기계적 밀링 공정에 의해 제조된 Al-B4C 복합분말의 밀링 거동 연구
Milling Behaviors of Al-B4C Composite Powders Fabricated by Mechanical Milling Process
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In the present work, Al-B4C composite powders were fabricated using a mechanical milling process and its milling behaviors and mechanical properties as functions of B4C sizes (100 μm, 500 nm and 50 nm) and concentrations (1, 3 and 10 wt.%) were investigated. For achieving it, composite powders and their compacts were fabricated using a planetary ball mill machine and magnetic pulse compaction technology. Al-B4C composite powders represent the most uniform dispersion at a milling speed of 200 rpm and a milling time of 240 minutes. Also, the smaller B4C particles were presented, the more excellent compositing characteristics are exhibited. In particular, in the case of the 50 nm B4C added compact, it showed the highest values of compaction density and hardness compared with the conditions of 100μm and 500 nm additions, leading to the enhancement its mechanical properties.
Abstract
In the present work, Al-B4C composite powders were fabricated using a mechanical milling process and its milling behaviors and mechanical properties as functions of B4C sizes (100 μm, 500 nm and 50 nm) and concentrations (1, 3 and 10 wt.%) were investigated. For achieving it, composite powders and their compacts were fabricated using a planetary ball mill machine and magnetic pulse compaction technology. Al-B4C composite powders represent the most uniform dispersion at a milling speed of 200 rpm and a milling time of 240 minutes. Also, the smaller B4C particles were presented, the more excellent compositing characteristics are exhibited. In particular, in the case of the 50 nm B4C added compact, it showed the highest values of compaction density and hardness compared with the conditions of 100μm and 500 nm additions, leading to the enhancement its mechanical properties.
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