Laser micromachining of CNT/Fe/Al sub(2O) sub(3) nanocomposites

CNT/Fe/Al sub(2O) sub(3) mixed powders were synthesized from Fe/Al sub(2O) sub(3) nanopowders using thermal CVD for the homogeneous dispersion of carbon nanotubes CNTs. CNTs consisted of MWNT, and the diameter was approximately 20-30 nm. After sintering, CNTs were homogenously located throughout Al...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2009-09, Vol.19, p.s189-s193
Main Authors: Kim, Kwang-Ryul, Choi, Byoung-Deog, Yi, Jun-Sin, Cho, Sung-Hak, Choa, Yong-Ho, Shin, Dong-Soo, Bae, Dong-Ho, Kang, Myung-Chang, Jeong, Young-Keun
Format: Article
Language:English
Subjects:
Ablation
Aluminum oxide
Iron
Lasers
Micromachining
Multi wall carbon nanotubes
Nanocomposites
Nanostructure
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Summary:CNT/Fe/Al sub(2O) sub(3) mixed powders were synthesized from Fe/Al sub(2O) sub(3) nanopowders using thermal CVD for the homogeneous dispersion of carbon nanotubes CNTs. CNTs consisted of MWNT, and the diameter was approximately 20-30 nm. After sintering, CNTs were homogenously located throughout Al sub(2O) sub(3) grain boundary and were buckled. A femto-second laser installed with special optical systems was used for micromachining of the nanocomposites. The relationship between material ablation rate and energy fluence was theoretically investigated and compared with experimental results from cross-sectional SEM analysis. The nanocomposites which have higher content of CNT show a fairly good machining result due to its higher thermal conductivity and smaller grain size as well as lower light transmittance.
ISSN:1003-6326
DOI:10.1016/S1003-6326(10)60269-5