Strong and ductile nanostructured Cu-carbon nanotube composite

Hongqi Li, Amit Misra, Zenji Horita, Carl C. Koch, Nathan A. Mara, Patricia O. Dickerson, Yuntian Zhu

    Research output: Contribution to journalArticlepeer-review

    78 Citations (Scopus)

    Abstract

    Nanocrystalline carbon nanotube (CNT)-reinforced Cu composite (grain size <25 nm) with high strength and good ductility was developed. Pillar testing reveals that its strength and plastic strain could be as large as 1700 MPa and 29%, respectively. Compared with its counterpart made under the same condition, an addition of 1 wt % CNTs leads to a dramatic increase in strength, stiffness and toughness without a sacrifice in ductility. Microstructural analysis discloses that in the Cu matrix, CNTs could be distributed either at grain boundaries or inside grains and could inhibit dislocation nucleation and motion, resulting in an increase in the strength.

    Original languageEnglish
    Article number071907
    JournalApplied Physics Letters
    Volume95
    Issue number7
    DOIs
    Publication statusPublished - 2009

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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