| 摘要 |
Components (101) are disclosed which include a CMC substrate (103) having a first surface (105) and a second surface (107). The first surface (105) is in fluid communication with a compressed, dry fluid (109), and the second surface (107) is in fluid communication with a wet fluid stream (111) and includes a hermetic coating (113). The components (101) further include at least one opening (201) extending from the first surface (105) through a portion (203) of the CMC substrate (103), wherein, upon removal of a fragment of one or both of the hermetic coating (113) and the CMC substrate (103), the at least one opening (201) selectively permits a flow (303) of the compressed, dry fluid (109) to the second surface (107). In one embodiment, the component (101) is a gas turbine component, the wet fluid stream (111) is a hot combustion stream, the hermetic coating (113) is an environmental barrier coating (119), and the flow (303) reduces or eliminates volatilization of the CMC substrate (103). Methods for forming the components (101) are also disclosed. |
