Turbine engine abradable systems
AssigneeRtx Corporation
InventorsChristopher W. Strock, Kevin C. Seymour
Life of this patent
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Abstract
In a method for forming an abradable material (36), the abradable material has at least 20% by volume rutile titania (44) and hBN (46). The method includes: blending a first titania powder having an oxygen debit of at least 5.0% with a second titania powder having an oxygen debit, if any, of less than 1.0%. The blend is thermal sprayed. The sprayed blend is then oxidized.
Claims20
A method for forming an abradable material, the abradable material comprising:
- at least 20% by volume rutile titania;
- and
- hBN,
- the method comprising:
- blending a first titania powder having an oxygen debit of at least 5.0% with a second titania powder having an oxygen debit, if any, of less than 1.0%;
- thermal spraying the blend;
- and
- oxidizing the sprayed blend,
- wherein oxygen debit in an oxide of an element is measured relative to a fully oxidized element.
A method for coating a substrate, the method comprising:
- blending a first ceramic powder having an oxygen debit of at least 5.0% with a second ceramic powder having an oxygen debit, if any, of less than 1.0%;
- and
- thermal spraying the blend;
- and
- oxidizing the sprayed blend to reduce a net oxygen debit by at least 50%;
- or;
- co-thermal spraying a first ceramic powder having an oxygen debit of at least 5.0% with a second ceramic powder having an oxygen debit, if any, of less than 1.0%, the co-thermal spraying forming a blend of the first ceramic powder and the second ceramic powder;
- and
- oxidizing the sprayed blend to reduce a net oxygen debit by at least 50%,
- wherein oxygen debit in an oxide of an element is measured relative to a fully oxidized element.
A method for coating a substrate, the method comprising:
- blending a first ceramic powder having an oxygen debit of at least 5.0% with a second ceramic powder having an oxygen debit, if any, of less than 1.0%;
- and
- thermal spraying the blend;
- or;
- co-thermal spraying a first ceramic powder having an oxygen debit of at least 5.0% with a second ceramic powder having an oxygen debit, if any, of less than 1.0%, the co-thermal spraying forming a blend of the first ceramic powder and the second ceramic powder,
- wherein:
- oxygen debit in an oxide of an element is measured relative to a fully oxidized element;
- and
- the first ceramic powder forms 5% to 75% by volume of the as-sprayed blend.
A method for coating a substrate, the method comprising:
- blending a first ceramic powder having an oxygen debit of at least 5.0% with a second ceramic powder having an oxygen debit, if any, of less than 1.0%;
- and
- thermal spraying the blend;
- or;
- co-thermal spraying a first ceramic powder having an oxygen debit of at least 5.0% with a second ceramic powder having an oxygen debit, if any, of less than 1.0%, the co-thermal spraying forming a blend of the first ceramic powder and the second ceramic powder,
- wherein:
- oxygen debit in an oxide of an element is measured relative to a fully oxidized element;
- and
- the first ceramic powder and the second ceramic powder are oxides or silicates of different elements.
A method for coating a substrate, the method comprising:
- blending a first ceramic powder having an oxygen debit of at least 5.0% with a second ceramic powder having an oxygen debit, if any, of less than 1.0%;
- and
- thermal spraying the blend;
- or;
- co-thermal spraying a first ceramic powder having an oxygen debit of at least 5.0% with a second ceramic powder having an oxygen debit, if any, of less than 1.0%, the co-thermal spraying forming a blend of the first ceramic powder and the second ceramic powder,
- wherein:
- oxygen debit in an oxide of an element is measured relative to a fully oxidized element;
- and
- the first ceramic powder and the second ceramic powder are oxides or silicates of the same element.
Dependencies are inferred from the claim text.