TITLE

Strong and ductile nanostructured Cu-carbon nanotube composite

AUTHOR(S)
Hongqi Li; Misra, Amit; Horita, Zenji; Koch, Carl C.; Mara, Nathan A.; Dickerson, Patricia O.; Yuntian Zhu
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/17/2009, Vol. 95 Issue 7, p071907
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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.
ACCESSION #
43887422

 

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