Patent ID: 9212302
Filing Date: 2015-12-15
Classification: B82Y,C04B,C09K

Abstract:
1. Method for producing polycrystalline zirconia-reinforced alumina (Al 2 O 3 ) grains, comprising at least the following steps: a) inductively melting a solid starting mixture to form a eutectic melt composed of alumina and zirconia; b) applying the eutectic melt as a thin layer material having a layer thickness with quenching of the thin layer material; c) removing the thin layer material as grains; d) the grains being polycrystalline, formed without amorphous glass phases, and having an alumina matrix containing zirconia precipitates; and e) at least a portion of the zirconia precipitates are segregated in the nanoscale range, with greater than 50% of the zirconia precipitates having diameters less than 100 nm.