Blade outer air seal with improved efficiency
AssigneeUnited Technologies Corporation
InventorsChristopher W. Strock, Matthew E. Bintz
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Abstract
An air seal for use with rotating parts in a gas turbine engine has a matrix of agglomerated fine hBN (hexagonal boron nitride) powder, the particles of which having a first dimension, and of a fine metallic alloy powder, the particles of which having a second dimension. An hBN (hexagonal boron nitride) powder, the particles of which have a third dimension that is greater than the first dimension, is mixed with the matrix.
Claims21
An air seal for use with rotating parts in a gas turbine engine, wherein said air seal comprises;
- a matrix of agglomerated fine hexagonal boron nitride powder, the particles of which having a first dimension and of a fine metallic alloy powder, the particles of which having a second dimension, and
- an hexagonal boron nitride powder, the particles of which having a third dimension that is greater than said first dimension, wherein said hexagonal boron nitride powder is mixed with said matrix.
A gas turbine engine comprising;
- relatively rotating parts,
- an air seal disposed between relatively rotating parts, wherein said air seal includes;
- a matrix of agglomerated fine hexagonal boron nitride powder, the particles of which having a first dimension and of a fine metallic alloy powder, the particles of which having a second dimension, and
- an hexagonal boron nitride powder, the particles of which having a third dimension that is greater than said first dimension, wherein said hexagonal boron nitride powder is mixed with said matrix.
A method of creating an air seal on a gas turbine engine part comprises;
- agglomerating a matrix of fine hexagonal boron nitride powder, the particles of which having a first dimension and of a fine metallic alloy powder, the particles of which having a second dimension, and
- mixing with said matrix an hexagonal boron nitride powder, the particles of which having a third dimension that is greater than said first dimension.
Dependencies are inferred from the claim text.