Graded refractory cermet article
AssigneeMinnesota Mining and Manufacturing Company
InventorsHarold G. Sowman, David R. Kaar
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Abstract
This invention provides a shaped, graded, cermet article comprising at least one continuous ceramic phase and at least one discontinuous metal phase, the ratio of ceramic/metal being controlled and varied over the thickness of the article. The ceramic phase preferably is microcrystalline.
Claims19
A shaped, non-fused, cermet article comprising at least one continuous ceramic phase and containing at least one metal phase of discrete particles separated from each other, the ratio of ceramic/metal being controlled and gradually and continuously varied over the depth of the article so as to provide an article wherein the density of metal is greatest in all the exterior surface portions and decreases towards the innermost portions.
A shaped, non-fused, cermet article comprising at least one continuous ceramic phase and containing at least one metal phase of discrete particles separated from eath other, the ratio of ceramic/metal being controlled and gradually and continuously varied over the depth of the article so as to provide an article wherein the density of metal is greatest in all the exterior surface portions and decreases towards the innermost portions, wherein the exterior surface of said cermet article comprises metal nodules.
Dependencies are inferred from the claim text.