CPC C04B 35/80 (2013.01) [C04B 35/571 (2013.01); C04B 35/589 (2013.01); C04B 35/6269 (2013.01); C04B 35/62842 (2013.01); C04B 35/62844 (2013.01); C04B 35/76 (2013.01); C04B 41/81 (2013.01); C04B 41/85 (2013.01); C04B 41/88 (2013.01); C04B 2235/3891 (2013.01); C04B 2235/40 (2013.01); C04B 2235/404 (2013.01); C04B 2235/408 (2013.01); C04B 2235/421 (2013.01); C04B 2235/48 (2013.01); C04B 2235/483 (2013.01); C04B 2235/522 (2013.01); C04B 2235/5244 (2013.01); C04B 2235/5248 (2013.01); C04B 2235/5252 (2013.01); C04B 2235/5268 (2013.01); C04B 2235/616 (2013.01); C04B 2235/6584 (2013.01); C04B 2235/80 (2013.01); C04B 2235/9607 (2013.01); Y10T 428/24997 (2015.04); Y10T 428/249967 (2015.04); Y10T 428/249969 (2015.04)] | 10 Claims |
1. A ceramic article comprising:
a ceramic matrix composite including a porous reinforcement structure and a ceramic matrix within pores of the porous reinforcement structure, the ceramic matrix composite including a surface zone comprised of an exterior surface of the ceramic matrix composite and pores that extend from the exterior surface into the ceramic matrix composite;
a glaze material sealing the surface zone within the pores of the surface zone and on the exterior surface of the surface zone as an exterior glaze layer on the ceramic matrix composite, wherein the glaze material is a glass-ceramic material, and the ceramic matrix composite including an interior zone under the surface zone, the interior zone being free of any of the glaze material and having a greater porosity than the surface zone;
wherein the glaze material defines a distinct border between the interior zone that has no glaze material and the surface zone that has the glaze material; and
wherein the glaze material comprises a glass-ceramic material that includes at least one rare earth metal from La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, including Sc, Y, and Hf, and combinations thereof.
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