In this study, AlSi10Mg alloy powders are synthesized using gas atomization and sieving processes for powder bed fusion (PBF) additive manufacturing. The effect of nozzle diameter (ø = 4.0, 4.5, 5.0 and 8.0 mm) on the gas atomization and sieving size on the properties of the prepared powder are investigated. As the nozzle diameter decreases, the size of the manufactured powder decreases, and the uniformity of the particle size distribution improves. Therefore, the ø 4.0 mm nozzle diameter yields powder with superior properties. Spherically shaped powders can be prepared at a scale suitable for the PBF process with a particle size distribution of 10–45 μm. The Hausner ratio value of the powder is measured to be 1.24. In addition, the yield fraction of the powder prepared in this study is 26.6%, which is higher than the previously reported value of 10–15%. These results indicate that the nozzle diameter and the post-sieve process simultaneously influence the shape of the prepared powder as well as the satellite powder on its surface.

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 고찰
    3.1. 노즐 직경 변화에 따른 분말의 형상 및 입도 분포
    3.2. 분급을 적용한 분말들의 입자 크기에 따른 형상 및입도 분포
    3.3. PBF용 분말의 형상 및 분체 특성
4. 결 론
References

• 임원빈(한국산업기술대학교 생명화학공학과) | Weon Bin Im (Department of Chemical Engineering & Biotechnology, Korea Polytechnic University)
• 박승준(한국산업기술대학교 생명화학공학과) | Seung Joon Park (Department of Chemical Engineering & Biotechnology, Korea Polytechnic University)
• 윤여춘(㈜엠케이티) | Yeo Chun Yun (MKT Co., LTD.)
• 김병철(㈜엠케이티) | Byeong Cheol Kim (MKT Co., LTD.) Corresponding Author