ARTICLE INCLUDING A COMPOSITE OF UNSTABILIZED ZIRCONIUM OXIDE PARTICLES IN A METALLIC MATRIX, AND ITS PREPARATION

摘要

An article (20) includes a substrate (28, 30) and a composite material (22) bonded to the substrate (28, 30). The composite material (22) includes a matrix (40) consisting of a metallic alloy having a solidus temperature of at least about 700 DEG C and a plurality of unstabilized zirconium oxide particles (42) distributed throughout the metallic alloy. The article is prepared by combining a precursor of the metallic alloy and the mass of unstabilized zirconium oxide powder to form a mixture (62), and applying the mixture (62) as a heterogeneous composite material (22) to a substrate (28, 30) to form the article (20). The step of applying occurs at an application temperature of greater than the solidus temperature of the metallic alloy.