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 making a metal wire adapted for wire electrical discharge machining, comprises the steps of: A. Preparing a brass core wire having a diameter of at least 1.2 mm and having a zinc content of less than 40% by weight; B. Plating at least a coating material of zinc alloy having a zinc content of more than 75% by weight on the brass core wire to form a coating layer on the core wire so as to form a coarse wire by a spray plating process by atomizing and depositing a plurality of zinc alloy particles of the coating material on at least a surface portion of the brass core wire to form a plurality of cleavages or cavities on or in an outer surface of the coating layer of the coarse wire; and C. Drawing or stretching the coarse wire to obtain a metal wire product having a diameter ranging from 0.15 mm through 0.35 mm.

The purpose of the present invention is to provide a method for causing sufficient deformation in precursor particles even when a soft high-purity metal is used for an outer layer material in mechanical milling, and manufacturing an MgB.sub.2 superconducting wire. A method for manufacturing an MgB.sub.2 superconducting wire in which an MgB.sub.2 filament is covered by an outer layer material, the method comprising: subjecting magnesium powder and boron powder to a shock that is insufficient for MgB.sub.2 to be clearly produced, and producing precursor particles in which boron particles are dispersed inside a magnesium matrix; filling a metal tub with the precursor particles; processing the metal tube filled with precursor particles to form a wire; and heat-treating the wire to synthesize the MgB.sub.2; wherein the method is characterized in that a portion of the wire-drawing step includes swaging.

A process to fabricate ultra-fine grain metal wire, comprising: inserting a plurality of metal strands into a flexible elastic polyurethane sheath having an accommodating slot for each of the strands of metal to form a sheathed strand assembly; equal channel angular pressing (ECAP pressing) the sheathed strand assembly through an ECAP die having a plurality of die channels corresponding to the plurality of metal strands. The process is designed to improve electric conductance and mechanical properties of elongated metal parts and is especially applicable to optimize the conductance and tensile strength of copper cables, wires, strings, and rods.

Disclosed is a method of manufacturing a fine wire suitable for speedy and small quantity production of a fine wire having a desired cross-sectional area at low cost without being restricted much by a material. The method includes: stacking a metal powder on an upper surface of a molding plate in which a plurality of semicircular molding grooves are formed in parallel; melting the metal powder by projecting a laser beam onto the metal powder stacked on the upper surface of the molding plate, wherein the laser beam is projected along the molding grooves to melt the metal powder; and removing the remaining metal powder when the melted metal powder is solidified so that a wire is formed in the molding grooves of the molding plate.

The invention relates to a method for coaxially extruding an extruded product. Hereby, an extruding device comprises the following: a receiver (7); a first receiver bore (5) which is formed in the receiver (7) and in which a first punch (10) is arranged; a second receiver bore (6) which is formed in the receiver (7) inside the first receiver bore (5) and coaxially therewith and in which a second punch (11) is arranged; and a mold (15) having a mold cavity (14) which is connected to the first and the second receiver bore (5, 6). In the method, the following is provided: arranging a first material billet (8) of a first material (2) in the first receiver bore (5); arranging a second material billet (9) of a second material (3) in the second receiver bore (6); and extruding an extruded product (1) in which the first and the second material (2, 3) are connected in a form-fitting and integrally bonded manner. The extrusion comprises: advancing the first punch (10) in the first receiver bore (5) in such a manner that the first material (2) is pressed into the mold cavity (14) of the mold (15) and thereby shaped; advancing the second punch (11) in the second receiver bore (6) in such a manner that the second material (3) is pressed into the mold cavity (14) of the mold (15) and thereby shaped, the second punch (11) being displaced coaxially with the first punch (10); and connecting the first and the second material in an integrally bonded and form-fitting manner to form an extruded product (1) in the mold (15) in such a manner that the first material (2) surrounds the second material (3) in the extruded product (1). The invention also relates to a device for coaxially extruding an extruded product.

An electrode wire for electro-discharge machining includes a core wire including a first metal including copper and having one of phases , +, and , a first alloy layer formed at a boundary region between the core wire and a second metal plated on an outer surface of the core wire due to mutual diffusion between the core wire and the second metal and having a phase , and a second alloy layer formed due to diffusion of the first metal to the second metal and having a phase and/a phase . A core wire material is erupted onto a surface of the electrode wire for electro-discharge machining, which includes the core wire, the first alloy layer, and the second alloy layer, along cracks appearing on the second alloy layer, so that a plurality of grains are formed on the surface of the electrode wire.

Disclosed are a metal wire, a manufacturing method therefor, and a tire. The metal wire is made by twisting a filament; an outer peripheral surface of the filament is covered with a CuMZn alloy coating; the outer peripheral surface of the filament is also covered with a CuZn alloy coating; the metal wire is made of at least one filament; an area covered by the CuMZn alloy coating is 10%-90% of an area of the outer peripheral surface of the filament, and the rest is the CuZn alloy coating; M in the CuMZn alloy coating is selected from one or two of Co, Ni, Mn, or Mo; the mass fraction of Cu in the CuMZn alloy coating is 58%-72%, the mass fraction of M in the CuMZn alloy coating is 0.5%-5%, and the balance in the CuMZn alloy coating is Zn and inevitable impurities.

A composite object for the production of hydrogen from water-reactive aluminum may include a first portion including an aluminum alloy having a non-recrystallized grain structure, and a second portion including an activation metal corrodible to the aluminum alloy, wherein the second portion and the first portion are coupled to one another with the activation metal of the second portion in contact with the aluminum alloy of the first portion at a plurality of points of contact stress, and the activation metal of the second portion is penetrable into the non-recrystallized grain structure of the aluminum alloy of the first portion via the addition of heat.

The invention discloses electric conductor combined by composite conductor and its manufacturing method; the electric conductor forms interface with same or different characteristics among each layer contact surfaces with same or different properties, such as mixture, crystals, alloy, oxysome, etc. When it is electrified, it produces kinds of same or different current effect, such as skin effect, eddy current, ring current, magnetic effect, heat effect, crowding effect, or combined effect which combines each above-mentioned effect; it will play special role and effect if applied on reserved equipment.