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US 10,093,810 B2Granted
Composite coatings and methods therefor
AssigneeGeneral Electric Company
InventorsJulin Wan, Milivoj Konstantin Brun, Peter Joel Meschter, Reza Sarrafi-Nour, Don Mark Lipkin
Life of this patent
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Abstract
An article includes a substrate and a coating provided on a surface of the substrate. The coating includes at least one metal silicide layer consisting essentially of MoSi2 or WSi2 or (Mo, W)Si2 or a platinum group metal silicide and at least one layer consisting essentially of Si3N4.
Claims24
An article, comprising:
- a substrate;
- and
- a coating provided on a surface of the substrate, the coating comprising
- at least one metal silicide layer consisting essentially of MoSi2 or WSi2 or (Mo, W)Si2 or a platinum group metal silicide;
- and
- at least one layer consisting essentially of Si3N4, wherein a thickness ratio of the at least one metal silicide layer and the at least one layer of Si3N4 provides the coating with a coefficient of thermal expansion substantially equal to a coefficient of thermal expansion of the substrate.
3 more elements
An article, comprising:
- a substrate including a silicon-containing region that includes SiC, Si3N4, a transition metal silicide, and/or silicon as a reinforcement material in a metallic or a non-metallic matrix;
- and
- a coating provided on a surface of the substrate, the coating comprising MoSi2 and Si3N4, wherein a percentage of Si3N4 is greater than about 55% by volume of the coating, wherein a thickness ratio of the at least one metal silicide layer and the at least one layer of Si3N4 provides the coating with a coefficient of thermal expansion substantially equal to a coefficient of thermal expansion of the substrate.
An article, comprising:
- a substrate formed of a ceramic matrix composite that contains SiC as a reinforcement and a matrix phase;
- and
- a coating provided on a surface of the substrate, the coating comprising
- at least one metal silicide layer consisting essentially of MoSi2 or WSi2 or (Mo, W)Si2 or a platinum group metal silicide;
- and
- at least one layer consisting essentially of Si3N4, wherein a thickness ratio of the at least one metal silicide layer and the at least one layer of Si3N4 provides the coating with a coefficient of thermal expansion substantially equal to a coefficient of thermal expansion of the substrate.
3 more elements
An article, comprising:
- a substrate formed of a ceramic matrix composite that contains SiC as a reinforcement and a matrix phase;
- and
- a coating provided on a surface of the substrate, the coating comprising MoSi2 and Si3N4, wherein a percentage of Si3N4 is greater than about 55% by volume of the coating, wherein a thickness ratio of the at least one metal silicide layer and the at least one layer of Si3N4 provides the coating with a coefficient of thermal expansion substantially equal to a coefficient of thermal expansion of the substrate.
Dependencies are inferred from the claim text.