Coating processes – Coating by vapor – gas – or smoke – Carbon or carbide coating
Reexamination Certificate
2004-12-14
2010-02-23
Tran, Binh X (Department: 1792)
Coating processes
Coating by vapor, gas, or smoke
Carbon or carbide coating
C427S249300, C427S249400, C427S249150, C427S249160
Reexamination Certificate
active
07666475
ABSTRACT:
A method for forming interphase layers in ceramic matrix composites. The method forms interphase layers in ceramic matrix composites thereby enabling higher matrix densities to be achieved without sacrificing crack deflection and/or toughness. The methods of the present invention involve the use fugitive material-coated fibers. These fibers are then infiltrated with a ceramic matrix slurry. Then, the fugitive material is removed and the resulting material is reinfiltrated with an interphase layer material. The ceramic matrix composite is then fired. Additional steps may be included to densify the ceramic matrix or to increase the strength of the interphase layer. The method is useful for the formation of three dimensional fiber-reinforced ceramic matrix composites envisioned for use in gas turbine components.
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Siemens Energy Inc.
Tran Binh X
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