Zirconia-toughened alumina ceramics of helical spring shape with improved properties from extruded sol-derived pastes

摘要

High strength (1270 MPa) and tough (>9 MPa m~(1/2)) zirconia-toughened alumina (ZTA) ceramics with a helical spring shape were produced fromsol-derived pastes comprising a mixture of boehmite (γ-AlOOH) and nano-size zirconia powders using extrusion. It is shown that the mechanical response of the extruded ZTA ceramics can be controlled/altered by manipulating the microstructure.