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Refinement Behavior of Coarse Magnesium Powder by High Energy Ball Milling (HEBM)
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HOME > J Korean Powder Metall Inst > Volume 17(4); 2010 > Article
고에너지 밀링공정을 이용한 조대 마그네슘 분말의 미세화 거동
송준우, 김효섭, 김홍물, 김택수, 홍순직
Refinement Behavior of Coarse Magnesium Powder by High Energy Ball Milling (HEBM)
Joon-Woo Song, Hyo-Seob Kim, Hong-Moule Kim, Taek-Soo Kim, Soon-Jik Hong
Journal of Korean Powder Metallurgy Institute 2010;17(4):302-311
DOI: https://doi.org/10.4150/KPMI.2010.17.4.302
1공주대학교 신소재공학부 및 희소금속 연구소
2공주대학교 신소재공학부 및 희소금속 연구소
3(주)하나산업
4한국생산기술연구원
5공주대학교 신소재공학부 및 희소금속 연구소
1Division of Advanced Materials Engineering & Institute for Rare Metals, Kongju National University
2Division of Advanced Materials Engineering & Institute for Rare Metals, Kongju National University
3Hana Industries Co., Ltd.
4Dept. Of Echo-materials and processing, Korea Institute of Industrial Technology (KITECH)
5Division of Advanced Materials Engineering & Institute for Rare Metals, Kongju National University
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In this research, the refinement behavior of the coarse magnesium powders fabricated by gas atomization was investigated as a function of milling time using a short duration high-energy ball milling equipment, which produces fine powders by means of an ultra high-energy within a short duration. The microstructure, hardness, and formability of the powders were investigated as a function of milling time using X-ray diffraction, scanning electron microscopy, Vickers micro-hardness tester and magnetic pulsed compaction. The particle morphology of Mg powders changed from spherical particles of feed metals to irregular oval particles, then platetype particles, with increasing milling time. Due to having HCP structure, deformation occurs due to the existence of the easily breakable C-axis perpendicular to the base, resulting in producing plate-type powders. With increasing milling time, the particle size increased until 5 minutes, then decreased gradually reaching a uniform size of about 50 micrometer after 20 minutes. The relative density of the initial power was 98% before milling, and mechanically milled powder was 92~94% with increase milling time (1~5 min) then it increased to 99% after milling for 20 minutes because of the change in particle shapes.


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