公开(公告)号：US20180370862A1

公开(公告)日：2018-12-27

申请号：US15744480

申请日：2016-08-17

Applicant: General Electric Company

Inventor： Glen Harold KIRBY ,  Julin WAN ,  Sivakumar RAMASAMY

IPC: C04B41/50 ,  C04B41/87 ,  C04B41/00 ,  C04B41/45 ,  F01D5/28 ,  C23C4/11 ,  C23C4/134 ,  C23C4/18

Abstract: A coated substrate is provided that includes an environmental barrier coating on (e.g., directly on) a surface of a substrate (e.g., a ceramic matrix composite). The environmental barrier 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 (e.g., a breathable grain boundary of the barrier layer), or may be a plurality of discontinuous layers dispersed throughout the refractory material phase. The refractory material phase can include a rare earth silicate material having a rare earth component at a first atomic percent, while the silicon-containing glass phase comprises the rare earth component at a second atomic percent that is less than the first atomic percent. Methods are also provided for forming a barrier layer on a substrate.