A kind of yttrium nickel alloy and its preparation method and application

Abstract

The invention provides an yttrium-nickel alloy and its preparation method and application, which belong to the technical field of alloy materials. The method provided by the invention comprises the steps of: providing a molten salt electrolyte, the molten salt electrolyte comprising YF 3 and LiF; providing electrolytic raw materials, said electrolytic raw materials include Y 2 o 3 and NiO; the molten salt electrolyte is placed in an electrolytic cell, heated until the molten salt electrolyte is completely melted to obtain an electrolyte melt; electrolytic raw materials are added to the electrolyte melt, and the receiving crucible is placed in an electrolytic cell, The graphite plate is used as the anode and the inert metal electrode is used as the cathode to carry out electrolysis, and a liquid alloy is formed on the surface of the cathode, which is collected in the receiving crucible; the collected liquid alloy is cast to obtain the yttrium-nickel alloy. The present invention uses YF 3 ‑LiF molten salt electrolyte system electrolysis Y 2 o 3 And NiO to prepare yttrium-nickel alloy, no cathode consumption, simple operation, uniform product composition and structure, suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to an yttrium-nickel alloy and a preparation method and application thereof. Background technique [0002] The main components of the rare earth hydrogen storage alloy are lanthanum and nickel, which are prepared by the mixed melting method in production. Specifically, the metal lanthanum and metal nickel are heated to a certain temperature and melted under vacuum conditions, and then cooled after mixing. The addition of yttrium (Y) element to the rare earth hydrogen storage alloy can effectively improve the cycle life of the rare earth hydrogen storage battery and increase the energy storage per unit weight. In the prior art, when the rare earth hydrogen storage alloy is prepared by the mixing method, the yttrium element is usually added in the form of metal yttrium in a stoichiometric ratio. But metal yttrium has a higher melting point of 1522°C. In order to melt metal yt...

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Problems solved by technology

[0005] However, the above methods for preparing rare earth alloys are all self-consumable cathode methods. The rare earth content in the rare earth alloys prepared by this method fluctuates greatly, which affects the consistency of the product; and the cathode consumption is fast during the production process, and frequent replacement is required, and the labor intensity of employees is high.

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