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http://dx.doi.org/10.3740/MRSK.2013.23.2.89

Grinding Behaviour of Aluminum Powder for Al/CNTs Nano Composites Fabrication by Dry Grinding Process Using a High Speed Planetary Ball Mill  

Choi, Heekyu (Engineering Research Center(ERC) for Integrated Mechtronics Materials and Components in Changwon National University)
Lee, Jehyun (Engineering Research Center(ERC) for Integrated Mechtronics Materials and Components in Changwon National University)
Kim, Seongsoo (HAJI Eng.)
Choi, Gyungpil (Department of Metallurgy & Advanced Materials Engineering in Changwon National University)
Bae, Daehyung (Department of Metallurgy & Advanced Materials Engineering in Changwon National University)
Lee, Sungbak (Department of Metallurgy & Advanced Materials Engineering in Changwon National University)
Lee, Woong (Department of Metallurgy & Advanced Materials Engineering in Changwon National University)
Publication Information
Korean Journal of Materials Research / v.23, no.2, 2013 , pp. 89-97 More about this Journal
Abstract
The study of grinding behavior characteristics on aluminum powders and carbon nano tubes (CNTs) has recently gained scientific interest due to their useful effect in enhancing advanced nano materials and components, which significantly improves the property of new mechatronics integrated materials and components. We performed a series of dry grinding experiments using a planetary ball mill to systematically investigate the grinding behavior during Al/CNTs nano composite fabrication. This study focused on a comparative study of the various experimental conditions at several variations of rotation speeds, grinding time and with and without CNTs. The results were monitored for the particle size distribution, median diameter, crystal structure from XRD pattern and particle morphology at a given grinding time. It was observed that pure aluminum powders agglomerated with low rotation speed and completely enhanced powder agglomeration. However, Al/CNTs composites were achieved at maximum experiment conditions (350 rpm, 60 min.) of this study by a mechanical alloy process for Al/CNTs mixed powders because the grinding behavior of Al/CNTs composite powder was affected by addition of CNTs. Indeed, the powder morphology and crystal size of the composite powders changed more by an increase of grinding time and rotation speed.
Keywords
Al/CNTs nano composite; planetary ball mill; mechanical alloy; particle size distribution; powder morphology;
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