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Multi-walled carbon nanotube-reinforced copper nanocomposite coating fabricated by low-pressure cold spray process |
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| Authors: | Seungchan Cho Kenta Takagi Hansang Kwon Dowon Seo Kazuhiro Ogawa Keiko Kikuchi Akira Kawasaki |
| Affiliation: | 1. Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan;2. Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), Nagoya 463-8560, Japan;3. Advanced Composite Materials Processing, Research Institute of Peace Studies (RIPS), Seoul 135-895, Republic of Korea;4. Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan |
| Abstract: | Multi-walled carbon nanotube (MWCNT)-reinforced copper (Cu) nanocomposite coatings were successfully deposited on aluminum (Al) substrate by a cold spraying process at a low pressure. The microstructure and the Raman spectrum of the low-pressure-cold-sprayed MWCNT–Cu nanocomposite coating showed that the MWCNTs maintained their tube structure in the Cu matrix, even though structural damage to the MWCNTs increased slightly. MWCNT–Cu nanocomposite-coated Al exhibits higher thermal diffusivity than pure-Cu-coated Al with a comparable hardness. The higher thermal diffusivity of the MWCNT–Cu coating could be explained by the dispersion of MWCNTs within the clean and closed CNT/Cu interfaces, which were achieved with the aid of compressive stress during the cold spraying. |
| Keywords: | Cold spray Carbon nanotube Copper Nanocomposite Thermal diffusivity |
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