Abstract: A method of depositing a hard, fine grained metal or semi-metal alloy is described wherein a volatile halide of the metal or semi-metal is partially reduced and then deposited as a liquid phase intermediate compound onto a substrate in the presence of an alloying gas. The liquid phase deposited on the substrate is then thermochemically reacted to produce the hard, fine grained alloy. Also described are products which may be produced by the above method.

Abstract: A heat resistant, structurally stable member is provided for in high temperature, heat treatment processing. It includes a core which has a high melting point higher than the processing temperature but which crystallizes, and so becomes frangible, at temperatures lower than the processing temperature. It is encased in a covering of a weldable, non-crystallizing alloy which may begin to soften at lower than processing temperatures, but is thick enough to be welded and to prevent loss of strength of the core due to crystalline shattering. Consequently, this structural member retains rigidity during high temperature usage.A plurality of structural members are welded together to form racks or baskets for holding parts during heat treatment in high temperature processing.

Abstract: A protective layer of tungsten or molybdenum is tightly adhered via an intermediate layer of pure nickel to a substratum of nickel-base alloy containing a carbide-former. The protected substratum is used in the structural components for a helium cooling circuit of a high temperature nuclear reactor. The protective layer is of a thickness of from 0.5 to 0.2 millimeters while the intermediate layer is of a thickness of 0.01 to 0.05 millimeters.

Abstract: A low overvoltage cathode is disclosed which has a metal substrate plated with a porous coating of dendritic copper which is in turn plated with a low overvoltage metal alloy. The substrate is preferably copper and the low overvoltage alloy is preferably a Ni-Mo alloy.

Abstract: An article of manufacture having improved high temperature oxidation and corrosion resistance comprising: (a) a superalloy substrate containing a carbide reinforcing phase, and (b) a coating consisting of chromium, aluminum, carbon, at least one element selected from iron, cobalt or nickel, and optionally an element selected from yttrium or the rare earth elements.

Abstract: A low-current contact structure formed on a contact member or substrate of various layers is described. A layer of refractory material is connected via a layer of easily diffusive metal with a layer of noble metal through diffusion annealing.

Abstract: A composite superconductor having both filamentary and film conductors for carrying the pure and impure components of direct current, respectively, or for alternating current, is disclosed, together with a method of making it, and a preferred arrangement for its use in high power transmission lines.

Abstract: A coating of zirconium is bonded to niobium by applying to the niobium a paint of Mo and Zr powder which is fired above 1520.degree. C but below the zirconium-niobium liquidus temperature of 1740.degree. C. Such coating is used in making an improved seal by juxtaposing the metal body to the ceramic body, applying a powdered alumina sealing glass or frit and firing to the melting temperature of the frit.

Abstract: A process for making thin film resistor terminals is described. Terminal fabrication is accomplished by the steps of chemical plating onto the terminal forming surfaces of the resistor and thereafter heat treating between 300.degree. and 800.degree. C in the vacuum, non-oxidation gas or non-oxidation atmosphere or in the air, oxidation gas or oxidation atmosphere. The chemical plating is of nickel, cobalt or nickel-cobalt alloy.

Abstract: A turbine blade includes a core made of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto the core. The cover forms a gas-tight metallurgical bond with the core and has great strength, high ductility and a uniform layer thickness. The process includes the steps of preshaping a core of highly heat-resistant material and fitting the preshaped core into a substantially preshaped, corrosion-resistant and highly heat-resistant cover. The cover is welded to the core at a point which during later use is subjected only to little stress to form a vacuum-tight seal and workpiece. The workpiece is heated in a pressure vessel to a temperature of at least 1000.degree. C, and the cover of the heated workpiece is heat-welded to the core by isotactic hot-pressing without the formation of pores.

Abstract: This relates to a multi-layer composite metallic sheet having a predetermined coefficient of thermal expansion for use as a heat sink and mounting arrangement when bonded to a ceramic substrate. Since copper has a coefficient of thermal expansion greater than that of ceramic and molybdenum has a coefficient of thermal expansion less than that of ceramic, layers of copper and molybdenum can be combined to provide a composite having a coefficient of thermal expansion equal to that of ceramic. To avoid a bimetallic effect, a core layer of a fused metal is sandwiched between two outer layers of the second metal.