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Hot pressing differs from ordinary sintering in that it

  • A.applies uniaxial pressure while the part is hot
  • B.uses no heat at any stage of the whole process
  • C.requires the part to be fully immersed in a liquid
  • D.takes place entirely at ordinary room temperature

Answer: A

The applied stress adds to the surface energy driving force and allows full density at a lower temperature and shorter time. The penalty is that only simple shapes can be made and the cycle produces one part at a time.

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