US 11,739,027 B2
Method for fabricating a ceramic material
Paul Sheedy, Vernon, CT (US); Wayde R. Schmidt, Pomfret Center, CT (US); and Tania Bhatia Kashyap, West Hartford, CT (US)
Assigned to Raytheon Technologies Corporation, Farmington, CT (US)
Filed by United Technologies Corporation, Farmington, CT (US)
Filed on Feb. 14, 2020, as Appl. No. 16/791,119.
Application 15/618,874 is a division of application No. 13/859,093, filed on Apr. 9, 2013, granted, now 9,701,591, issued on Jul. 11, 2017.
Application 16/791,119 is a continuation of application No. 15/618,874, filed on Jun. 9, 2017, granted, now 10,562,825.
Application 13/859,093 is a continuation in part of application No. 13/271,294, filed on Oct. 12, 2011, granted, now 9,533,919, issued on Jan. 3, 2017.
Prior Publication US 2020/0181034 A1, Jun. 11, 2020
Int. Cl. C04B 35/80 (2006.01); C04B 41/81 (2006.01); C04B 41/88 (2006.01); C04B 41/85 (2006.01); C04B 35/571 (2006.01); C04B 35/589 (2006.01); C04B 35/626 (2006.01); C04B 35/628 (2006.01); C04B 35/76 (2006.01)
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
OG exemplary drawing
 
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.