This disclosure describes various configurations and components for bimetallic and trimetallic claddings for use as a wall element separating nuclear material from an external environment. The cladding materials are suitable for use as cladding for nuclear fuel elements, particularly for fuel elements that will be exposed to sodium or other coolants or environments with a propensity to react with the nuclear fuel.

A method for manufacturing a brake disc may have the following operating steps: a) preparing a brake disc, with a braking band and provided with two mutually opposite braking surfaces; b) depositing on the disc a layer of chromium carbide (Cr3C2) and nickel-chromium (NiCr) in particulate form forming a base protective coating; and c) depositing over the base protective coating a material in particulate form with the tungsten carbide (WC) and cobalt (Co) forming a surface protective coating. Both protective coatings are created with HVOF (High Velocity Oxygen Fuel), HVAF (High Velocity Air Fuel) or KM (Kinetic Metallisation) technique.

A gas turbine engine article includes a substrate and an environmental barrier coating disposed on the substrate. The environmental barrier coating includes oxygen-scavenging particles. Each oxygen-scavenging particle includes a silicon-containing core particle encased in an oxygen barrier shell.

A diffusion barrier coating on a nickel-based alloy substrate comprising the diffusion barrier being coupled to the substrate between the substrate and a composite material opposite the substrate, wherein the diffusion barrier comprises a nickel cobalt and chromium-aluminum-yttria powder material.

A diffusion barrier coating on a nickel-based alloy substrate comprising the diffusion barrier being coupled to the substrate between the substrate and a composite material opposite the substrate, wherein the diffusion barrier comprises a nickel phosphorus alloy material.

A hard film for coating a surface of a base material, the hard film includes a layer A, a layer B, and a nanolayer-alternating layer. The layer A is an AlTiCr nitride of (Al.sub.aTi.sub.bCr.sub.cα.sub.d)N, where α is one or more elements selected from C, B, Si, V, Y, Zr, Nb, Mo, Hf, Ta, and W. The layer B is an AlTiCr nitride or AlTiCr carbonitride of (Al.sub.eTi.sub.fCr.sub.gβ.sub.h)C.sub.xN.sub.1-X, where β is one or more elements selected from B, Si, V, Y, Zr, Nb, Mo, Hf, Ta, and W. The nanolayer-alternating layer is formed by alternately laminating a nanolayer A or a nanolayer B having the same composition as the layer A or B. And, the layer C is an AlCr(SiC) nitride or AlCr(SiC) carbonitride of [Al.sub.iCr.sub.j(SiC).sub.kγ.sub.l]C.sub.YN.sub.1-Y, where γ is one or more elements selected from B, Ti, V, Y, Zr, Nb, Mo, Hf, Ta, and W.

A method of forming an inverse opal structure along a substrate that includes depositing polymer spheres along the substrate and electroplating the substrate and spheres at a first current density to form a first solid metal layer such that the spheres are raised from the substrate. The method includes electroplating the substrate and the spheres at a second current density to diffuse metals from the substrate and deposit the metal about the spheres. The second current density is greater than the first current density. The method includes electroplating the substrate and spheres to form a second solid metal layer disposed over the spheres, and removing the spheres to form the inverse opal structure disposed between the first and second solid metal layers. The first and second solid metal layers define planar interface surfaces disposed over a porous structure of the inverse opal structure.

Embodiments disclosed herein relate to the production of a housing enclosure designed for sensors or RFIDS to be attached to thin-walled components in the oil and gas industries being sent downhole during drilling and extraction. A metal-based coating, which may be crystalline, amorphous, or partially amorphous in structure, is deposited onto a substrate in layers via thermal spraying. The coating may then be machined so that an opening is created to receive the sensor or RFID. The coating may also provide other functions such as wear, corrosion or erosion protection to the thin-walled components applied.

A valve including a surface movably engaged with another surface. A coating is on the surface. The surface can have a CoF of less than 0.1; a hardness in excess of 1,200 HVN; impermeability to liquids at pressures ranging from 15 and 20,000 psi; a surface finish of 63 or less; and a thickness ranging from 0.5 to 20 mils.

Apparatuses and methods of manufacturing of thermally formed composite structures, such as a projectile firing structure, are provided. One simplified exemplary method includes: determining material properties of a projectile firing structure comprising a rifled barrel including thermal conductivity, wear, and tensile strength; wrapping a plurality of thermally reactive layers onto a cylindrical press form structure, the cylindrical press form structure comprising a plurality of spiraled grooves and lands, the thermally reactive layers comprising metal or metal oxides that when heated produce thermal diffusion byproducts in a composite structure forming the rifled barrel having the plurality of material properties; disposing an enclosing structure around the thermally reactive layers wrapped around the cylindrical press form structure; and heating the plurality of thermally reactive layers at a temperature and time so that the plurality of thermally reactive layers thermally react via thermal diffusion forming the rifled barrel having the plurality of material properties.