| 摘要 |
Process includes providing a silicide-containing bond coat layer overlying a silicon-containing substrate, optionally forming a silica scale layer adjacent to and overlying the bond coat layer by preoxidizing the bond coat layer, and providing an environmental barrier coating overlying the bond coat layer. The environmental barrier coating includes a corrosion resistant outer layer formed by reacting a metal source with the silica scale layer, if present, or with the silicide-containing substrate in the absence of the silica scale layer. The process may include providing a thermal barrier coating overlying the corrosion resistant outer layer. The silicon-containing substrate may include at least a portion of a gas turbine engine component selected from a turbine blade, vane, and blisk. |
