Wetting resistant materials and articles made therewith
AssigneeGeneral Electric Company
InventorsMolly Maureen Gentleman, James Anthony Ruud, Margaret Louise Blohm, Mohan Manoharan
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Abstract
Ceramic materials with relatively high resistance to wetting by various liquids, such as water, are presented, along with articles made with these materials. The oxide materials described herein as a class typically contain one or more of ytterbia (Yb2O3) and europia (Eu2O3). The oxides may further contain other additives, such as oxides of gadolinium (Gd), samarium (Sm), dysprosium (Dy), or terbium (Tb). In certain embodiments the oxide, in addition to the ytterbia and/or europia, further comprises lanthanum (La), praseodymium (Pr), or neodymium (Nd).
Claims18
A material comprising:
- an oxide comprising from about 60 mole % to about 95 mole % gadolinia and at least about 1 mole % ytterbia or europia, wherein the oxide is B-type monoclinic and wherein the oxide has up to about 25 atomic percent of its total cation content as tetravalent cations.
A material comprising:
- an oxide comprising
- at least about 50 mole % europia;
- and
- samaria, terbia, or dysprosia;
- wherein the material contains up to about 25 atom % of tetravalent cations relative to the total amount of cations present in the material.
A material comprising:
- a B-type monoclinic oxide comprising ytterbia and europia;
- wherein the oxide contains up to about 25 atom % of tetravalent cations relative to the total amount of cations present in the material.
Dependencies are inferred from the claim text.