A method and a system for manufacturing a structure includes the steps of: (a) supplying a mixture consisting a plurality of primitive materials at a target spot; (b) melting and solidifying the mixture disposed at the target spot to form a portion of a metallic structure consisting of an alloy of the plurality of the primitive materials; and (c) repeating steps (a) and (b) at a plurality of target spots in a three-dimensional space to produce the metallic structure of the alloy.

There is provided a manufacturing method of a Ni-based alloy repaired member having a repair piece formed at a damaged portion of a base material. The base material and the repair piece are made of a high precipitation-strengthened Ni-based alloy material. The manufacturing method includes the steps of: preprocessing a surface of the damaged portion; preparing a Ni-based alloy powder having a predetermined chemical composition; depositing a sprayed piece on the damaged portion by a high-speed collision spraying process using the Ni-based alloy powder; subjecting the sprayed piece to a predetermined heat treatment so that the sprayed piece is thermally refined to a softened sprayed piece; processing the softened sprayed piece into a shaped sprayed piece with a desired shape; and subjecting whole of the shaped sprayed piece and the base material to a predetermined heat treatment so that the shaped sprayed piece is thermally refined to the repair piece.

Provided is a color encoding method including providing a composition including a liquid medium and magnetic nanoparticles dispersed in the liquid medium; applying a magnetic field to the composition to align the magnetic nanoparticles; and applying a patterned energy source to the composition to solidify the composition, wherein more than one region of the composition are sequentially solidified with varying magnetic field strength to fix a plurality of color codes.

Provided is a color encoding method including providing a composition including a liquid medium and magnetic nanoparticles dispersed in the liquid medium; applying a magnetic field to the composition to align the magnetic nanoparticles; and applying a patterned energy source to the composition to solidify the composition, wherein more than one region of the composition are sequentially solidified with varying magnetic field strength to fix a plurality of color codes.

A rare-earth cobalt permanent magnet having excellent magnetic characteristics, a method for manufacturing such a rare-earth cobalt permanent magnet, and a device including such a rare-earth cobalt permanent magnet are provided. A rare-earth cobalt permanent magnet consisting of 23 to 27 mass % of a rare-earth element R including Sm, 4.0 to 5.0 mass % of Cu, 22 to 27 mass % of Fe, 1.7 to 2.5 mass % of Zr, and a remainder consisting of Co and unavoidable impurities, in which the rare-earth cobalt permanent magnet includes a plurality of crystal grains and grain boundary parts, and a size of a cell structure constituting the crystal grain is 100 to 600 nm.

The present invention relates to a sintered magnet including a main phase including an R.sub.2T.sub.14B compound, in which the element R is a rare earth element, and the element T is Fe or includes Fe and Co with which a part of Fe is substituted, and a grain boundary phase which is present at a grain boundary triple junction and contains a rare earth element including a heavy rare earth element, Cu and the element T, in which a content of the rare earth element in the grain boundary phase as a whole is 55 mass % or more, and a Cu-rich region containing 8 mass % or more of Cu accounts for 9 vol % or more of the grain boundary phase.

A method of manufacturing a hard-to-weld material by a beam-assisted additive manufacturing process is presented. The method includes depositing a first layer for the material onto the substrate, the first layer including a major fraction of a base material for the component and a minor fraction of a solder, depositing a second layer of the base material for the component and a thermal treatment of the layer arrangement. The thermal treatment includes a first thermal cycle at a first temperature above 1200 C. for a duration of more than 3 hours, a subsequent second thermal cycle at a second temperature above 1000 C. for more than 2 hours, and a subsequent third thermal cycle and a third temperature above 700 C. for more than 12 hours. A manufactured component is also presented.

Formulations of reactive materials, such as aluminum, magnesium and alloys thereof, with combustible additives such as wood derivatives or charcoal, provide a composition for neutralizing energetic materials via combustion. Specifically, explosive substances such as ammonium nitrate and urea nitrate, which are commonly used as homemade explosives, are rapidly incinerated in a non-propagating manner by the contact with burning reactive material formulations.

Novel metallic systems and methods for their fabrication provide an extreme creep-resistant nano-crystalline metallic material. The material comprises a matrix formed of a solvent metal 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 material.

The present invention provides a samarium-cobalt magnet and a method for preparing the same. The method comprises mixing an alloy powder with a zirconium powder in an amount of 0.1-0.35 wt % of the weight of the alloy powder to form a mixture. The alloy powder is formed from 10.5-13.5 wt % of samarium, 12.5-15.5 wt % gadolinium, 50-55 wt % of cobalt, 13-17 wt % of iron, 4-10 wt % of copper, and 2-7 wt % of zirconium. The method brings about at low costs a samarium-cobalt magnet having a positive temperature coefficient of remanence.