The present application describes an article having a first metal component joined to a second metal component by a metallurgic joint of presintered powdered metal interposed between contiguous surfaces of the first metal component and the second metal component. The present application also describes a composition for use in a brazing process comprising a presintered powdered metal. The present application also describes a process for brazing including the following steps: presintering a powdered metal; adding the presintered powdered metal to a first and second metal component; and heating the combination of the first and second metal components containing the presintered powdered metal until the powdered metal melts and joins the metal components to form a metallurgic joint.

A powder cleaning system can include a fluidized bed reactor configured to retain powder and fluidize the powder to remove adsorbate and/or other contaminants from the powder, at least one inlet line, and one or more gas sources configured to be in selective fluid communication with the fluidized bed reactor via the at least one inlet line to selectively provide an inlet flow having one or more gases to the fluidized bed reactor to fluidize the powder with the one or more gases within the fluidized bed reactor. The system can include at least one outlet line in fluid communication with the fluidized bed reactor and configured to allow removal of outlet flow which comprises the adsorbate and/or other contaminants from the fluidized bed reactor.

A shaping system forms a three-dimensional shaped object on a target surface using a beam and has: a beam irradiation section emitting beams passing through tilted optical paths; a material supplying section having a material supplying port and supplies along the axis a powdered material irradiated with the beams from the beam irradiation section; a cover member having an inner surface that gradually converges from a side at one end to a side at the other end and has an outlet formed at the other end through which the beams from the beam irradiation section pass; and a gas supply apparatus supplying inert gas via a gas supplying port into a space inside the cover member, and the inert gas flows outside the space via the outlet of the cover member, and the shaping material is supplied outside the space via the outlet of the cover member.

A shaping system forms a three-dimensional shaped object on a target surface using a beam and has: a beam irradiation section emitting beams passing through tilted optical paths; a material supplying section having a material supplying port and supplies along the axis a powdered material irradiated with the beams from the beam irradiation section; a cover member having an inner surface that gradually converges from a side at one end to a side at the other end and has an outlet formed at the other end through which the beams from the beam irradiation section pass; and a gas supply apparatus supplying inert gas via a gas supplying port into a space inside the cover member, and the inert gas flows outside the space via the outlet of the cover member, and the shaping material is supplied outside the space via the outlet of the cover member.

A method for preparing a nano-phase strengthened nickel-based superalloy using micron-scale ceramic particles is provided. In the method, a nickel-based superalloy is used as a matrix, and one or more of TiC, TiB.sub.2, WC and Al.sub.2O.sub.3 are used as a strengthening phase. A ceramic particle raw material used as the strengthening phase has a particle size of 1-5 m and is added in an amount of 1-5 wt. %. A nickel-based superalloy composite powder having homogeneously distributed nano-scale ceramic is prepared by mechanical milling. A nano-scale ceramic phase strengthened nickel-based superalloy is prepared by 3D printing technology, which has a homogeneously distributed nano-scale ceramic phase and excellent mechanical properties.

A method for preparing a nano-phase strengthened nickel-based superalloy using micron-scale ceramic particles is provided. In the method, a nickel-based superalloy is used as a matrix, and one or more of TiC, TiB.sub.2, WC and Al.sub.2O.sub.3 are used as a strengthening phase. A ceramic particle raw material used as the strengthening phase has a particle size of 1-5 m and is added in an amount of 1-5 wt. %. A nickel-based superalloy composite powder having homogeneously distributed nano-scale ceramic is prepared by mechanical milling. A nano-scale ceramic phase strengthened nickel-based superalloy is prepared by 3D printing technology, which has a homogeneously distributed nano-scale ceramic phase and excellent mechanical properties.

An insulator-coated magnetic alloy powder particle includes a magnetic alloy powder particle and an insulator that coats a surface of the magnetic alloy powder particle and that has a plurality of protrusions at a surface thereof, wherein the insulator includes a first insulator in a particulate form enclosed in the protrusion, and a second insulator in a film form that coats at least a part of a surface of the first insulator.

An insulator-coated magnetic alloy powder particle includes a magnetic alloy powder particle and an insulator that coats a surface of the magnetic alloy powder particle and that has a plurality of protrusions at a surface thereof, wherein the insulator includes a first insulator in a particulate form enclosed in the protrusion, and a second insulator in a film form that coats at least a part of a surface of the first insulator.

A laser powder bed fusion additive manufacturing method including performing laser melting of layers of a powder bed of steel powder in a protective atmosphere including nitrogen, wherein a temperature of the powder bed is below 220 C. A composition of the steel powder may include, by weight: 3% to 7% Cr, 2-5% Mo, 0.2% to 0.7% V, max 0.7% Si, max 1% Mn, max 1.5% C, and a balance of Fe.

A laser powder bed fusion additive manufacturing method including performing laser melting of layers of a powder bed of steel powder in a protective atmosphere including nitrogen, wherein a temperature of the powder bed is below 220 C. A composition of the steel powder may include, by weight: 3% to 7% Cr, 2-5% Mo, 0.2% to 0.7% V, max 0.7% Si, max 1% Mn, max 1.5% C, and a balance of Fe.