Shock Induced Reaction Process of Ti-Si Reactive Powder

To find out whether there exists an increased shock wave velocity when the Ti-Si reactive powder is loaded by shock, we used the gas gun to drive the flyer to impact the active Ti-Si powder and initiate its reaction.In the process of the powder's self-propagating reaction experiment, high speed cameras were used to measure the combustion wave and the shock wave velocity.The experimental results show that the shock wave propagates in the reactive powder at the velocity of a few hundred meters per second, which is close to the initial flyer velocity, and the shock velocity decreases obviously with the increase of the propagation distance.This phenomenon was also verified in the shock loading process of pure Si powder.The combustion wave propagates in the Ti-Si powder at the velocity of a few centimeters per second, which is very different from the velocity of the shock wave, thus suggesting that the phenomenon of an increased shock wave velocity does not exist.