Methods for repairing composite component voids are provided. For example, one method comprises locating a void in a composite component and subjecting the composite component to a process for repair. The process for repair includes creating a flow path through the void, applying a filler material to the composite component at the flow path, and processing the composite component having the filler material. In some embodiments, the flow path has a first opening on a first side of the composite component and a second opening on a second, opposite side of the composite component. In other embodiments, at least one portion of the flow path extends at a first angle with respect to a lateral direction defined by the CMC component, and at least another portion extends at a second angle with respect to the lateral direction.

Methods for repairing composite component voids are provided. For example, one method comprises locating a void in a composite component and subjecting the composite component to a process for repair. The process for repair includes creating a flow path through the void, applying a filler material to the composite component at the flow path, and processing the composite component having the filler material. In some embodiments, the flow path has a first opening on a first side of the composite component and a second opening on a second, opposite side of the composite component. In other embodiments, at least one portion of the flow path extends at a first angle with respect to a lateral direction defined by the CMC component, and at least another portion extends at a second angle with respect to the lateral direction.

A method for making an article comprising silicon carbide. The method includes producing an article including silicon carbide via additive manufacturing. The method further includes heating via at least one laser beam in a site-selective and locally limited manner a surface of the article so as to cause at least one of ablation and chemical modification of the surface.

A method for making an article comprising silicon carbide. The method includes producing an article including silicon carbide via additive manufacturing. The method further includes heating via at least one laser beam in a site-selective and locally limited manner a surface of the article so as to cause at least one of ablation and chemical modification of the surface.

Provided are ceramic foams. The ceramic foams may have a hierarchical pore gradient. The ceramic foams may be silica aerogels. The ceramic foams may be made by reaction of one or more precursors in the presence of an inert gas generated by a pore-forming gas-forming additive. The ceramic foams may be used as insulating materials.

Provided are ceramic foams. The ceramic foams may have a hierarchical pore gradient. The ceramic foams may be silica aerogels. The ceramic foams may be made by reaction of one or more precursors in the presence of an inert gas generated by a pore-forming gas-forming additive. The ceramic foams may be used as insulating materials.

Methods for repairing composite component voids are provided. For example, one method comprises locating a void in a composite component and subjecting the composite component to a process for repair. The process for repair includes creating a flow path through the void, applying a filler material to the composite component at the flow path, and processing the composite component having the filler material. In some embodiments, the flow path has a first opening on a first side of the composite component and a second opening on a second, opposite side of the composite component. In other embodiments, at least one portion of the flow path extends at a first angle with respect to a lateral direction defined by the CMC component, and at least another portion extends at a second angle with respect to the lateral direction.

Methods for repairing composite component voids are provided. For example, one method comprises locating a void in a composite component and subjecting the composite component to a process for repair. The process for repair includes creating a flow path through the void, applying a filler material to the composite component at the flow path, and processing the composite component having the filler material. In some embodiments, the flow path has a first opening on a first side of the composite component and a second opening on a second, opposite side of the composite component. In other embodiments, at least one portion of the flow path extends at a first angle with respect to a lateral direction defined by the CMC component, and at least another portion extends at a second angle with respect to the lateral direction.

Aspects of the disclosure provide methods of making a coated filtration material. Various methods include providing a base filter material and applying a first coating to the base filter material, the first coating being in nanoparticle form. A second coating is applied on top of the first coating, the second coating being a nanoscale inorganic material. The method further includes removing the first coating in such a way that the second coating remains on the base filter material. Methods of the disclosure can be used to manufacture coated filtration materials having a coating with a porosity of 90% or greater and a pore size in the range of 0.1-0.5 μm.

Aspects of the disclosure provide methods of making a coated filtration material. Various methods include providing a base filter material and applying a first coating to the base filter material, the first coating being in nanoparticle form. A second coating is applied on top of the first coating, the second coating being a nanoscale inorganic material. The method further includes removing the first coating in such a way that the second coating remains on the base filter material. Methods of the disclosure can be used to manufacture coated filtration materials having a coating with a porosity of 90% or greater and a pore size in the range of 0.1-0.5 μm.