Ceria‐doped tetragonal zirconia (Ce‐TZP)/alumina (Al 2 O 3 ) composites were fabricated by sintering at 1450° to 1600°C in air, followed by hot isostatic pressing (postsintering hot isostatic pressing) at 1450°C and 100 MPa in an 80 vol% Ar–20 vol% O 2 gas atmosphere. Dispersion of Al 2 O 3 particles into Ce‐TZP was useful in increasing the relative density and suppressing the grain growth of Ce‐TZP before hot isostatic pressing, but improvement of the fracture strength and fracture toughness was limited. Postsintering hot isostatic pressing was useful to densify Ce‐TZP/Al 2 O 3 composites without grain growth and to improve the fracture strength and thermal shock resistance.
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Sato et al. (1989) studied this question.
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