期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2021.141952
关键词
Cu alloys; Nanocomposites; Immiscibility; Electrical conductivity; In situ synthesis; TiB2
In this study, Cu-TiB2 nanocomposites were successfully fabricated using molten salt processing, with the addition of Al and Fe to achieve high strength and electrical conductivity. The detailed microstructure, phase, and electrical studies validate the feasibility of the proposed procedures. This new method offers promising potential for synthesizing and incorporating nano-phase into copper melt for high-performance Cu nanocomposites.
It is of significant interests to enhance the strength of Cu alloys while retaining their good electrical conductivity for broad applications. In situ incorporation of nano-phase into Cu alloys is a promising method for this objective. However, little success has been reported. In this study, we successfully fabricated in situ Cu-TiB2 nanocomposites by a molten salt processing and systematically studied their mechanical and electrical properties. During the processing, Al was used to react and introduce nano- and submicron-size TiB2 efficiently into the copper melt. Immiscible Fe was later added to recover the electrical conductivity through sequential solutionizing, hot rolling, and electrical conductivity-recovering. Detailed microstructure, phase, and electrical studies validate the feasibility of the proposed procedures to achieve high-strength and high-conductivity Cu(-Fe)-TiB2 nanocomposites. Cu-1 wt.% Fe-5 vol% TiB2 offers 554.3 MPa in ultimate tensile strength, 4.4% in ductility, and 62.4% IACS in electrical conductivity. The new method paves an effective way to synthesize and incorporate nano-phase into copper melt for high-performance Cu nanocomposites.
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