Strength and Fracture Toughness of Isostatically Hot‐Pressed Composites of Al<sub>2</sub>O<sub>3</sub> and Y<sub>2</sub>O<sub>3</sub>‐Partially‐Stabilized ZrO<sub>2</sub>

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<jats:p>Composites of Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> and Y<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> partially‐stabilized ZrO<jats:sub>2</jats:sub> were isostatically hot‐pressed using submicrometer powders as the starting material. The addition of Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> resulted in a large increase in bending strength. The average bending strength for a composite containing 20 wt% Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> was 2400 MPa, and its fracture toughness was 17 MN·w<jats:sup>−3/2</jats:sup></jats:p>

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