Abstract: A method of fabricating a ceramic component includes initially partially filling pores of a porous structure using one of a first processing technique or a second, different processing technique to form a preform body with residual porosity. The first processing technique produces a first ceramic material in the pores of the porous structure and a second processing technique produces a second ceramic material in the pores of the porous structure. When the first processing technique is used to initially partially fill the pores of the porous structure, the second processing technique is used thereafter to at least partially fill the residual porosity with the second ceramic material. When the second processing technique is used to initially partially fill the pores, the first processing technique is used thereafter to at least partially fill the residual porosity.

Abstract: A method of manufacturing a composite article includes pyrolyzing a preceramic polymer to form a non-oxide ceramic matrix and a byproduct, and reacting the refractory material with the byproduct to form a refractory phase within the non-oxide ceramic matrix.

Abstract: A composition for manufacturing a composite of a non-oxide ceramic matrix and a refractory phase within the non-oxide ceramic matrix includes a preceramic polymer for forming a non-oxide ceramic matrix and a refractory material dispersed within the preceramic polymer.

Abstract: Components with improved erosion resistance are disclosed. A surface of the component or a substrate of the component is modified by coating the substrate with an elastomer layer. The elastomer layer is then modified by embedding hard particles onto an outer side of the elastomer layer. The hard particles exhibit higher fractured toughness providing enhanced erosion protection. The elastic properties of the elastomer experience little reduction because the surface embedded particles are located only at the outer side or outer surface of the elastomer layer. Therefore, the bond between the inner side of the elastomer layer and the substrate or component surface is not interfered with and the potential for electro-chemical corrosion and poor adhesion are not increased by the presence of the hard particles as the hard particles are located away from the inner face between the elastomer layer and the substrate.

Abstract: A single-source precursor composition includes R3B.NX3, where B is boron, N is nitrogen, and the R groups and the X groups are selected from hydrogen, alkyl groups, and aryl groups. At least one of the R groups is an alkyl group or an aryl group.

Abstract: A composite article includes a substrate, at least one protective layer on the substrate and an intermediate layer between the at least one protective layer and the substrate. The intermediate layer includes dense silicon oxycarbide.

Abstract: A composite article includes a substrate, at least one protective layer on the substrate, and an intermediate layer between the protective layer and the substrate. The intermediate layer includes a first material that occupies a first continuous region and a second material that occupies a second continuous region next to the first continuous region. The first continuous region and the second continuous region are each in contact with the substrate and the protective layer.

Abstract: A composite article includes a substrate and a protective layer on the substrate. The protective layer includes a non-oxide ceramic matrix and a refractory phase within the non-oxide ceramic matrix.

Abstract: A photocatalyst system for volatile organic compounds with two parts that include a photocatalyst layer on a substrate and a porous overlayer. The photocatalyst layer is reactive with volatile organic compounds when UV light is projected on it. The overlayer is situated on the photocatalyst layer. The overlayer is UV transparent and has an interconnected pore network that allows contaminated air to pass through the overlayer. The size and the shape of the interconnected pores acts to selectively exclude certain contaminants that can deactivate the photocatalyst.

Abstract: A gas treatment system for treating a gas stream containing contaminants includes first and second gas treatment members in fluid communication with each other. Each of the first and second gas treatment members is selectively controllable between an on and an off condition. A third gas treatment member is in fluid communication with the first and second gas treatment members, and the third gas treatment member selectively retains or releases the contaminants based upon the on or off condition of at least one of the first or second gas treatment members.

Abstract: A device for use in a fluid system includes a fuel channel for receiving fuel having dissolved gas therein. A gas permeable membrane supported by a porous support, the gas permeable membrane in communication with the fuel channel. A gas-removal channel adjacent the gas permeable membrane for receiving the dissolved gas from the fuel through the gas permeable membrane and the porous support.

Abstract: A refractory ceramic composite for an armor shell, comprising a ceramic core that is formable to replicate a portion of a three dimensional surface, e.g., of an aircraft, to provide ballistic protection. A method of making a shell of refractory ceramic armor capable of conforming to the geometry is provided. The shell is formed by forming a mold to replicate the surface area; arranging a ceramic core on the mold; and removing the mold to leave said ceramic core, and heat treating the ceramic core to a desired hardness. The ceramic core is in the shape of the surface area.

Abstract: A coated article includes a substrate and a superhydrophobic coating on the substrate. The superhydrophobic coating is a composite of a silicone polymer and particles that are inherently hydrophobic or surface-functionalized with a hydrophobic agent.

Abstract: A refractory ceramic composite for an armor shell, comprising a ceramic core that is formable to replicate a portion of a three dimensional surface, e.g., of an aircraft, to provide ballistic protection. A method of making a shell of refractory ceramic armor capable of conforming to the geometry is provided. The shell is formed by forming a mold to replicate the surface area; arranging a ceramic core on the mold; and removing the mold to leave said ceramic core, and heat treating the ceramic core to a desired hardness. The ceramic core is in the shape of the surface area.

Abstract: A composite article includes a substrate and a protective coating on at least a portion of the substrate. The protective coating includes reinforcement particles dispersed within an elastomeric matrix that is modified with a silicon-containing modifier selected from polysilsesquioxane, polyhedral oligomeric silicate and polyhedral oligomeric silsesquioxane (POSS).

Abstract: A refractory ceramic composite for an armor shell, comprising a ceramic core that is formable to replicate a portion of a three dimensional surface, e.g., of an aircraft, to provide ballistic protection. A method of making a shell of refractory ceramic armor capable of conforming to the geometry is provided. The shell is formed by forming a mold to replicate the surface area; arranging a ceramic core on the mold; and removing the mold to leave said ceramic core, and heat treating the ceramic core to a desired hardness. The ceramic core is in the shape of the surface area.

Abstract: A fuel cell includes an electrode assembly having an electrolyte between a cathode catalyst and an anode catalyst, and a flow field plate having a channel for delivering a reactant gas to the electrode assembly. The flow field plate includes a channel having a channel inlet. A porous diffusion layer is located between the electrode assembly and the flow field plate. The porous diffusion layer includes a first region near the channel inlet and a second region downstream from the first region relative to the channel inlet. The first region includes a filler material that partially blocks pores of the first region such that the first region has a first porosity and the second region has a second porosity that is greater than the first porosity.

Abstract: The present disclosure relates to a fluid purification device that has a deactivation resistant photocatalyst having nanocrystallites of less than 14 nanometers (nm) in diameter with at least 200 m2 surface area/cm3 of skeletal volume in cylindrical pores of 5 nm in diameter or larger, with the mode of the pore size distribution 10 nm or more.

Abstract: A method of and system for repairing the sheaves (24) in an elevator system has these steps. The ropes (22) associated with the sheave are removed, the sheave is cleaned, and a coating (24) is deposited on the cleaned surface. The coating is adapted to reduce the wear coefficient of the surface of the coated sheave by about 80% to 90% with respect to the sheave without a coating. The thickness of the coated sheave is adjusted to produce a specified sheave diameter.

Abstract: A method of fabricating a composite powder includes forming a plurality of loose particles having discrete regions of a first material and discrete regions of a second material that is different than the first material. At least one of the first material and the second material includes a chemical precursor to a third, different material.