Abstract
The possibility to manufacture materials with a functional gradient of mechanical properties such as hardness, toughness and wear resistance by electrophoresis is investigated. Y-TZP/Ce-TZP and Al 2 O 3 /Ce-TZP functionally graded composites were processed by electrophoretic deposition and pressureless sintering in air. The resulting composites show a continuous variation in composition and microstructure. The Vickers hardness was found to increase continuously from the Ce-TZP side to the other side, whereas the indentation fracture toughness decreases along the same direction. In the Ce-TZP/Y-TZP FGM, the hardness increases from 10 to 12 GPa, whereas the loughness decreases from 10 to 3 MPa √m from the Ce-TZP to Y-TZP side. In the Al 2 O 3 /Ce-TZP FGM, the hardness increases from 10 to 14.5 GPa, and the toughness decreases from 13 to 2 MPa √m from the Ce-TZP side to Al 2 O 3 side.
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