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| Abstract No.: |
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Scheduled at:
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Tuesday, May 04, 2010, Sophia Room 9:40 AM
Nanomaterial Coatings 1
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| Title: |
Integrated property evaluation of kinetic and thermal sprayed multi-walled carbon nanotube reinforced copper composite coatings
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| Authors: |
Kicheol Kang* / Kinetic Spray Coating Laboratory, Division of Materials Science and Engineering, Hanyang University, Korea
Junghwan Kim / Kinetic Spray Coating Laboratory (NRL), Division of Materials Science & Engineering, Hanyang University, Korea
Gyuyeol Bae/ Kinetic Spray Coating Laboratory (NRL), Division of Materials Science & Engineering, Hanyang University, Korea
Changhee Lee/ Kinetic Spray Coating Laboratory (NRL), Division of Materials Science & Engineering, Hanyang University, Korea
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| Abstract: |
Multi-walled carbon nanotube (MWCNT) reinforced copper composite powders were successfully deposited via kinetic and thermal spraying processes, such as high velocity oxygen fuel (HVOF) spraying and atmospheric plasma spraying (APS). While the kinetic spraying utilizes the kinetic energy of in-flight particles for the deposition, the main energy for the deposition of the thermal spraying is the thermal energy supplied from the thermal flame. According to the deposition mechanism of each spraying process, microstructure of the MWCNT reinforced copper composite coatings and MWCNT structure in the copper matrix were different. Based on microstructure analysis, the electrical and mechanical properties, e.g., electrical resistivity, elastic modulus and micro-hardness, of kinetic and thermal sprayed MWCNT reinforced copper composite coatings were evaluated. Kinetic sprayed MWCNT reinforced copper coating showed the higher electrical and mechanical properties compared with thermal sprayed MWCNT reinforced copper coatings. These results are mainly related to the MWCNT state in the copper matrix and the contribution of the MWCNTs based on their high electrical conductivity, dispersion hardening and anchoring effects. In this study, the relationship among the properties and interaction of MWCNTs with the copper matrix were experimentally and theoretically discussed.
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