Patent ID: 8815327
Filing Date: 2014-08-26
Classification: B82Y,C04B

Abstract:
1. A method for preparing a functionally graded glass/zirconia/glass (G/Z/G) sandwich material comprising: (a) applying a powdered glass-ceramic composition to accessible surfaces of a presintered zirconia substrate thereby covering the zirconia substrate surfaces with a layer of the composition wherein the CTE of the glass and the substrate material are substantially the same; (b) infiltrating the glass-ceramic composition into the zirconia substrate forming a graded glass-ceramic layer wherein the graded glass-ceramic layer is from 10 to 500 microns thick on both top and bottom surfaces of the zirconia substrate; (c) densifying the substrate by heating said substrate; and (d) producing a functionally graded glass/zirconia/glass (G/Z/G) sandwich material comprising an outer glass layer, a graded glass-ceramic layer from 10 to 500 microns thick, and an inner zirconia substrate.