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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Thermal expansion of MWCNT-reinforced copper composite
XU Long-shan(许龙山), CHEN Xiao-hua(陈小华), PAN Wei-ying(潘伟英), LI Wen-hua(李文华),
YANG Zhi(杨  植), PU Yu-xing(蒲玉兴), YI Guo-jun (易国军) , YI Bin(易  斌), ZHANG Ke(张 

College of Materials Science and Engineering, Hunan University, Changsha 410082, China

Abstract:Multi-walled carbon nanotube (MWCNT)-reinforced copper composite was fabricated by a novel method, which involves solution phase synthesis of MWCNT-implanted cuprous oxide composite spheres, formation of MWCNT/ copper composite spheres after reduction in H2 atmosphere and preparation of the MWCNT/copper bulk with vacuum hot pressing. The SEM images of the fracture surfaces indicate that MWCNTs are homogeneously dispersed in the composite and bonded to the matrix. In addition, the thermal expansion of the composites with various MWCNT contents (0%, 1% and 5%, mass fraction) were investigated. The coefficient of thermal expansion (CTE) decreases with increasing MWCNT content, which are all much lower than that of pure copper.

 

Key words: carbon nanotubes; copper; composite; thermal expansion

ISSN 1672-7029
CN 43-1423/U

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