The study on the compressive behavior of ptfe/al energetic composite

The metal/fluoro-ploymer energetic composite is a new kindof advanced energetic material. The compressive behaviors and reactiveperformance of polytetrafluorethylene (PTFE)/Al reactive material based ondifferent Al contents are investigated experimentally by split Hopkinsonpressure bar (SHPB) and universal testing machine at different strain rates(ranged from 10^-3s^-1 to 10^3s^-1) respectively atroom temperature. The experimental results showed that the compressivebehavior of PTFE/Al is sensitive to strain rates, that is, the dynamicmodulus and strength are higher at the high strain rate, while the strain islower. The failure behavior of PTFE/Al includes plastic deformation, crackand reaction. Along with the increasing of Al content in PTFE/Al, thecompressive strength is enhanced and then decreased, which achieves amaximal value of 102.6 MPa with static loading and 154 MPa with dynamicloading, respectively, at the content of 35 wt\% Al. Meanwhile, thedifficulty of reaction is increased and perfectibility of reaction isdecreased with the increase of strain rate, while the corresponding stressto initiate reaction of PTFE/Al is almost to be about 165 MPa.