| abstract |
A coated substrate is provided that includes an environmental resistant coating that is (eg, directly) on the surface of the substrate (eg, a ceramic matrix composite). The environmental resistant coating can include a barrier layer having a refractory material phase and a silicon-containing glass phase. The silicon-containing glass phase may be a continuous phase within the barrier layer (eg, the breathable grain boundary of the barrier layer) or a plurality of discontinuous layers dispersed throughout the refractory phase. The refractory phase can include a rare earth silicate material having a rare earth component at a first atomic percentage, while the silicon-containing glass phase contains a rare earth component at a second atomic percentage that is less than the first atomic percentage. Including. A method for forming a barrier layer on a substrate is also provided. [Selection] Figure 1 |