Abstract:
The invention relates to a nozzle for producing microdroplets of metal using gas flow, to a nozzle for producing microdroplets using electrodispersion, to a combination of a melt spinner for forming elongate metal fibers with a nozzle and to a method of forming microdroplets using at least one of a gas flow and electrodispersion.
Abstract:
Устройство для получения металлических порошков методом центробежного распыления. Изобретение относится к металлургии, а именно к получению металлических порошков методом центробежного распыления. Техническим результатом является расширение технологических возможностей устройства при получении порошков тугоплавких и химически активных металлов и их сплавов, расширение номенклатуры по крупности получаемых порошков, повышение производительности и снижение энергозатрат. Технический результат достигается в устройстве для получения металлических порошков центробежным распылением заготовок, включающем герметичную камеру с расположенным по ее оси в верхней части плазмотроном, причем оно содержит снабженный механизмом вращения распылитель с закрепленным на нем распылительным диском в виде охлаждаемого распылительного диска, приводы поступательного и вращательного движения двух заготовок, расположенные друг напротив друга с обеспечением ввода заготовок в плазменную струю над центром распылительного диска с пересечением оси вращения распылителя в точке между плазмотроном и диском под углом 70 - 80 градусов к вертикали, при этом заготовки изолированы от элементов конструкции устройства и соединены с источником переменного тока.
Abstract:
L'invention a pour objet un procédé de granulation comprenant une étape de pré-granulation destinée à former un écoulement discontinu d'un métal liquide, sous forme d'un flux de gouttelettes, et une étape d'atomisation destinée à former des granules de métal solides par fragmentation et solidification des gouttelettes reçues sur un disque tournant refroidi. Un autre objet de l'invention est un système de granulation comprenant un creuset et un capillaire relié au creuset, et un dispositif de génération d'un écoulement discontinu de métal liquide en sortie du capillaire configuré pour former un flux de gouttelettes. Le système comprend également un disque tournant refroidi configuré pour recevoir le flux de gouttelettes, fragmenter et solidifier les gouttelettes de façon à former des granules de métal solides.
Abstract:
An apparatus (10) for forming powder, comprising an energy source (14) for emitting at least one energy beam (16) onto a workpiece (12), the energy beam (16) being configured to melt the workpiece (12), at least in part, to form at least one pool of molten material on the workpiece (12), wherein the apparatus (10) is configured to exert a force on the workpiece (12) causing at least a bead of molten material to be ejected from the pool and solidify to form a particle of powder (18).
Abstract:
Systems and methods for atomizing materials are provided. In this regard, a representative system includes: a first unit operative to accelerate the material such that the material experiences an acceleration force higher than Earth's standard gravitational force; and a second unit operative to use atomizing fluid to disturb the material; wherein, while the material is in liquid form and experiencing the acceleration force, liquid droplets of the material depart the exposed surface and become entrained in the atomizing fluid such that at least some of the liquid droplets aerosolize.
Abstract:
Batteries, and anodes comprising an alloy comprising zinc, indium, bismuth and aluminium and a method for producing such batteries and anodes are disclosed.
Abstract:
The invention describes alloyed zinc powders for alkaline batteries. The powders have a high pyknometer density as a consequence of the presence of only a limited quantity of pores. This high pyknometer density results in strongly reduced gassing after partial discharge of the powders. Also, a process for the manufacturing of a zinc alloy powder for alkaline batteries is disclosed, comprising the step of atomising a zinc alloy, characterised in that the atomising process has a flow rate of at least 700 kg/h, and preferably at least 1000, 1100 or even 1650 kg/h. In one embodiment, the atomising process is performed in a controlled atmosphere, wherein the oxygen content is less than 4 % by volume, and preferably between 0.2 and 3.5 %. The atomising process can be a centrifugal atomisation process. In the atomising process, the zinc alloy consists either of: a) 0.005 - 2 % by weight of indium, and 0.005 - 0.2 % by weight of either one of Al and Bi; or b) 0.005 - 2 % by weight of indium, and 0.005 - 0.2 % by weight of Bi, and 0.001 - 0.5 % of either one or both of Al and Ca; or c) 0.005 - 2 % by weight of either one or both of Bi and Al; and 0 - 0.5 % by weight of Pb, the remainder being zinc.
Abstract:
A negative electrode material for a nonaqueous electrode secondary battery which comprises alloy grains comprising grains of Si phase (40) and, surrounding at least a part of each thereof, a solid solution or a phase of an intermetallic conpound of Si with another element selected from the group consisting of the elements belonging to Group 2A, the transition metal, Group 3B and Group 4B of the long term Periodic Table (for example, NiSi2 phase (42) and [NiSi2 + NiSi] phase (41)), and have an average particle diameter of 0.1 to 50 mu m, the grains of Si phase accounting for 5 to 99 wt.% of the material. The alloy grain can be produced by rapid solidification (for example, atomization or roll quenching) of a melt containing Si and another element mentioned above, or, by a method comprising subjecting a Si powder to electroless plating or mechanical alloying, to thereby deposit the other metal thereon and then subjecting the resultant product to heat-treating. This negative charge material can be used for producing a battery having a high discharge capacity and a long lifetime under the condition of use of repeating the charge-discharge cycle. Employment of a rapid solidification method allows the production of such an excellent material with no heat-treatment.