Advanced high temperature and fatigue resistant environmental barrier coating bond coat systems for SiC/SiC ceramic matrix composites
AssigneeThe United States of America as Represented by the Administrator of National Aeromautics and Space Administration
InventorsDongming Zhu, Janet B. Hurst
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Abstract
Advanced environmental barrier coating bond coat systems with higher temperature capabilities and environmental resistance are disclosed. These bond coat systems can be applied to ceramic substrates such as SiC/SiC ceramic matrix composite substrates, and can provide protection from extreme temperature, mechanical loading and environmental conditions, such as in high temperature gas turbines. Example bond coat systems can include either an advanced silicon/silicide component, an oxide/silicate component, or a combination thereof.
Claims14
An article, comprising:
- a substrate;
- and
- a bond coat system in contact with the substrate, wherein the bond coat system comprises a bond coat layer, and wherein the bond coat layer comprises a first component comprising a rare earth doped iron silicide and a second component comprising at least one oxide.
An article, comprising:
- a substrate;
- and
- a bond coat system in contact with the substrate, wherein the bond coat system comprises a first interlayer in contact with the substrate, a bond coat layer in contact with the first interlayer, and a second interlayer in contact with the bond coat layer, wherein the bond coat layer comprises a rare earth doped iron silicide and at least one oxide, wherein the bond coat comprises at least 40% silicon by atomic percentage.
Dependencies are inferred from the claim text.