An alloy powder contains greater than or equal to 3% by mass and less than or equal to 30% by mass of tungsten, greater than or equal to 2% by mass and less than or equal to 30% by mass of aluminum, greater than or equal to 0.2% by mass and less than or equal to 15% by mass of oxygen, and at least one of cobalt and nickel as the balance. The alloy powder has an average particle diameter of greater than or equal to 0.1 μm and less than or equal to 10 μm.

Methods of forming 3D printed metal objects and compositions for 3D printing are described herein. In an example, a method of forming a 3D printed metal object can comprise: (A): a build material comprising at least one metal being deposited; (B): a fusing agent being selectively jetted on the build material, the fusing agent comprising: (i) at least one hydrated metal salt having a dehydration temperature of from about 100° C. to about 250° C., and (ii) a carrier liquid comprising at least one surfactant and water; (C): the build material and the selectively jetted fusing agent being heated to a temperature of from about 100° C. to about 250° C. to: (a) remove the carrier liquid, (b) dehydrate the hydrated metal salt, and (c) bind the build material and the selectively jetted fusing agent; and (D): (A), (B), and (C) being repeated at least one time to form the 3D printed metal object.

Methods of forming 3D printed metal objects and compositions for 3D printing are described herein. In an example, a method of forming a 3D printed metal object can comprise: (A): a build material comprising at least one metal being deposited; (B): a fusing agent being selectively jetted on the build material, the fusing agent comprising: (i) at least one hydrated metal salt having a dehydration temperature of from about 100° C. to about 250° C., and (ii) a carrier liquid comprising at least one surfactant and water; (C): the build material and the selectively jetted fusing agent being heated to a temperature of from about 100° C. to about 250° C. to: (a) remove the carrier liquid, (b) dehydrate the hydrated metal salt, and (c) bind the build material and the selectively jetted fusing agent; and (D): (A), (B), and (C) being repeated at least one time to form the 3D printed metal object.

The present disclosure provides a powder material that makes it possible to achieve higher flowability than before and to increase the crushing strength of particles. The powder material of the present disclosure has a dendritic structure 1. The dendritic structure 1 has a cemented carbide composition or a cermet composition.

A method of manufacturing a three-dimensionally formed object includes: forming a layer using a flowable composition including constituent material particles of a three-dimensionally formed object and a flowable composition including support portion-forming particles for forming a support portion which supports the three-dimensionally formed object during the formation of the three-dimensionally formed object; and imparting energy to the constituent material particles and the support portion-forming particles, in which in the imparting of the energy, the energy is imparted such that a temperature of the constituent material particles and a temperature of the support portion-forming particles are equal to or higher than a sintering temperature of the constituent material particles and are lower than a sintering temperature of the support portion-forming particles.

A method of manufacturing a three-dimensionally formed object includes: forming a layer using a flowable composition including constituent material particles of a three-dimensionally formed object and a flowable composition including support portion-forming particles for forming a support portion which supports the three-dimensionally formed object during the formation of the three-dimensionally formed object; and imparting energy to the constituent material particles and the support portion-forming particles, in which in the imparting of the energy, the energy is imparted such that a temperature of the constituent material particles and a temperature of the support portion-forming particles are equal to or higher than a sintering temperature of the constituent material particles and are lower than a sintering temperature of the support portion-forming particles.

The present application relates to a method for preparing a target material, the method including: spraying a transition layer on the surface of a substrate in an atmospheric atmosphere to obtain a substrate containing the transition layer; spraying a target material layer on the surface of the substrate containing the transition layer in an atmospheric atmosphere. The present application also discloses a method for preparing a tubular target material and a target material.

This disclosure provides an improvement over the state of the art by teaching a low-cost method to produce feedstock powder, without undergoing a phase change, from industrially relevant wrought alloys that are widely available at low cost. The surfaces of aspherical particles are functionalized with particulates having a different size and composition than the particles, to control the solidification response of the feedstock. Some variations provide a metal-containing functionalized material comprising: a plurality of aspherical particles comprising a metal or a metal alloy; and a plurality of metal-containing or ceramic particulates that are assembled on surfaces of the aspherical particles, wherein the particulates are compositionally different than the aspherical particles. Methods of making and using the metal-containing functionalized materials are described. The invention provides an economic advantage over traditional gas-atomized or water-atomized metal powder feedstocks for powder-based metal additive manufacturing or other powder metallurgy processes.

This disclosure provides an improvement over the state of the art by teaching a low-cost method to produce feedstock powder, without undergoing a phase change, from industrially relevant wrought alloys that are widely available at low cost. The surfaces of aspherical particles are functionalized with particulates having a different size and composition than the particles, to control the solidification response of the feedstock. Some variations provide a metal-containing functionalized material comprising: a plurality of aspherical particles comprising a metal or a metal alloy; and a plurality of metal-containing or ceramic particulates that are assembled on surfaces of the aspherical particles, wherein the particulates are compositionally different than the aspherical particles. Methods of making and using the metal-containing functionalized materials are described. The invention provides an economic advantage over traditional gas-atomized or water-atomized metal powder feedstocks for powder-based metal additive manufacturing or other powder metallurgy processes.

A thermoelectric sintered body according to an embodiment comprises thermoelectric powder, the thermoelectric powder, arranged in a horizontal direction, comprising: a plurality of first powders in the shape of plate-type flakes; and a plurality of second powders in a shape different from that of the first powders, wherein the second powders comprise 5 volume % or less of the total thermoelectric powder.