Laser micromachining of CNT/Fe/Al_2O_3 nanocomposites  

作　　者：Kwang-Ryul KIM Byoung-Deog CHOI Jun-Sin YI Sung-Hak CHO Yong-Ho CHOA Dong-Soo SHIN Dong-Ho BAE Myung-Chang KANG Young-Keun JEONG 

机构地区：[1]School of Information and Communication Engineering,Sungkyunkwan University [2]Korea Institute of Machinery and Materials [3]Department of Chemical Engineering,Hanyang University [4]NANOBASE Inc. [5]School of Mechanical Engineering,Sungkyunkwan University [6]National Core Research Center for Hybrid Materials Solution,Pusan National University

出　　处：《中国有色金属学会会刊：英文版》2009年第B09期189-193,共5页Transactions of Nonferrous Metals Society of China

基　　金：supported by a grant from the National Core Research Center Program funded by KOSEF and MOST (R15-2006-022-01001-0 and R15-2006-022-01003-0)

摘　　要：CNT/Fe/Al2O3 mixed powders were synthesized from Fe/Al2O3 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 Al2O3 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.CNT/Fe//Al2O3 mixed powders were synthesized from Fe/Al2O3 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 Al2O3 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.

关 键 词：纳米复合材料 激光光学系统 热化学气相沉积 碳纳米管 AL2O3 扫描电镜分析 均匀分散 纳米粉体 

分 类 号：TB383.1[一般工业技术—材料科学与工程]