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High-strength and high-conductivity in situ Cu–TiB 2 nanocomposites

Materials Science and Engineering: A, ISSN: 0921-5093, Vol: 831, Page: 141952
2022
  • 50
    Citations
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    Usage
  • 16
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    50
    • Citation Indexes
      50
  • Captures
    16

Article Description

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–TiB 2 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 TiB 2 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)-TiB 2 nanocomposites. Cu-1 wt.% Fe-5 vol% TiB 2 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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