A cryogenic preparation process for the production of self-adhesive nano-layered structure of nickel-aluminum metal powder

Abstract

The invention discloses a deep-cooling preparation technology for producing nickel-aluminum metal powder of a self-adhesive nano layered structure.The preparation technology comprises the steps that metal aluminum foil and metal nickel foil are processed into sheets with the same size; stacking is carried out according to the sequence of aluminum / nickel / aluminum / nickel / and the like / aluminum, and air on the interfaces is removed through a press; materials are put into liquid nitrogen to be cooled to about -190 DEG C; the materials are taken out for deep-cooling rolling, after rolling is finished, the temperature of a rolled piece is below -50 DEG C; a rolled strip material is folded, is put into the liquid nitrogen for re-cooling and then is subjected to deep-cooling rolling again; and the process is repeated for 10-20 times so as to produce nickel-aluminum bimetal composite foil without intermetallic compounds, deep-cooling ball milling treatment is carried out on the prepared nickel-aluminum bimetal composite foil so as to prepare the nickel-aluminum nano powder of the layered structure. The preparation technology is based on a composite rolling technology combining deep-cooling lamination rolling and deep-cooling ball milling, the obtained material is an aluminum / nickel / aluminum / nickel / and the like / aluminum multilayer composite material, and the nickel-aluminum intermetallic compounds are not formed at the interfaces of the nickel and the aluminum in the material.

Description

technical field [0001] The invention belongs to the technical field of composite metal material rolling, and in particular relates to a cryogenic preparation process for producing nickel-aluminum metal powder with a self-adhesive nano-layered structure. Background technique [0002] At present, during the plastic deformation process of nickel and aluminum, an exothermic reaction occurs to form nickel-aluminum intermetallic compounds and achieve micrometallurgical bonding. According to this feature, nickel and aluminum composite materials can be used as self-adhesive materials. At present, there are two commonly used methods: (1) process nickel into powder material, and use aluminum foil for wrapping to form wire rod. (2) Both nickel and aluminum are processed into metal wires with small diameters, and are wound into wire rods through appropriate ratios. [0003] With the development of industries such as 3D printing, people's demand for powder materials has increased. If ...

AI Technical Summary

Problems solved by technology

If the traditional plastic processing method is used for preparation, due to the plastic deformation of the nickel and aluminum foil materials, the deformation heat may be too high in the local area, which will cause the nickel and aluminum materials to form intermetallic compounds, and the nickel and aluminum nano metal powder will lose its relevant functions.

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