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.

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.

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.

A process for preparing a coating utilized for thermal and environmental barrier coating on a substrate is disclosed. The process comprises preparing a starter oxycarbide composition; and preloading a metal material in said starter oxycarbide composition.

A process for preparing a coating utilized for thermal and environmental barrier coating on a substrate is disclosed. The process comprises preparing a starter oxycarbide composition; and preloading a metal material in said starter oxycarbide composition.

A process of coating a substrate containing silicon with an environmental barrier coating, comprising altering a surface of the substrate and applying an environmental barrier layer to the surface of the substrate.

A barrier coating system may include a super alloy or ceramic matrix composite (CMC) substrate underneath a bond coat. The barrier coating system may also include a calcium-magnesium aluminosilicate (CMAS) resistant coating configured to protect metallic, or oxide-based or silicon based components in a harsh CMAS environment.

A barrier layer for an article according to an exemplary embodiment of this disclosure, among other possible things includes a bond coat comprising a matrix, diffusive particles disposed in the matrix, and gettering particles disposed in the matrix. The composition of the gettering particles is a reaction product of the chemical reaction of Equation 1 defined by Equation 2:

[00001]$\begin{array}{cc}{\mathrm{Si}}_w{O}_x{C}_y{N}_z+?O_2=w\mathrm{Si}{O}_2+y\mathrm{CO}+\frac{z}{2}{N}_2& \mathrm{Equation}1\end{array}$$\begin{array}{cc}?=\frac{2w+y-x}{2}& \mathrm{Equation}2\end{array}$

A barrier layer is also disclosed.

A barrier layer for an article according to an exemplary embodiment of this disclosure, among other possible things includes a bond coat comprising a matrix, diffusive particles disposed in the matrix, and gettering particles disposed in the matrix. The composition of the gettering particles is a reaction product of the chemical reaction of Equation 1 defined by Equation 2:

[00001]$\begin{array}{cc}{\mathrm{Si}}_w{O}_x{C}_y{N}_z+?O_2=w\mathrm{Si}{O}_2+y\mathrm{CO}+\frac{z}{2}{N}_2& \mathrm{Equation}1\end{array}$$\begin{array}{cc}?=\frac{2w+y-x}{2}& \mathrm{Equation}2\end{array}$

A barrier layer is also disclosed.

A method of making a multilayer environmental barrier coating for a ceramic matrix composite is provided, comprising the steps of: plasma spray coating an oxide-based bond coat over top of the ceramic matrix composite and depositing a columnar top coat over the oxide-based bond coat.