Energy release characteristics of PTFE/Al/TiH₂ reactive jet with different TiH₂ content

Titanium hydride (TiH₂), a promising high-energy additive, is doped into PTFE/Al to optimize the energy output structure of the reactive jet and strive for better aftereffect damage ability to the target. Six types of PTFE/Al/TiH₂ reactive liners with different TiH₂ content are prepared by the molding and sintering method. The energy release characteristics of PTFE/Al/TiH₂ reactive jet are tested by the transient explosion energy test, and are characterized from pressure and temperature. The reaction delay time, pressure history, and temperature history of the energy release process are obtained, then the actual value of released energy and reaction efficiency of the reactive jet are calculated. The results show that the peak pressure and temperature of the PTFE/Al/TiH₂ jet initially increase and then decrease with increasing TiH₂ content. When the TiH₂ content is 10%, the actual value of released energy and reaction efficiency increased by 24% and 6.4%, respectively, compared to the PTFE/Al jet. The reaction duration of the reactive material is significantly prolonged as the TiH₂ content increased from 0% to 30%. Finally, combined with the energy release behaviors of PAT material and the dynamic deformation process of liner, the enhancement mechanism of TiH₂ on energy release of the reactive jet is expounded.