Disclosed is a method of coating a high temperature fiber including depositing a base material on the high temperature fiber using atomic layer deposition, depositing an intermediate material precursor on the base material using molecular layer deposition, depositing a top material on the intermediate material precursor or the intermediate layer using atomic layer deposition, and heat treating the intermediate precursor. The intermediate material in the final coating includes a structural defect, has lower density than the top material or a combination thereof. Also disclosed are the coated high temperature fiber and a composite including the high temperature fiber.

A composite article comprises a substrate, the substrate comprising a silicon containing material and an additive comprising boron nitride nanotubes.

Disclosed is a method of coating a high temperature fiber including depositing a base material on the high temperature fiber using atomic layer deposition, depositing an intermediate material precursor on the base material using molecular layer deposition, depositing a top material on the intermediate material precursor or the intermediate layer using atomic layer deposition, and heat treating the intermediate precursor. The intermediate material in the final coating includes a structural defect, has lower density than the top material or a combination thereof. Also disclosed are the coated high temperature fiber and a composite including the high temperature fiber.

The present application relates to boron nitride nanotube (BNNT)-silicate glass composites and to methods of preparing such composites. The methods comprise mixing BNNTs that are coated with a glass former such as boron oxide with a silicate glass precursor to create a mixture; heating the mixture under conditions to obtain a molten silicate glass; and cooling the molten silicate glass under conditions to obtain the BNNT-silicate glass composite.

Disclosed is a method of coating a high temperature fiber including depositing a base material on the high temperature fiber using atomic layer deposition, depositing an intermediate material precursor on the base material using molecular layer deposition, depositing a top material on the intermediate material precursor or the intermediate layer using atomic layer deposition, and heat treating the intermediate precursor. The intermediate material in the final coating includes a structural defect, has lower density than the top material or a combination thereof. Also disclosed are the coated high temperature fiber and a composite including the high temperature fiber.

Composite materials are provided which include a glass-ceramic matrix composition that is lightly crystallized, a fiber reinforcement within the glass-ceramic matrix composition which remains stable at temperatures greater than 1400 C., and an interphase coating formed on the fiber reinforcement. A method of making a composite material is also provided, which includes applying heat and pressure to a shape including fiber reinforcements and glass particles. The heat and pressure lightly crystallize a matrix material formed by the heat and pressure on the glass particles, forming a thermally stable composite material.

Composite materials are provided which include a glass-ceramic matrix composition that is lightly crystallized, a fiber reinforcement within the glass-ceramic matrix composition which remains stable at temperatures greater than 1400 C., and an interphase coating formed on the fiber reinforcement. A method of making a composite material is also provided, which includes applying heat and pressure to a shape including fiber reinforcements and glass particles. The heat and pressure lightly crystallize a matrix material formed by the heat and pressure on the glass particles, forming a thermally stable composite material.

Composite nano- and micromaterials and methods of making and using same. The composite materials comprise crystalline materials (e.g., binary and ternary vanadium oxides) in an amorphous or crystalline material (e.g., oxide, sulfide, and selenide materials). The materials can be made using sol-gel processes. The composite materials can be present as a film on a substrate. The films can be formed using preformed composite materials or the composite material can be formed in situ in the film forming process. For example, films of the materials can be used in fenestration units, such as insulating glass units deployed within windows.

Nanocomposite ceramic or glass materials are disclosed herein, which include a matrix material and one or more nanostructures dispersed within the matrix material. The nanostructures may comprise one or more core-shell nanostructures including a core nanostructure and a shell material. The shell material may be different from the material making up the core nanostructure and may improve the wettability of the core-shell nanostructure, the dispersion of the core-shell nanostructure within the matrix material, or make the core-shell nanostructure more resistant to oxidation, when compared to the core nanostructure alone. Methods of making nanocomposite ceramic or glass materials are also disclosed herein.

The present application relates to boron nitride nanotube (BNNT)-silicate glass composites and to methods of preparing such composites. The methods comprise mixing BNNTs that are coated with a glass former such as boron oxide with a silicate glass precursor to create a mixture; heating the mixture under conditions to obtain a molten silicate glass; and cooling the molten silicate glass under conditions to obtain the BNNT-silicate glass composite.