A method for manufacturing a porous metal body according to the present invention includes: a surface oxidizing step of heating a titanium-containing powder in an atmosphere containing oxygen at a temperature of 250° C. or more for 30 minutes or more to provide a surface-oxidized powder; and a sintering step of depositing the surface-oxidized powder in a dry process, and sintering the surface-oxidized powder by heating it in a reduced pressure atmosphere or an inert atmosphere at a temperature of 950° C. or more.

A spherical Ti-based powder and a manufacturing method therefor are provided. The spherical Ti-based powder has a 50% particle size (D50) of 1 to 250 μm in a cumulative particle size distribution based on volume, in which a total amount of oxygen and hydrogen is less than 3000 ppm by mass, an area defect rate in a cross-section of the spherical Ti-based powder is less than 0.100%, and an area circularity of the spherical Ti-based powder in a secondary projection image is 0.90 or more. The spherical Ti-based powder can be obtained by subjecting a pulverized Ti-based powder to a fusion and solidification treatment using a thermal plasma in which a flow rate of hydrogen gas as a working gas is adjusted to less than 0.3 l/min.

In one example, a system for loading a build material powder supply receptacle for a 3D printer includes a reconditioner having a container and a heater to burn unwanted residue from used build material powder in the container, to form reconditioned build material powder, a conveyor operatively connected to the reconditioner to convey used build material powder to the container, and a dispenser operatively connected to the reconditioner to dispense reconditioned build material powder from the container into the supply receptacle.

In one example, a system for loading a build material powder supply receptacle for a 3D printer includes a reconditioner having a container and a heater to burn unwanted residue from used build material powder in the container, to form reconditioned build material powder, a conveyor operatively connected to the reconditioner to convey used build material powder to the container, and a dispenser operatively connected to the reconditioner to dispense reconditioned build material powder from the container into the supply receptacle.

A method of forming an article includes producing a base powder including a plurality of base particles. Each base particle includes an external surface and a first material. The method further includes removing one or more oxides from the external surface of each base particle to form a cleaned powder including a plurality of cleaned particles. Each cleaned particle includes a cleaned external surface made of the first material. The method further includes coating the cleaned external surface of each cleaned particle with a second material having a greater oxidation resistance than the first material to form a coated powder including a plurality of coated particles. Each coated particle includes an external layer including the second material that fully covers the cleaned external surface made of the first material. The method further includes forming the article using the coated powder.

A method of forming an article includes producing a base powder including a plurality of base particles. Each base particle includes an external surface and a first material. The method further includes removing one or more oxides from the external surface of each base particle to form a cleaned powder including a plurality of cleaned particles. Each cleaned particle includes a cleaned external surface made of the first material. The method further includes coating the cleaned external surface of each cleaned particle with a second material having a greater oxidation resistance than the first material to form a coated powder including a plurality of coated particles. Each coated particle includes an external layer including the second material that fully covers the cleaned external surface made of the first material. The method further includes forming the article using the coated powder.

A method for producing a magnetic powder includes the steps of: mixing neodymium oxide, boron, and iron to prepare a first mixture; adding and mixing calcium to the first mixture to prepare a second mixture; mixing an alkali metal with the second mixture to prepare a third mixture; and placing a carbon sheet on the third mixture, placing silica sand (SiO.sub.2 sand) thereon, and then heating the same to a temperature of 800° C. to 1100° C.

A method for producing a magnetic powder includes the steps of: mixing neodymium oxide, boron, and iron to prepare a first mixture; adding and mixing calcium to the first mixture to prepare a second mixture; mixing an alkali metal with the second mixture to prepare a third mixture; and placing a carbon sheet on the third mixture, placing silica sand (SiO.sub.2 sand) thereon, and then heating the same to a temperature of 800° C. to 1100° C.

A system and method are presented for producing solder paste having undercooled metallic core-shell particles. In one or more arrangements, the system includes a reconstitution assembly, a dispenser assembly, and a mixer, among other components. The reconstitution assembly is configured to place the cores of the solid core metallic core-shell particles into an undercooled liquid state to form a plurality of undercooled metallic core-shell particles. The dispenser assembly is configured to dispense one or more of a set of available flux components. The mixer assembly is configured to mix the one or more of the set of flux components dispensed by the dispenser assembly with the plurality of undercooled metallic core-shell particles formed by the reconstitution assembly to form a solder paste.

A system and method are presented for producing solder paste having undercooled metallic core-shell particles. In one or more arrangements, the system includes a reconstitution assembly, a dispenser assembly, and a mixer, among other components. The reconstitution assembly is configured to place the cores of the solid core metallic core-shell particles into an undercooled liquid state to form a plurality of undercooled metallic core-shell particles. The dispenser assembly is configured to dispense one or more of a set of available flux components. The mixer assembly is configured to mix the one or more of the set of flux components dispensed by the dispenser assembly with the plurality of undercooled metallic core-shell particles formed by the reconstitution assembly to form a solder paste.