Since their discovered in 1991, carbon nanotubes have demonstrated many remarkable mechanical, electrical and thermal properties, showing promising potentials in many fields. Carbon nano tubes have attracted world-wide attentions during the years, many research work have been performed during the years. At Tsinghua University, we have reported previously two kinds of research work on laser processing of canbon nanotubes: (1) Connection of macro-sized double-walled carbon nanotube strands by laser irradiation; (2) Light emission from multiwalled carbon nanotubes under CW CO2 laser irradiation. This work is a continuous effort in the research area, which focuses on the structure modification of carbon nano tube powder and film by laser shock peening process. A Q-switched nano second Nd:YAG laser pulse induces a shock wave on metal surface with very high pressure (up to Giga or even tens of Giga pascal), which produces normally plastic deformation and a few hundred MPa of the residual compressive stress on the surface of materials, enhancing the anti-fatigue properties of metals and extending the fatigue life of the processed components. We used laser shock peening to process the carbon nanotube powder and carbon nanotube film to explore the possible structure modification. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Micro Raman Spectrum were used to analyze the morphology and spectrum to identify the structure modification of the carbon nanotube powder and film after laser shock peening process and then to establish the relationship between the process parameters and the structure modification. The research impact and potential applications were discussed based on the research.
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ICALEO 2009: 28th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing
November 2–5, 2009
Orlando, Florida, USA
ISBN:
978-0-912035-59-8
PROCEEDINGS PAPER
Structure modification of carbon nanotube powder and film by laser shock peening process
Liang Lv;
Liang Lv
Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Department of Mechanical Engineering, Tsinghua University
, Beijing 100084, P. R. China
, E-mail: [email protected]
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Minlin Zhong;
Minlin Zhong
Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Department of Mechanical Engineering, Tsinghua University
, Beijing 100084, P. R. China
, E-mail: [email protected]
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Renjie Zhu;
Renjie Zhu
Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Department of Mechanical Engineering, Tsinghua University
, Beijing 100084, P. R. China
, E-mail: [email protected]
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Changsheng Dong;
Changsheng Dong
Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Department of Mechanical Engineering, Tsinghua University
, Beijing 100084, P. R. China
, E-mail: [email protected]
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Wenjin Liu
Wenjin Liu
Key Laboratory for Advanced Materials Processing Technology Ministry of Education, Department of Mechanical Engineering, Tsinghua University
, Beijing 100084, P. R. China
, E-mail: [email protected]
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Published Online:
November 01 2009
Citation
Liang Lv, Minlin Zhong, Renjie Zhu, Changsheng Dong, Wenjin Liu; November 2–5, 2009. "Structure modification of carbon nanotube powder and film by laser shock peening process." Proceedings of the ICALEO 2009: 28th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. ICALEO 2009: 28th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Orlando, Florida, USA. (pp. pp. 1545-1547). ASME. https://doi.org/10.2351/1.5061528
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