite particles between HMX and Al is formed by non-bonding. The preparation process has no significant effect on impact sensitivity of composite particles, while the friction sensitivity of HMX/Al composite particles with “surface embedded and inner coated” microstructure is significantly reduced from 88% to 12%. Detonation heat, maximum speed of metal-driving flyer and afterburning maximum temperature of composite particles-based aluminized explosives are 5.5%, 7.3% and 6.4% higher than those of traditional samples, respectively. This indicates that the HMX/Al composite particles can be used to make the aluminum powder participate in detonation reaction in advance and improve its reaction completeness.

Key words: HMX/Alcompositeparticle, spraycoatingmethod, microstructure, reactioncompletenessofpowderedaluminum

CLC Number:

TQ564.3
TJ55

FENG Xiaojun， XUE Lexing， FENG Bo， PAN Wen. Preparation of HMX/Al Composite Particles with “Surface Embedded and Inner Coated” Microstructure bySpray Coating and Its Applied Performance[J]. Acta Armamentarii, 2021, 42(8): 1631-1637.

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第42卷第8期2021 年8月
兵工学报ACTA ARMAMENTARII
Vol.42No.8Aug.2021

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