METHOD FOR PRODUCING ZIRCONIA-REINFORCED ALUMINA GRAINS AND GRAINS, IN PARTICULAR ABRASIVE GRAINS, PRODUCED BY SAID METHOD

摘要

The invention relates to a method for producing zirconia-reinforced Al2O3 grains (9, 12), comprising at least the following steps: inductively melting a starting mixture (2) to form a eutectic melt made of alumina and zirconia (102); applying the eutectic melt (4) as a thin layer material (6, 12), the thin layer material (6, 12) being quenched (104, 107); removing the thin layer material (12); wherein here abrasive grains (12) can be formed directly (107) or the thin layer material (6) can be classified when it is broken into abrasive grains (9) (105, 106), wherein the grains (9, 12) are polycrystalline without amorphous glass phases as an alumina matrix having zirconia precipitations (22, 22a) and wherein at least some of the zirconia precipitations (22a) formed in the nanoscale range.