Forming during Shock Compaction
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Methods are presented for the forming of articles during shock compaction of powders in the cylindrical configuration. The forming methods make use of mandrels of either a polymer or a metal, since those materials can easily be machined in the required shape. The polymer mandrel decomposes during the shock compression process, forming a hole in the compact with the dimensions of the mandrel. Aluminum mandrels do not decompose, but may change their shape during the compaction process. The aluminum of the mandrel can also be used for a subsequent melt infiltration of the remaining pores in the compacts. In this way fully dense venturi shaped nozzles of TiB<SUB>2</SUB>-Al have been fabricated.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 852-854, 1998
The Japan Society of High Pressure Science and Technology