Materials for protection of substrates at high temperature, articles made therefrom, and method for protecting substrates
AssigneeGeneral Electric Company
InventorsJi-Cheng Zhao, Melvin Robert Jackson, Richard John Grylls, Ramgopal Darolia
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Abstract
A group of alloys suitable for use in a high-temperature, oxidative environment, a protective coating system comprising a diffusion barrier that comprises an alloy selected from the group, an article comprising the diffusion barrier layer, and a method for protecting an article from a high-temperature oxidative environment comprising disposing the diffusion barrier layer onto a substrate are presented.
Claims38
An alloy for use in a high-temperature, oxidative environment, comprising, in atomic percent:
- from about 20% to about 80% ruthenium (Ru);
- from about 2% to about 15% aluminum (Al);
- up to about 15% chromium (Cr);
- and
- the balance comprising at least one of nickel (Ni), cobalt (Co), and mixtures thereof.
An alloy for use in a high-temperature, oxidative environment, comprising, in atomic percent:
- at least about 80% ruthenium (Ru);
- from about 2% to about 20% aluminum (Al);
- up to about 20% chromium (Cr);
- and
- the balance comprising at least one of nickel (Ni), cobalt (Co), and mixtures thereof.
An alloy for use in a high-temperature, oxidative environment, comprising, in atomic percent:
- from about 60% to about 85% ruthenium (Ru);
- from about 15% to about 40% aluminum (Al);
- up to about 25% chromium (Cr);
- and
- up to about 25% of at least one of nickel (Ni), cobalt (Co), and mixtures thereof.
A protective coating system for protecting an article from a high-temperature, oxidative environment, said protective coating system comprising:
- a diffusion barrier layer comprising an alloy selected from the group consisting of
- a. an alloy comprising, in atomic percent, from about 20% to about 80% ruthenium (Ru), from about 2% to about 15% aluminum (Al), up to about 15% chromium (Cr), and the balance comprising at least one of nickel (Ni), cobalt (Co), and mixtures thereof;
- b. an alloy comprising, in atomic percent, at least about 80% Ru, from about 2% to about 20% Al, up to about 20% Cr, and the balance comprising at least one of Ni, Co, and mixtures thereof;
- c. an alloy comprising, in atomic percent, from about 60% to about 85% Ru, from about 15% to about 40% Al, up to about 25% Cr, and up to about 25% of at least one of Ni, Co, and mixtures thereof;
- and
- d. an alloy comprising, in atomic percent, from about 20% to about 45% Ru, from about 15% to about 40% Cr, from about 2% to about 50% Al, and the balance comprising at least one of Ni, Co, and mixtures thereof.
A protective coating system for protecting an article from a high-temperature, oxidative environment, said protective coating system comprising:
- a diffusion barrier layer comprising, in atomic percent, from about 20% to about 45% Ru, from about 15% to about 40% Cr, from about 2% to about 50% Al, and the balance comprising at least one of Ni, Co, and mixtures thereof;
- a layer of oxidation-resistant material, said material comprising an aluminide, disposed over said diffusion barrier layer;
- and
- a thermal barrier coating disposed over said layer of oxidation-resistant material.
An article for use in a high-temperature, oxidative environment, comprising:
- a substrate;
- and
- a diffusion barrier layer disposed on said substrate, said diffusion barrier layer comprising an alloy selected from the group consisting of
- a. an alloy comprising, in atomic percent, from about 20% to about 80% ruthenium (Ru), from about 2% to about 15% aluminum (Al), up to about 15% chromium (Cr), and the balance comprising at least one of nickel (Ni), cobalt (Co), and mixtures thereof;
- b. an alloy comprising, in atomic percent, at least about 80% Ru, from about 2% to about 20% Al, up to about 20% Cr, and the balance comprising at least one of Ni, Co, and mixtures thereof;
- c. an alloy comprising, in atomic percent, from about 60% to about 85% Ru, from about 15% to about 40% Al, up to about 25% Cr, and up to about 25% of at least one of Ni, Co, and mixtures thereof;
- and
- d. an alloy comprising, in atomic percent, from about 20% to about 45% Ru, from about 15% to about 40% Cr, from about 2% to about 50% Al, and the balance comprising at least one of Ni, Co, and mixtures thereof.
A gas turbine engine component comprising:
- a substrate comprising a gas turbine engine component, said component comprising a nickel-based superalloy;
- a diffusion barrier layer disposed over said substrate, said diffusion barrier layer comprising an alloy comprising, in atomic percent, from about 20% to about 45% Ru, from about 15% to about 40% Cr, from about 2% to about 50% Al, and the balance comprising at least one of Ni, Co, and mixtures thereof;
- a layer of oxidation-resistant material, said material comprising an aluminide, disposed over said diffusion barrier layer;
- and a thermal barrier coating disposed over said layer of oxidation-resistant material.
A method for protecting an article from exposure to a high-temperature, oxidative environment, said method comprising:
- providing a substrate;
- and
- disposing a diffusion barrier layer on said substrate, said diffusion barrier layer comprising an alloy selected from the group consisting of
- a. an alloy comprising, in atomic percent, from about 20% to about 80% ruthenium (Ru), from about 2% to about 15% aluminum (Al), up to about 15% chromium (Cr), and the balance comprising at least one of nickel (Ni), cobalt (Co), and mixtures thereof,
- b. an alloy comprising, in atomic percent, at least about 80% Ru, from about 2% to about 20% Al, up to about 20% Cr, and the balance comprising at least one of Ni, Co, and mixtures thereof,
- c. an alloy comprising, in atomic percent, from about 60% to about 85% Ru, from about 15% to about 40% Al, up to about 25% Cr, and up to about 25% of at least one of Ni, Co, and mixtures thereof, and
- d. an alloy comprising, in atomic percent, from about 20% to about 45% Ru, from about 15% to about 40% Cr, from about 2% to about 50% Al, and the balance comprising at least one of Ni, Co, and mixtures thereof.
A method for protecting a gas turbine engine component, said method comprising:
- providing a gas turbine engine component;
- disposing a diffusion barrier layer on said component, said diffusion barrier layer comprising an alloy comprising, in atomic percent, from about 20% to about 45% Ru, from about 15% to about 40% Cr, from about 2% to about 50% Al, and the balance comprising at least one of Ni, Co, and mixtures thereof;
- disposing a layer of oxidation-resistant material over said diffusion barrier layer, said oxidation-resistant material comprising an aluminide;
- and
- disposing a thermal barrier coating over said layer of oxidation-resistant material.
Dependencies are inferred from the claim text.