The Research on Molding Super-Hard Material Powder Using Shock Compaction

Abstract

Shock compaction techniques have been developed in order to create new advanced materials with improved and unique properties. The problem in industrializing the technique is the formation of cracks due to the propagation of strong shock wave inside the material to be consolidated and a size limitation for recovered compact. Therefore, we developed a modified apparatus to employ cylindrical configuration. The tungsten carbide is used for a lot of tools by the peculiar mechanical properties. A lot of time is needed for the manufacturing though the solid of the super-hard alloy like the tungsten carbide is manufactured by sintering usually. So we tried shock compaction to make bulk materials of hard-to-consolidate powders using cylindrical configuration. Using the cylindrical configuration, shock compaction experiment was carried out for consolidation of WC-15wt%Co powders. Look of compacted exactly were observed for a sample recovered. High compaction hardness was also measured for the sample. Numerical simulation was carried out using LS-DYNA3D and compared with the experimental result for the WC-15wt%Co compacts.