DYNAMIC COMPACTION OF POWDERS BY AN OBLIQUE DETONATION-WAVE IN THE CYLINDRICAL CONFIGURATION

A new method has been applied to dynamically compact ceramic powders i n the cylindrical configuration. In this method, a converging oblique detonation is used instead of the sliding detonation used in the stand ard method. The oblique detonation is generated by a configuration usi ng two explosive layers. X-ray flash photographs have been made that s how the detonation and shock fronts in both the standard and new confi guration. In the present article, the shock wave and particle velociti es in the B4C powder have been calculated using the shock and detonati on angles obtained from the photographs in combination with the measur ed detonation velocity. In the two-layer configuration, the pressure a pplied to the powder was increased by a factor of 3.5 compared to the one-layer configuration, in agreement with calculations. The working p rinciple of the two-layer configuration is discussed and compared with a computer simulation of the process.