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Green machining of an isostatically pressed compact is carried out because

  • A.machining is quite impossible after it has sintered
  • B.the binder has to be removed by mechanical means
  • C.the flexible bag cannot produce accurate dimensions
  • D.the compact is far too dense to be fired directly

Answer: C

Cutting a soft green body is quick and uses cheap tooling, whereas machining the fired ceramic requires diamond and considerable time. Allowance must be made for the shrinkage that firing will cause. Green machining removes material at a fraction of the later cost.

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