Adaptive surface texturing for ceramic matrix composites
AssigneeRtx Corporation
InventorsZhigang Wang, Xia Tang, James T. Beals, Gajawalli V. Srinivasan, John D. Riehl, Brian T. Hazel, David A. Litton
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Abstract
An adaptive surface texturing method is provided for use with a part formed of ceramic matrix composites (CMCs) to be coated with an environmental barrier coating (EBC). The method includes coating a CMC surface of the part with an initial coating, determining a contour and an undulation pattern of the CMC surface and designing a texturing pattern to follow the contour and the undulation pattern and to be formed in the initial coating based on a thickness of the initial coating and an average particle size of a slurry of the EBC.
Claims20
An adaptive surface texturing method for use with a part formed of ceramic matrix composites (CMCs) to be coated with an environmental barrier coating (EBC), the method comprising:
- coating a CMC surface of the part with an initial coating, the CMC surface comprising fibers that are woven together;
- determining a macroscopic contour and microscopic undulation pattern of the CMC surface, the microscopic undulation pattern being formed by the fibers that are woven together;
- and
- designing a texturing pattern to follow the macroscopic contour and the microscopic undulation pattern of the CMC surface and to be formed in the initial coating based on a thickness of the initial coating and an average particle size of a slurry of the EBC.
An adaptive surface texturing method for use with a part formed of ceramic matrix composites (CMCs) to be coated with an environmental barrier coating (EBC), the method comprising:
- completing a formation of the part and a chemical vapor infiltration (CVI) process to initially coat a CMC surface thereof with an initial coating, the CMC surface comprising fibers that are woven together;
- determining a macroscopic contour and aft microscopic undulation pattern of the CMC surface, the microscopic undulation pattern being formed by the fibers that are woven together;
- and
- designing a texturing pattern to follow the macroscopic contour and the microscopic undulation pattern of the CMC surface and to be formed in the initial coating based on a thickness of the initial coating and an average particle size of a slurry of the EBC.
A ceramic matrix composite (CMC) surface of a part having a macroscopic contour formed of CMCs;
- the CMC surface comprising:
- fibers weaved with one another to form a microscopic undulation pattern;
- an initial coating having a texturing pattern formed therein;
- and
- an environmental barrier coating (EBC) applied to the initial coating,
- wherein the texturing pattern follows the macroscopic contour and the microscopic undulation pattern of the CMC surface and comprises grooves which are shallower than a thickness of the initial coating and which have a critical dimension that exceeds an average particle size of a slurry of the EBC.
Dependencies are inferred from the claim text.