Polymer-coated blade with abrasive tip
AssigneeUnited Technologies Corporation
InventorsChristopher W. Strock, Russell A. Beers
Life of this patent
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Abstract
A friction interface in a gas turbine engine includes an abradable component, such as a seal, and an abrasive component, such as a blade tip, in rubbing contact with each other. The abradable component is composed of a polymer matrix composite and the abrasive component is composed of a metal matrix with hard particles dispersed through the metal matrix. The metal matrix is an aluminum alloy and the hard particles are selected from oxides, nitrides, carbides, oxycarbides, oxynitrides, diamond and combinations thereof.
Claims20
A friction interface in a gas turbine engine, comprising:
- an abradable component and an abrasive component in rubbing contact with each other, the abradable component being composed of a polymer matrix composite and the abrasive component being composed of a metal matrix and hard particles dispersed through the metal matrix, and the metal matrix is an aluminum alloy and the hard particles are selected from the group consisting of oxides, nitrides, carbides, oxycarbides, oxynitrides, diamond and combinations thereof.
A friction interface in a gas turbine engine, comprising:
- an abradable seal and an abrasive tip in rubbing contact with each other, the abradable seal being composed of a polymer matrix composite and the abrasive tip being composed of a metal matrix and hard particles dispersed through the metal matrix, and the metal matrix is aluminum alloy and the hard particles are selected from the group consisting of oxides, nitrides, carbides, oxycarbides, oxynitrides, diamond and combinations thereof.
A blade comprising:
- an airfoil section extending between leading and trailing edges, first and second opposed sides each joining the leading and trailing edges, and an inner end and a free tip end,
- the airfoil section being formed of a metal-based material with a polymeric overcoat on at least one of the leading edge, trailing edge, first side and second side,
- the airfoil section including an abrasive tip at the free tip end,
- the abrasive tip including a metal matrix and hard particles dispersed through the metal matrix, and the metal matrix being composed of an aluminum alloy and the hard particles being selected from the group consisting of oxides, nitrides, carbides, oxycarbides, oxynitrides, diamond and combinations thereof.
Dependencies are inferred from the claim text.