A grain boundary diffusion method for a rare-earth (RE) magnet is provided. The method includes coating particles of the RE magnet with a coating material. Each RE magnet particle includes a plurality of grains. The coated particles are then simultaneously heat treated and compacted. The heat treated, compacted, and coated particles are then formed into a rare earth magnet. In a form of the method, the heat treated, compacted, and coated particles are hot deformed prior to being formed into a rare earth magnet. Another form of the method achieves the grain boundary diffusion without first sintering the rare earth magnet.

A grain boundary diffusion method for a rare-earth (RE) magnet is provided. The method includes coating particles of the RE magnet with a coating material. Each RE magnet particle includes a plurality of grains. The coated particles are then simultaneously heat treated and compacted. The heat treated, compacted, and coated particles are then formed into a rare earth magnet. In a form of the method, the heat treated, compacted, and coated particles are hot deformed prior to being formed into a rare earth magnet. Another form of the method achieves the grain boundary diffusion without first sintering the rare earth magnet.

A method is for treating at least one part of a metal component that is at least partly produced by additive manufacturing. The method comprises the steps of heating the at least one part of the metal component to form at least one softened region, and applying a mechanical load to the at least one softened region to plastically deform the metal in the at least one softened region.

A method for manufacturing a magnesium-based thermoelectric conversion material of the present invention includes a raw material-forming step of forming a raw material for sintering by adding silicon oxide in an amount within a range equal to or greater than 0.5 mol % and equal to or smaller than 13.0 mol % to a magnesium-based compound, and a sintering step of heating the raw material for sintering at a temperature within a range equal to or higher than 750 C. and equal to or lower than 950 C. while applying pressure equal to or higher than 10 MPa to the raw material for sintering so as to form a sintered substance.

A method for preparing an ultra-long-tube type fine-grain molybdenum tube target uses molybdenum powder with the purity being greater than 3N to prepare a target tube with a uniform wall thickness, where the length is 1700-2700 mm; the diameter is greater than 150 mm; and the wall thickness is 15-40 mm. The method includes: taking molybdenum powder, feeding the molybdenum powder into a film, molding by static pressing, placing in a medium frequency furnace, performing hydrogen sintering to form a tube blank, placing into a mold, forging the mold of a tube target, placing into tempering furnace, annealing, forming fine-grain structures, fine processing, washing, and drying to prepare a molybdenum tube target. The method overcomes defects of a sintering process and a forging process, and relates to simple processes, easy industrial production and control, reduced pollution, reduced cost, improved quality, and remarkably improved production efficiency.

Provided is a method for manufacturing a rare-earth magnet having good workability and capable of manufacturing a rare-earth magnet having low oxygen density. A method for manufacturing a rare-earth magnet includes: a first step of applying or spraying graphite-based lubricant GF on an inner face of a forming die M, and charging magnetic powder MF as a rare-earth magnet material in the forming die M, followed by cold forming, to form a cold-forming compact 10 having a surface on which a graphite-based lubricant coat 12 is formed; a second step of performing hot forming to the cold-forming compact 10 to form a sintered body 20 having a surface on which a graphite-based lubricant coat 22 is formed; and a third step of, in order to give the sintered body 20 anisotropy, performing hot deformation processing to the sintered body 20 to form the rare-earth magnet 30.

Provided is a method for manufacturing a rare-earth magnet having good workability and capable of manufacturing a rare-earth magnet having low oxygen density. A method for manufacturing a rare-earth magnet includes: a first step of applying or spraying graphite-based lubricant GF on an inner face of a forming die M, and charging magnetic powder MF as a rare-earth magnet material in the forming die M, followed by cold forming, to form a cold-forming compact 10 having a surface on which a graphite-based lubricant coat 12 is formed; a second step of performing hot forming to the cold-forming compact 10 to form a sintered body 20 having a surface on which a graphite-based lubricant coat 22 is formed; and a third step of, in order to give the sintered body 20 anisotropy, performing hot deformation processing to the sintered body 20 to form the rare-earth magnet 30.

A method of making an engine system component is disclosed. The method may include loading a first metal-based material and a second metal-based material into an extrusion chamber. The first metal-based material may concentrically surround the second metal-based material, and the first metal-based material may have at least one of a thermal property and a wear resistance different than the second metal-based material. The method may additionally include forming an extrudate by simultaneously passing the first metal-based material and the second metal-based material through a die. The first metal-based material of the extrudate may be metallurgically bonded to the second metal-based material of the extrudate. The method may also include forging the extrudate.

A method of making an engine system component is disclosed. The method may include loading a first metal-based material and a second metal-based material into an extrusion chamber. The first metal-based material may concentrically surround the second metal-based material, and the first metal-based material may have at least one of a thermal property and a wear resistance different than the second metal-based material. The method may additionally include forming an extrudate by simultaneously passing the first metal-based material and the second metal-based material through a die. The first metal-based material of the extrudate may be metallurgically bonded to the second metal-based material of the extrudate. The method may also include forging the extrudate.

A metal matrix composite with a uniformly distributed ceramic component is made by mixing nano size ceramic particles with a surfactant and/or dispersing agent in a polar liquid to produce a colloidal solution, blending the ceramic particles with micron or sub-micron size metallic particles, and then compacting the blended ceramic and metallic particles into a solid mass.