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The three stages of compaction during die pressing are, in order,

  • A.elastic recovery, ejection from the die, and then springback
  • B.granule rearrangement, granule deformation, particle rearrangement
  • C.particle fracture, then melting, then resolidification of the melt
  • D.drying of the granules, binder burnout, and finally sintering

Answer: B

The granules first slide into a denser packing, then deform and break down, and finally the primary particles themselves rearrange. Each stage shows as a distinct region on a plot of density against the logarithm of pressure.

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