Preparation of composite flier-plate materials with graded density for quasi-isentropic compression

摘要

A new kind of 93W/Cu/Ti/Al/Mg system composite flier-plate material with graded density was successfully prepared by diffusion welding and glue-bonding in the present study, which could be used for quasi-isentropic compression. The mechanism of interfacial joining during the preparation process was studied at first. It was found that the diffusion welding of 93W/Cu was attributed to the diffusion of copper, nickel, iron through Cu-plate/nickel-iron-binders interface, while the joining of Cu/Ti could be seen as the mutual diffusion effect between elements copper and titanium. Then the quasi-isentropic compression experiments of the prepared flier-plates were carried out. The results showed that approximately concave upward quasi-isentropic compression energy waves, which had a small initial pressure jump followed by a stepwise-rising front, were successfully created via the composite flier-plate materials with graded density.