Experimental study of the unsteady burning rate of high-energy materials under depressurization

This paper describes the method and results of an experimental study of unsteady burning rate of high-energy materials containing metal powder additives under depressurization at a rate of 140–160 MPa/s. A method based on stating and solving the inverse problem of internal ballistics is used to determine the unsteady burning rate. The studies are carried out for high-energy materials, including energy additives in the form of metal powders (ASD-4, ASD-6, and Alex aluminum), aluminum diboride, and dodecaboride. It is shown by analyzing the results of the study that the unsteady burning rate of high-energy materials under sharp depressurization is oscillatory and depends on energy additive type.