Novel metallic systems and methods for their fabrication provide high temperature machine parts formed of a consolidated nano-crystalline metallic material. The material comprises a matrix formed of a solvent metal having a melting point greater than 1,250 C. with crystalline grains having diameters of no more than about 500 nm, and a plurality of dispersed metallic particles formed on the basis of a solute metal in the solvent metal matrix and having diameters of no more than about 200 nm. The particle density along the grain boundary of the matrix is as high as about 2 nm.sup.2 of grain boundary area per particle so as to substantially block grain boundary motion and rotation and limit creep at temperatures above 35% of the melting point of the consolidated nano-crystalline metallic material. The machine parts formed may include turbine blades, gears, hypersonics, radiation shielding, and other high temperature parts.

Novel metallic systems and methods for their fabrication provide high temperature machine parts formed of a consolidated nano-crystalline metallic material. The material comprises a matrix formed of a solvent metal having a melting point greater than 1,250 C. with crystalline grains having diameters of no more than about 500 nm, and a plurality of dispersed metallic particles formed on the basis of a solute metal in the solvent metal matrix and having diameters of no more than about 200 nm. The particle density along the grain boundary of the matrix is as high as about 2 nm.sup.2 of grain boundary area per particle so as to substantially block grain boundary motion and rotation and limit creep at temperatures above 35% of the melting point of the consolidated nano-crystalline metallic material. The machine parts formed may include turbine blades, gears, hypersonics, radiation shielding, and other high temperature parts.

Provided is a negative electrode active material that can improve the discharge capacity per volume and charge-discharge cycle characteristics. The negative electrode active material according to the present embodiment contains an alloy phase. The alloy phase undergoes thermoelastic diffusionless transformation when releasing metal ions or occluding metal ions. The oxygen content of the negative electrode active material is not more than 5000 ppm in mass.

A sintered material containing silver particles, copper particles, a nitrogen-containing compound, and a reducing agent, in which a primary particle diameter of the silver particles is 200 nm or less, and a volume-based 50% cumulative particle diameter of the copper particles, as measured by laser diffraction/scattering particle diameter distribution measurement, is 1 ?m or more.

A soft magnetic powder including a core containing a soft magnetic metal material and an insulating film covering the surface of the core. The insulating film contains an insulating metal oxide and an iron component, and the iron component is embedded in the insulating film.

A manufacturing method of an amorphous soft magnetic core using a Fe-based amorphous metallic powder includes size-sorting an amorphous metallic powder obtained by pulverizing an amorphous ribbon prepared by a rapid solidification process (RSP) and then using the amorphous metallic powder having a particle size distribution so as to comprise 10 to 85 wt. % of powder having a particle size of 75 to 100 m, 10 to 70 wt. % of powder having a particle size of 50 to 75 m, and 5 to 20 wt. % of powder having a particle size of 5 to 50 m to manufacture an amorphous soft magnetic core with excellent high-current DC bias characteristic and good core loss characteristic.

An object of the present invention is to provide a method for producing a metal nanowire, which makes it possible to obtain a metal nanowire with a low connection resistance; a metal nanowire; a dispersion liquid; and a conductive film. The method for producing a metal nanowire of an embodiment of the present invention includes an anodization step of forming an anodized film having pores on a surface of a valve metal substrate, a metal filling step of filling the pores with a metal, a mold removing step of removing the anodized film and the valve metal substrate to obtain an acicular metal, and a protective layer forming step of forming a protective layer containing a corrosion inhibitor on the acicular metal.

The present invention provides an undercooling solidification method for preparing an amorphous or nanocrystalline soft magnetic alloy with high Fe content and the applicable amorphous or nanocrystalline alloy composition. The undercooling solidification is realized by glass purification combined with cyclical superheating or electromagnetic levitation melting. An undercooling solidification alloy is prepared into amorphous strips or powders through rapid quenching or atomization of melt, and can be prepared into a nanocrystalline alloy through heat treatment. The chemical formula of the applicable amorphous or nanocrystalline alloy is FeSiBM, wherein M is one or more of P, C, Nb, Mo, Zr, Hf, Mo, Y, Cu and Co. The amorphous or nanocrystalline alloy prepared by undercooling non-equilibrium solidification has the characteristics of high amorphous forming ability, high saturation magnetization and low coercive force.

A permanent magnet contains a rare-earth element R, a transition metal element T, and boron. The permanent magnet contains a plurality of main phase grains and a plurality of soft magnetic grains. The plurality of soft magnetic grains contain Fe. A cross-section of the permanent magnet includes a plurality of soft magnetic regions. The cross-section of the permanent magnet is parallel to an easy magnetization axis direction of the permanent magnet. Each of the plurality of soft magnetic regions contains the plurality of soft magnetic grains aligned along a direction orthogonal to the easy magnetization axis direction. The plurality of main phase grains and the plurality of soft magnetic regions are alternately disposed in the easy magnetization axis direction. An average value of width of the plurality of soft magnetic grains in the easy magnetization axis direction ranges from 20 nm to 5 ?m.

A nanocomposite metal material includes a carrier formed of Zr and two-element metal particles supported on the carrier. The two-element metal is formed of Cu and Ni, and a degree of oxidation of the carrier is more than 31% and 100% or less. In a case where the nanocomposite metal material is disposed in a reaction furnace of a thermal reactor, the inside of the reaction furnace is brought into a vacuum state, and the inside of the reaction furnace is heated to a temperature range of 250? C. or higher and 350? C. or lower with a heating mechanism included in the thermal reactor while supplying at least one of hydrogen gas and deuterium gas into the reaction furnace, excessive heat of the nanocomposite metal material is 100 W/kg or more.