Abstract:
Practice of this invention provides, at least, a method of making a hydrogen storage material comprising the steps of: 1. forming a molten mixture comprising nickel and at least one other transition metal element, the combination of which will form a TiNi-type alloy and including in said molten mixture from about 0.1 at. % to about 10 at. % of one or more elements which will form an alloy which is immiscible in the TiNi-type alloy; and (b) cooling said molten mixture to form a solid alloy-system material by rapid solidification of said molten mixture at a cooling rate of at least 10 DEG C per second.
Abstract:
A method for producing an amorphous metal, which comprises feeding a molten metal (1) into a liquid cooling medium (4) in such a manner as to cause the boiling through spontaneous formation of vapor bubble nuclei, thereby cooling the molten metal (1) rapidly while forming fine particles thereof utilizing the pressure wave induced by the boiling, to yield fine amorphous metal particles; and an apparatus for practicing the method which comprises a material feeding means (3), a cooling section (2) which introduces the cooling medium (4) in an amount being small and sufficient to cool and solidify the fed molten metal (1) and cools the molten metal (1) rapidly while forming fine particles thereof utilizing the pressure wave induced by the boiling caused through spontaneous formation of vapor bubble nuclei, to yield fine amorphous metal particles, and a recovering means (5) for recovering the fine amorphous metal particles from in the cooling medium (4). The method allows the production of an amorphous metal using a material from which conventional methods and apparatus have not been able to produce an amorphous metal, and also the production of amorphous metal particles having a size of from sub-micron order to 100 microns order, especially a few microns, which has not been achieved by conventional methods and apparatus, in good yield and in a large amount.
Abstract:
Methods of making high specific gravity shotgun shot and small arms projectiles from melts containing primarily tungsten and iron, and particularly including specific melting temperature depressants and using specific quenching both compositions are described; and specific conditions and materials; and methods for making high specific gravity shot pellets and projectiles by powder metallurgical techniques are described.
Abstract:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Herstellung mikrofeiner Fasern oder Filamente aus einem schmelzbaren Ausgangsmaterial, das insbesondere kontinuierlich zugeführt wird. Ein Aufwand zur Herstellung der Fasern bzw. Filament soll möglichst gering sein. Dafür wird das Ausgangsmaterial (6) in einer Verdüsungszone (2) durch gleichzeitiges Einbringen thermischer und kinetischer Energie verdüst, wobei vom Ausgangsmaterial (6) schmelzflüssige Partikel abgelöst und in eine Quenchungszone (4) beschleunigt werden, in der die Partikel passiv aktiv mit Kälteüberschuss abgekühlt werden, wobei die dadurch zu Fasern oder Filamenten erstarrten Partikel anschließend in einem Sammelbereich (5) gesammelt werden.
Abstract:
A zinc powder for use in a zinc anode, negative electrode or electrochemical cell comprising zinc metal or zinc alloy particles. The zinc particles have a narrow particle size distribution and a major portion of the having a well controlled chemistry and specific shape, such as teardrop, strand teardrop, acicular or spherical thereby providing improved discharge characteristics and reduced gassing. The powder can be produced by impulse atomisation.
Abstract:
An apparatus for manufacturing a metallic fiber nonwoven fabric mainly comprising a metallic fiber manufacturing apparatus (7), an injection nozzle heater (5), a metallic fiber flying apparatus (6), a nonwoven fabric surface density control mechanism, a method for manufacturing an aluminum fiber fabric by using the metallic fiber nonwoven fabric manufacturing apparatus, and a method for manufacturing a laminated aluminum material. By using the metallic fiber nonwoven fabric manufacturing apparatus, manufacture of a high−quality metallic fiber nonwoven fabric and manufacture of an aluminum fiber nonwoven fabric are possible. Further, manufacture of a laminated aluminum material is also possible.
Abstract:
The invention relates to a method for producing a powder by pulverizing a stream of molten metal using a pulverization gas which directly hits said stream, whereby a) a reactive gas is used as the pulverization gas in such a way that a compound is formed by the reaction of the pulverization gas with the metal or an alloy component thereof and b) the temperature of the pulverization gas and the cooling speed are set in such a way, that the metal or the alloy component thereof is converted into the compound, to a substantial degree completely, in one step.
Abstract:
The invention relates to a method for producing powders that consist of substantially spherical particles from a material such as glass, ceramics or plastic that produces a highly viscous melt that solidifies at a glass transition temperature Tg or at a solidification temperature Ts. The inventive method comprises the following steps: (a) producing a melt of a viscosity eta in the range of from 0.1 to 100 Ns/m ; (b) atomizing the melt using a first gas, said first gas having a temperature TA >/= Tg or >/= 0.5 Ts at the outlet of the nozzle and (c) cooling off the particles produced by atomization in a cooling section downstream of the nozzle using a coolant, the temperature of the coolant being smaller than Tg or Ts.
Abstract:
Uniform sized and shaped spheres (72) are formed by applying a minute periodic disturbance to a low viscosity liquid material. Pressure forces the material through at least one orifice in a crucible (20) as a steady laminar stream. The stream enters an enclosed controlled temperature solidification environment (14) which contains at least one heat transfer medium. A charging means (110) is applied to the stream as the stream exits the crucible and breaks into a plurality of spheres to deflect the spheres as they pass through an electric field. The enclosed controlled temperature solidification environment cools and substantially solidifies the spheres.