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

73 Scopus citations


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 (US)
Article number071907
JournalApplied Physics Letters
Issue number7
StatePublished - 2009
Externally publishedYes

Bibliographical note

Funding Information:
This study was supported by the DOE, Office of Science, Office of Basic Energy Sciences. ZH appreciates the support of Kyushu University P&P program. The authors gratefully acknowledge John Kennison for his assistance in performing powder compaction.

Fingerprint Dive into the research topics of 'Strong and ductile nanostructured Cu-carbon nanotube composite'. Together they form a unique fingerprint.

Cite this