期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2020.139345
关键词
Cu matrix nanocomposites; Molten salt; WC nanoparticles
类别
资金
- U.S. Army Research Office [W911NF-14-1-0644]
- National Science Foundation
There is a significant demand for Cu-based materials with high strength and high electrical conductivity for a wide range of applications. However, the long-standing trade-off between mechanical properties and electrical conductivity often inhibits the development of such high-performance Cu materials. Cu-based metal matrix nanocomposites (MMNCs) are promising to mitigate this trade-off, but it is extremely difficult to fabricate bulk MMNCs with a uniform nanoparticle dispersion through an economical approach. In this study, a novel molten salt-assisted incorporation method was developed to fabricate bulk Cu-based nanocomposites with uniformly dispersed WC nanoparticles. The mechanical properties, including hardness, strength and Young's modulus, were significantly enhanced without a great sacrifice in electrical conductivity. Furthermore, various salts, including KAlF4, borax, and NaCl, were found effective to incorporate WC nanoparticles into molten Cu. This molten salt-assisted incorporation method paves a pathway for the scalable manufacturing of bulk Cu-based MMNCs with excellent mechanical properties and good electrical conductivity for widespread applications.
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