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State whether the following is true or false.
Pure unstabilised zirconia is suitable for structural ceramic components.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: C

It transforms on cooling with a volume change large enough to crack the piece apart. Stabilisers are not an optional refinement but a requirement for the material to survive firing at all. The volume change on transformation is several per cent.

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