A method of making dispersion-strengthened alloy particles involves melting an alloy having a corrosion and/or oxidation resistance-imparting alloying element, a dispersoid-forming element, and a matrix metal wherein the dispersoid-forming element exhibits a greater tendency to react with a reactive species acquired from an atomizing gas than does the alloying element. The melted alloy is atomized with the atomizing gas including the reactive species to form atomized particles so that the reactive species is (a) dissolved in solid solution to a depth below the surface of atomized particles and/or (b) reacted with the dispersoid-forming element to form dispersoids in the atomized particles to a depth below the surface of said atomized particles. The atomized alloy particles are solidified as solidified alloy particles or as a solidified deposit of alloy particles. Bodies made from the dispersion strengthened alloy particles, deposit thereof, exhibit enhanced fatigue and creep resistance and reduced wear as well as enhanced corrosion and/or oxidation resistance at high temperatures by virtue of the presence of the corrosion and/or oxidation resistance imparting alloying element in solid solution in the particle alloy matrix.

Systems and methods for forming near net-shape metal parts from binderless metal powder are disclosed. Systems include a mold die that defines a die cavity and may include one or more ultrasonic transducers operatively coupled to the mold die. Systems may be configured to introduce binderless metal powder into a die cavity and/or to compact the binderless metal powder within the die cavity. Methods include introducing binderless metal powder into a die cavity of a mold die and compacting the binderless metal powder within the die cavity to form a green part within the die cavity. The binderless metal powder may include spheroidal metal particles and angular metal particles. The methods may further include separating the green part from the mold die and sintering the green part, after separating, to form a sintered near net-shape metal part.

A method of fabricating a material having a high concentration of a carbide constituent. The method may comprise adding a carbide source to a biocompatible material in which a weight of the carbide source is at least approximately 10% of the total weight, heating the carbide source and the biocompatible material to a predetermined temperature to melt the biocompatible material and allow the carbide source to go into solution to form a molten homogeneous solution, and impinging the molten homogeneous solution with a high pressure fluid to form spray atomized powder having carbide particles. The size of a particle of carbide in the atomized powder may be approximately 900 nanometers or less. The biocompatible material may be cobalt chrome, the carbide source may be graphite, and the fluid may be a gas or a liquid.

Provided is a dendritic silver-coated copper powder which is capable of effectively ensuring a contact, while having excellent electrical conductivity by having the surface coated with silver. A silver-coated copper powder according to the present invention is obtained by coating the surface of a copper powder 1, which is an assembly of copper particles 2 and has a dendritic form having a plurality of branches, with silver. Each copper particle 2, the surface of which is coated with silver, is an ellipsoid that has a breadth within the range of from 0.2 μm to 0.5 μm and a length within the range of from 0.5 μm to 2.0 μm. The average particle diameter (D50) of the copper powder 1, which is obtained by coating the surface of the assembly of the ellipsoidal copper particles 2 with silver, is from 5.0 μm to 20 μm.

A metal powder for powder metallurgy according to the invention contains Co as a principal component, Cr in a proportion of 25 to 32 mass %, Ni in a proportion of 5 to 15 mass %, Fe in a proportion of 0.5 to 2 mass %, W in a proportion of 4 to 10 mass %, Si in a proportion of 0.3 mass % to 1.5 mass %, and C in a proportion of 0.05 mass % to 0.8 mass %, wherein when one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is defined as a first element, and one element selected from the group and having a higher group number in the periodic table than that of the first element or having the same group number as that of the first element and a higher period number than that of the first element is defined as a second element, the first element is contained in a proportion of 0.01 to 0.5 mass %, and the second element is contained in a proportion of 0.01 to 0.5 mass %.

The present invention relates to silver particles capable of having a uniform particle distribution, preventing agglomeration of a powder, and significantly improving dispersibility, the silver particles each having pores therein, and to a manufacturing method therefor and, more specifically, to a manufacturing method for silver particles, the method comprising a silver-complex forming step, a silver slurry preparing step, and a silver particle obtaining step, and to silver particles manufactured therefrom.

The present disclosure relates to a plurality of powder particles configured to be joined in an additive manufacturing process to form a part. Each one of the powder particles has a determined three dimensional, non-spherical shape. The plurality of powder particles are further of dimensions enabling fitting individual ones of the powder particles in abutting relationship with one another. At least a subplurality of the powder particles each have a functionalized surface feature to enhance at least one of clustering or separation of the subplurality of powder particles.

In some examples, a method for additive manufacturing an article, the method including depositing a filament via a filament delivery device to form at least one track of the deposited filament, the at least one track of the deposited filament forming at least a portion of a preform article, wherein the filament includes a sacrificial binder and a powder, wherein the powder includes a plurality of elongated particles with each respective particle defining a longitudinal axis, wherein the longitudinal axes of the plurality of particles are substantially aligned with each other within the at least one track of the deposited filament; removing substantially all the binder from the at least one track of the preform article to form a powder article; and sintering the powder article to form a sintered article.

In some examples, a method for additive manufacturing an article, the method including depositing a filament via a filament delivery device to form at least one track of the deposited filament, the at least one track of the deposited filament forming at least a portion of a preform article, wherein the filament includes a sacrificial binder and a powder, wherein the powder includes a plurality of elongated particles with each respective particle defining a longitudinal axis, wherein the longitudinal axes of the plurality of particles are substantially aligned with each other within the at least one track of the deposited filament; removing substantially all the binder from the at least one track of the preform article to form a powder article; and sintering the powder article to form a sintered article.

The present invention provides an R-T-B based sintered magnet including R.sub.2T.sub.14B crystal grains wherein; a grain boundary is formed by two or more adjacent R.sub.2T.sub.14B crystal grains, an R—O—C concentrated part, in which concentrations of R, O and C are higher than those in the R.sub.2T.sub.14B crystal grains respectively, is in the grain boundary, and a ratio (O/R) of O atom to R atom in the R—O—C concentrated part satisfies the following formula (1):
0.4<(O/R)<0.7.