期刊
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
卷 23, 期 3, 页码 330-338出版社
SPRINGER
DOI: 10.1007/s12613-016-1242-z
关键词
metal matrix composites; aluminum alloys; carbon nanotubes; powder metallurgy; particle size distribution; ball milling; physical properties
类别
资金
- National Natural Science Foundation of China [51405467]
- Research Fund for Scientific and Technological Projects of Chongqing [2012ggB40003, cstc2013yykfC00006]
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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