Coated ceramic parts and method of fabricating same
AssigneeOwens-Brockway Glass Container Inc.
InventorsDale C. Milliken, William E. Bosken, Jr.
Life of this patent
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Abstract
An abrasion resistant article (10, 30, 40) for use, while submerged or partly submerged in molten glass, in a glass article manufacturing operation, the article having a ceramic element (12, 32, 42) coated on its molten glass contacting surfaces with a thin base coating of a nickel chromium-aluminum-cobalt-yttria-composite powder (18, 34, 44) and a somewhat thicker coating (20, 36, 46) of a prealloyed ceria-yttria stabilized zirconium oxide superimposed on the base coating.
Claims11
A method of improving the resistance to abrasion from molten glass of a ceramic element that is adapted for use in contact with molten glass, the method comprising:
- applying, to a molten glass contacting surface of the ceramic element, a thin base coating of a nickel chromium-aluminum-cobalt-yttria-composite powder;
- applying to the thin base coating a somewhat thicker coating of a prealloyed ceria-yttria stabilized zirconium oxide;
- and then
- heating the ceramic element with the thin coating and the thicker coating to produce a durable, abrasion-resistant molten glass contacting surface on the ceramic element.
An abrasion-resistant ceramic element adapted to be used in contact with molten glass, the ceramic element comprising:
- a thin base coating of a nickel chromium-aluminum-cobalt-yttria-composite powder on each molten glass contacting surface of the ceramic element;
- and
- a somewhat thicker coating of a prealloyed ceria-yttria stabilized zirconium oxide on the exterior of the base coating.
A ceramic element according to claim herein the ceramic element is an annular feeder tube, and wherein each of the base coating and the thicker coating is applied to the feeder tube both on its inner surface and its outer surface, to the depth of the feeder tube that is adapted to be submerged in molten glass.
Dependencies are inferred from the claim text.