Effects of TiH<sub>2</sub> content on dynamic mechanical properties and impact sensitivity of Al/PTFE

YU Zhongshen; FANG Xiang; LI Yuchun; REN Junkai; ZHANG Jun; SONG Jiaxing

doi:10.11883/bzycj-2018-0256

Volume 39 Issue 9

Sep. 2019

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YU Zhongshen, FANG Xiang, LI Yuchun, REN Junkai, ZHANG Jun, SONG Jiaxing. Effects of TiH2 content on dynamic mechanical properties and impact sensitivity of Al/PTFE[J]. Explosion And Shock Waves, 2019, 39(9): 092301. doi: 10.11883/bzycj-2018-0256

Citation:

YU Zhongshen, FANG Xiang, LI Yuchun, REN Junkai, ZHANG Jun, SONG Jiaxing. Effects of TiH₂ content on dynamic mechanical properties and impact sensitivity of Al/PTFE[J]. Explosion And Shock Waves, 2019, 39(9): 092301. doi: 10.11883/bzycj-2018-0256

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Effects of TiH₂ content on dynamic mechanical properties and impact sensitivity of Al/PTFE

doi: 10.11883/bzycj-2018-0256

Field Engineering Institute, PLA Army Engineering University, Nanjing 210001, Jiangsu, China

Received Date: 2018-07-14
Rev Recd Date: 2018-10-16

Available Online: 2019-08-25

Publish Date: 2019-09-01

Abstract

Abstract

Four kinds of aluminum/ titanium hydride/ polytetrafluoroethylene (Al/TiH₂/PTFE) samples with different TiH₂ contents were prepared by the mixed/compression/sintering method. The dynamic compression mechanical properties, impact sensitivity and reaction characteristics of the reaction materials were studied based on the split Hopkinson pressure bar (SHPB) and drop-weight impact tests. The results indicate that the four materials all show strain hardening and strain rate hardening effects, and the yield strength and hardening modulus increase with the increasing of the strain rate. Under the same loading strain rate, the yield strength of the material increases with the increasing of TiH₂ content, and the compressive strength of the material increases first and then decreases. When the mass fraction of TiH₂ is 5%, the compressive strength of the material reaches the maximum value of 166.4 MPa, which is 6.8% higher than that of the Al/PTFE. Within a certain range of mass fraction (less than 5%), adding TiH₂ helps to improve the impact sensitivity and energy release level of the Al/PTFE material, while the impact sensitivity and the reaction degree gradually decrease when the mass fraction of TiH₂ exceeds 10%. Compared with the Al/PTFE, there are sparks spraying from the reaction region of the TiH₂-contained specimens, and this phenomenon is more significant with the increasing of TiH₂ content.
- Al/TiH₂/PTFE,
- split Hopkinson pressure bar (SHPB),
- drop-weight impact,
- mechanical property,
- impact sensitivity,
- reaction characteristic

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References(23)

References

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