Evaluation and Suppression of Porosity in Gas-atomized Powders

研究成果: ジャーナルへの寄稿学術誌査読

抄録

Recently, the demand for high-quality gas-atomized powders has increased. Some particles in gas-atomized powders contain internal pores, and the presence of these pores may result in the degradation of various properties of the final product manufactured through a specific process. However, the mechanism of the internal pore formation has not yet been elucidated. In this study, various alloy powders were prepared using the gas atomization method, and their internal pores were observed using synchrotron X-ray CT. The results showed that alloys with a wider solid–liquid coexistence temperature range exhibited a higher porosity–volume ratio. This suggests that gas bubbles are more likely to be entrained during secondary droplet breakup. It was also found that introducing a small amount of hydrogen as a reducing agent into the spray gas reduced these quantities.

本文言語英語
ページ(範囲)S99-S104
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
72
DOI
出版ステータス出版済み - 3月 15 2025

!!!All Science Journal Classification (ASJC) codes

  • 機械工学
  • 産業および生産工学
  • 金属および合金
  • 材料化学

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