Nanoparticle-copper-iron composite alloy, and preparation and use thereof

Abstract

The invention belongs to the field of non-ferrous metal alloy preparation technology and specifically discloses a nanoparticle copper-iron composite alloy, along with its preparation and applications. The method includes the following steps: under a high-temperature protective atmosphere, nanoparticles are added to the molten Cu/Fe alloy through physical or chemical means, mixed, and dispersed evenly. The uniformly mixed Cu/Fe melt containing nanoparticles is then cast into a billet, followed by post-processing of the billet. The nanoparticle copper-iron composite alloy billet prepared by this method has stable chemical composition, with Fe elements distributed uniformly and without segregation. This invention addresses the problem of uneven distribution of Fe precipitate phases in copper-iron alloys, enabling submicron- or even nanoscale uniform distribution of Fe precipitate phases within the copper matrix. Additionally, compared to traditional rapid cooling and powder metallurgy processes, the method is simpler and more suitable for large-scale production.

What is claimed is: 
     
         1 . A preparation method for a nanoparticle copper-iron composite alloy, characterized by comprising the following steps: under a high-temperature protective atmosphere, adding nanoparticles to the molten Cu/Fe alloy by physical and/or chemical means, mixing and dispersing them evenly, then casting the uniformly mixed Cu/Fe melt containing nanoparticles into a billet, followed by post-processing of the billet. 
     
     
         2 . The preparation method according to  claim 1 , characterized in that the physical addition method involves wrapping the nanoparticles in metal foil; and/or the chemical addition method involves a molten salt-assisted process, wherein the molten salt-assisted process includes mixing nanoparticles with molten salt before adding them to the Cu/Fe alloy solution; and/or, after adding the nanoparticles to the molten Cu/Fe alloy, the mixing and dispersing method is mechanical stirring or high-energy ultrasonic stirring. 
     
     
         3 . The preparation method according to  claim 2 , characterized in that the metal foil is iron foil or copper foil. 
     
     
         4 . The preparation method according to  claim 1 , characterized in that the post-processing method involves one or more deformation-aging treatments. 
     
     
         5 . The preparation method according to  claim 1 , characterized in that the mass fraction of Fe in the molten Cu/Fe alloy is 5-50 wt. %.