A method for producing a metal powder provided on the surface thereof with a glassy thin film, wherein a glassy substance is produced in the vicinity of the surface of the metal powder by spray pyrolysis from a solution that contains a thermally decomposable metal compound and a glass precursor that produces a glassy substance that does not form a solid solution with the metal produced from the metal compound by thermal decomposition, so as to form the metal powder provided on the surface thereof with the glassy thin film. The glass precursor is prepared such that the melting temperature Tm.sub.M of the metal and the liquid phase temperature Tm.sub.G of the mixed oxide of the glassy substance satisfy the following formula (1):
−100 [° C.]≤(Tm.sub.M−Tm.sub.G)≤500 [° C.]  (1).

The invention relates to a production method of the powders composed of spherical heavy metal particles utilizing an ultrasonic atomization, where these powders can be applied in industrial applications, like additive manufacturing and several other. The method for production of heavy metal powders by ultrasonic atomization comprises providing a heavy metal raw material (5) in the vicinity of a heat source (13) being an electric arc (13), heating the heavy raw material (5) by the electric arc (13), so as to create a molten metal pool (21) on a sonotrode (3), the molten metal pool (21) having a temperature equal to or greater than the melting temperature of the heavy metal raw material (5), but below the vaporization temperature of the heavy metal raw material (5), providing ultrasonic mechanic vibrations by the sonotrode (3) to the molten metal pool (21), so as to cause the heavy metals droplets (11) being ejected from the molten metal pool (21), directing the ejected heavy metal droplets (11) away from the molten metal pool (21), so as the heavy metal droplets (11) freely cool down within a predetermined distance at least by radiation and transform to a heavy metal powder (11), collecting the heavy metal powder (11), so as to collect at least 75% of the heavy metal raw material (5) in the form of the heavy metal powder (11′).

The invention relates to a production method of the powders composed of spherical heavy metal particles utilizing an ultrasonic atomization, where these powders can be applied in industrial applications, like additive manufacturing and several other. The method for production of heavy metal powders by ultrasonic atomization comprises providing a heavy metal raw material (5) in the vicinity of a heat source (13) being an electric arc (13), heating the heavy raw material (5) by the electric arc (13), so as to create a molten metal pool (21) on a sonotrode (3), the molten metal pool (21) having a temperature equal to or greater than the melting temperature of the heavy metal raw material (5), but below the vaporization temperature of the heavy metal raw material (5), providing ultrasonic mechanic vibrations by the sonotrode (3) to the molten metal pool (21), so as to cause the heavy metals droplets (11) being ejected from the molten metal pool (21), directing the ejected heavy metal droplets (11) away from the molten metal pool (21), so as the heavy metal droplets (11) freely cool down within a predetermined distance at least by radiation and transform to a heavy metal powder (11), collecting the heavy metal powder (11), so as to collect at least 75% of the heavy metal raw material (5) in the form of the heavy metal powder (11′).

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.

An optical mount part having a body that includes a composite of a titanium-zirconium-niobium alloy. The titanium-niobium-zirconium alloy includes titanium, about 13.5 to about 14.5 wt. % zirconium, and about 18 to about 19 weight % (wt. %) niobium. The titanium-niobium-zirconium alloy has a congruent melting temperature of about 1750 to about 1800° Celsius (° C.).

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.

Metal powder particles for use in additive manufacturing are made by removing material from the surface of the particles using wet chemical etching to create a nanoscale texturing of the surface, increasing absorptivity by the metal powder particles of incident laser light and maintaining flowability. The nanoscale texturing has sub-wavelength features at laser wavelengths in the range 800-1100 nm. The particles are substantially spherical and have mean diameters in the range 10-70 μm.

Metal powder particles for use in additive manufacturing are made by removing material from the surface of the particles using wet chemical etching to create a nanoscale texturing of the surface, increasing absorptivity by the metal powder particles of incident laser light and maintaining flowability. The nanoscale texturing has sub-wavelength features at laser wavelengths in the range 800-1100 nm. The particles are substantially spherical and have mean diameters in the range 10-70 μm.

Atomization processes for manufacturing a metal powder or an alloy powder having a melting point comprising of about 50° Celsius to about 500° Celsius are provided herein. In at least one embodiment, the processes comprise providing a melt of a metal or an alloy having said melting point of about 50° Celsius to about 500° Celsius through a feed tube; diverting the melt at a diverting angle with respect to a central axis of the feed tube to obtain a diverted melt; directing the diverted melt to an atomization area; and providing at least one atomization gas stream to the atomization area. The atomization process can be carried out in the presence of water within an atomization chamber used for the atomization process. In at least one embodiment, the processes provide a distribution of powder with an average particle diameter under 20 microns with geometric standard deviation of lower than about 2.0.