Study Of New Composite Material Made Of Porous Material Filled With Energetic Material

To solve the existing problems of the air intake port cover material in solid rocket-ramjet engine, such as large ejetca size, long effect time and complex structure, a new kind of energetic composition material were developed in this paper. The energetic composite material is fabricated by filling pores of selected the porous copper and porous ceramics which had special 3d mesh structure with explosives. Explosive refining, filling methods, explosion property and mechanical performance were systematically studied. Influences of filling method, proportion of additives and curing methods on explosive rate, total effect time and compressive capacity of the energetic material were discussed in detail. This study provides a preparation process to make a superior port cover material which has wide application prospect. The results showed that:(1) The explosion property of the energetic base by the vacuum-liquid filling method was very unstable, filling the explosive by manual vibration has low inefficiency and potential safety hazard, whereas filling by the vibration device, which was adapted and the frequency was regulated, can make the charging more close-grained, more security and more stable of completely detonation at the same time.(2) Through screening from several explosives, a cocrystal compound-three ethylene diamines and ethylenediamine(SY) was selected as the filler. SY is easy to prepare and has the advantadge of moderate sensitivity and stable performance. Small sized SY with homogeneous size distribution and good viscosity can be obtained by controlling mixing speed and cooling method.(3) When adding 15%～36% of talcum powder to SY, not only the explosion rate and power of the energetic base were reduced greatly, but also the base was completely detonated at about 1535 m/s. The compressive capacity of energetic base improved from 3.39 MPa to 7.83 MPa when adding 20% of phenolic resin to SY to cure by heating. When the phenolic resin and talcum powder were added to SY together through controlling the proportion of this two ingredients at the same time, the power of the energetic base could be reduced and the compressive strength improved. When cured with further 10 MPa pressure, its compressive capacity could reach to 13 MPa, the explosive rate was 3050 m/s and particle size of the scraps was less than 1 mm.(4) The energetic base processed with all the procedures mentioned in this paper could be reliably initiated, the effect time was less than 30μs and the particle size of scraps was much more smaller at the same time. All these performance show that it had prominent advantages as a port cover on the air intake ports in solid rocket-ramjet engine.