Turbine blade tip treatment for industrial gas turbines
AssigneeUnited Technologies Corporation
InventorChristopher W. Strock
Life of this patent
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Abstract
A method of preventing transfer of metal of a gas turbine rotor blade having a metal tip to a blade outer air seal coating on a gas turbine case includes forming a coating on the metal tip. The coating comprises a bond coat layer on the metal tip and a ceramic filled metallic layer having a ceramic component in a matrix of a metal MCr, MCrAl, MCrAlY or a refractory modified MCrAlY where M is nickel, cobalt, iron or mixtures thereof.
Claims9
A method of preventing transfer of metal of a gas turbine rotor blade having a metal tip to a blade outer air seal coating, comprising:
- a blade outer air seal coating on a gas turbine case;
- and
- a coating on the metal tip, the coating comprising a ceramic filled metallic layer having a ceramic component in a matrix of a metal;
- wherein the ceramic component is selected from the group consisting of silica, quartz, alumina, zirconia and mixtures thereof and the metal is selected from the group consisting of MCr, MCrAl, MCrAlY or a refractory modified MCrAlY where M is nickel, cobalt, iron or mixtures thereof.
A rotor and blade seal coating preventing transfer of metal of a gas turbine rotor blade having a metal tip to a blade outer air seal coating, comprising:
- a blade outer air seal coating on a gas turbine case;
- and
- a coating on the metal tip, the coating comprising a ceramic filled metallic layer having a ceramic component in a matrix of a metal;
- wherein the ceramic component is selected from the group consisting of silica, quartz, alumina, zirconia and mixtures thereof and the metal is selected from the group consisting of MCr, MCrAl, MCrAlY or a refractory modified MCrAlY where M is nickel, cobalt, iron or mixtures thereof.
In a gas turbine engine having a plurality of rotor blades having a metal tip and a blade outer air seal coating, comprising:
- a blade outer air seal coating on a gas turbine case;
- and
- a coating on the metal tip, the coating comprising a ceramic filled metallic layer;
- wherein the ceramic component is selected from the group consisting of silica, quartz, alumina, zirconia and mixtures thereof and the metal is selected from the group consisting of MCr, MCrAl, MCrAlY or a refractory modified MCrAlY where M is nickel, cobalt, iron or mixtures thereof.
Dependencies are inferred from the claim text.