Preparation of CNT/AlSi10Mg composite powders by high-energy ball milling and their physical properties |
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| Authors: | Lin-zhi Wang Ying Liu Wen-hou Wei Xu-guang An Tao Zhang Ya-yun Pu |
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| Institution: | 1. College of Materials Science and Engineering, Sichuan University, Chengdu 610065,China;Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences, Chongqing 400714, China;2. College of Materials Science and Engineering, Sichuan University, Chengdu 610065,China;3. Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences, Chongqing 400714, China;4. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China |
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| Abstract: | This study investigated the effects of carbon nanotube (CNT) concentration on the micro-morphologies and laser absorption properties of CNT/AlSi10Mg composite powders produced by high-energy ball milling. A scanning electron microscope, X-ray diffractometer, laser particle size analyzer, high-temperature synchronous thermal analyzer, and UV/VIS/NIR spectrophotometer were used for the analysis of micrographs, phases, granulometric parameters, thermal properties, and laser absorption properties of the composite powders, respectively. The results showed that the powders gradually changed from flake- to granule-like morphology and the average particle size sharply decreased with increases in milling rotational speed and milling time. Moreover, a uniform dispersion of CNTs in AlSi10Mg powders was achieved only for a CNT content of 1.5wt%. Laser absorption values of the composite powders were also observed to gradually increase with the increase of CNT concentration, and different spectra displayed characteristic absorption peaks at a wavelength of approximately 826 nm. |
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| Keywords: | metal matrix composites aluminum alloys carbon nanotubes powder metallurgy particle size distribution ball milling physical properties |
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