A method for producing nanoparticles is provided. The method comprises the steps of providing a main tube that is closed at a bottom of the main tube and that comprises a sample position at the bottom, providing a main opening in the main tube, positioning a precursor material at the sample position, evaporating the precursor material by heating the precursor material by a heating device that is in thermal contact with the main tube, and providing a stream of a primary gas into the main tube through an inlet channel which is arranged within the main tube, wherein a cross section of the main tube at the sample position is smaller than at other positions of the main tube.

A method and system for recovering a high yield of low carbon ferroalloy, e.g., low carbon ferrochrome, from chromite and low carbon ferrochrome produced by the method. A stoichiometric mixture of feed materials including scrap aluminum granules, lime, silica sand, and chromite ore are provided into a plasma arc furnace. The scrap aluminum granules are produced from used aluminum beverage containers. The feed materials are heated, whereupon the aluminum in the aluminum granules produces an exothermic reaction reducing the chromium oxide and iron oxide in the chromite to produce molten low carbon ferrochrome with molten slag floating thereon. The molten low carbon ferrochrome is extracted, solidified and granulated into granules of low carbon ferrochrome. The molten slag is extracted, solidified and granulated into granules of slag.

A water-atomized metal powder is produced by dividing a molten metal stream into a metal powder by making injection water having a liquid temperature of 10 C. or less and an injection pressure of 5 MPa or more impinge on the molten metal stream and cooling the metal powder. Cooling with injection water having a liquid temperature of 10 C. or less and an injection pressure of 5 MPa or more enables can be performed not in the film boiling region but in the transition boiling region from the beginning of cooling. A gas-atomized metal powder may also be produced by dividing a molten metal stream into a metal powder by making an inert gas impinge on the molten metal stream and cooling the metal powder with injection water having a liquid temperature of 10 C. or less and an injection pressure of 5 MPa or more.

A method of making an atomized spherical -Ti/Ta alloy powder for additive manufacturing, having the steps of: a) blending elemental Ti and Ta powders to form a TiTa powder composition; b) hot-isostatically pressing said powder composition to form an TiTa electrode; and c) processing said TiTa electrode by electrode induction melting gas atomization (EIGA) to produce an atomized spherical TiTa alloy powder. A true spherical Ti-50 wt % Ta alloy powder, the product obtained by the process having the steps of: (a) blending elemental Ti and Ta powders to form a 50 wt %-50 wt % TiTa powder composition; b) hot-isostatically pressing said powder composition to form a TiTa electrode; and c) processing said TiTa electrode by electrode induction melting gas atomization (EIGA) to produce an atomized spherical Ti-50 wt % Ta powder comprising spherical -Ti/Ta alloy particles.

A method of making an atomized spherical -Ti/Ta alloy powder for additive manufacturing, having the steps of: a) blending elemental Ti and Ta powders to form a TiTa powder composition; b) hot-isostatically pressing said powder composition to form an TiTa electrode; and c) processing said TiTa electrode by electrode induction melting gas atomization (EIGA) to produce an atomized spherical TiTa alloy powder. A true spherical Ti-50 wt % Ta alloy powder, the product obtained by the process having the steps of: (a) blending elemental Ti and Ta powders to form a 50 wt %-50 wt % TiTa powder composition; b) hot-isostatically pressing said powder composition to form a TiTa electrode; and c) processing said TiTa electrode by electrode induction melting gas atomization (EIGA) to produce an atomized spherical Ti-50 wt % Ta powder comprising spherical -Ti/Ta alloy particles.

A process for the production of steel powders including the steps of: providing molten iron from a blast furnace, refining the molten iron in a converter to form molten steel, refining the molten steel in a vacuum arc degasser to obtain a refined molten steel comprising from 20 to less than 600 ppm C, from 15 to less than 120 ppm S, up to 125 ppm P, up to 80 ppm N and up to 30 ppm O, pouring in a plurality of induction furnaces, adding at least one ferroalloy, pouring the molten steel of each induction furnace in a dedicated reservoir connected to at least one gas atomizer, feeding the at least one gas atomizer of each reservoir in molten steel from each reservoir under pressure and gas atomizing the molten steel to form the steel powder at the desired composition.

The invention relates to an EIGA coil (10) for partial melting an electrode (40). The EIGA coil (10) comprises a plurality of windings (12A, 12B, 12C) which are coaxially arranged with respect to a center axis (M) and axially spaced from each other, wherein each of the plurality of windings (12A, 12B, 12C) is formed in the shape of a ring interrupted by a gap (14A, 14B, 14C) and equidistant with respect to the center axis (M) and extending in a plane perpendicular to the center axis (M). Adjacent windings (12A, 12B; 12B, 12C) of the plurality of windings (12A, 12B, 12C) are respectively connected to each other via a connecting portion (20AB, 20BC; 120AB, 120BC).

An object of the invention is to provide: an alloy article that has excellent homogeneity in the alloy composition and microstructure as well as significant shape controllability, using an HEA with significant mechanical strength and high corrosion resistance; a method for manufacturing the alloy article; and a product using the alloy article. There is provided an alloy article comprising: Co, Cr, Fe, Ni, and Ti elements, each element in content of 5 to 35 atomic %; more than 0 atomic % to 8 atomic % of Mo %; and remainder substances of unavoidable impurities. And, ultrafine particles with an average diameter of 40 nm or less are dispersedly precipitated in matrix phase crystals of the alloy article.

There are provided reactive metal powder atomization manufacturing processes. For example, such processes include providing a heated metal source and contact the heated metal source with at least one additive gas while carrying out the atomization process. Such processes provide raw reactive metal powder having improved flowability. The at least one additive gas can be mixed together with an atomization gas to obtain an atomization mixture, and the heated metal source can be contacted with the atomization mixture while carrying out the atomization process. Reactive metal powder spheroidization manufacturing processes are also provided.

The present application relates to a plasma atomization process and apparatus for producing metallic powders from at least one wire/rod feedstock. In the process, an electrical arc is applied between the at least one wire/rod feedstock, and a plasma torch is employed to generate a supersonic plasma stream at an apex at which the electric arc is transferred to the at least one wire/rod to melt and atomize the at least one wire/rod feedstock to produce the metallic powders. An anti-satellite diffuser is employed to prevent recirculation of the powders in order to avoid satellite formation.