Alumina-zirconia composites Al 2 O 3 -20 vol. % yttria stabilized zirconia containing two types of yttria stabilized zirconia: 3mol% yttria doped ZrO 2 (3YSZ) and 8mol% yttria doped ZrO 2 (8YSZ) were consolidated very rapidly to full density by high frequency induction heat sintering (HFIHS). A comparison between 3YSZ and 8YSZ as a second phase toughening alumina has been made. Effects of sintering temperature on the mechanical properties have been studied. The consolidated samples were

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... ated by X-ray diffraction (XRD) and scanning electron microscope (SEM). The microhardness, strength and toughness of the composites are determined. The results showed that, 3YSZ is the most effective as a second phase toughening alumina than 8YSZ. Al 2 O 3 -3YSZ composites with higher mechanical properties and small grain size developed through this technique.