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<p>Powder flowability plays a crucial role in determining the quality of the as-fabricated parts using near-net-shape technologies such as powder-based additive manufacturing, metal injection molding, and hot isostatic pressing. Intensive studies have focused on the influence of individual factor on flowability, while overall evaluation considering multiple factors remains limited. In this study, irregular-shaped hydride–dehydride titanium powders were modified using three technologies, including gas fluidizing, ball milling, and jet milling, to achieve quasi-spherical powders, with the gas-atomized powder for comparison. The effects of sphericity, particle size distribution, surface roughness, Zeta potential, and humidity on powder flowability were systematically investigated. Based on Pearson correlation analysis and linear regression modeling, the relative influence of each factor on powder flowability can be ranked as follows: sphericity &gt; humidity &gt; particle size distribution &gt; surface roughness &gt; Zeta potential. These findings provide valuable theoretical guidance for the preparation, utilization, and storage of powders in near-net-shape manufacturing processes.</p>

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Insights into Influences on the Flowability of Titanium Powders

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • Yifan Nie,
  • Zhiwei You,
  • Muhammad Dilawer Hayat,
  • Jianan Chen,
  • Chang Liu,
  • Gang Chen,
  • Mingli Qin,
  • Xuanhui Qu

摘要

Powder flowability plays a crucial role in determining the quality of the as-fabricated parts using near-net-shape technologies such as powder-based additive manufacturing, metal injection molding, and hot isostatic pressing. Intensive studies have focused on the influence of individual factor on flowability, while overall evaluation considering multiple factors remains limited. In this study, irregular-shaped hydride–dehydride titanium powders were modified using three technologies, including gas fluidizing, ball milling, and jet milling, to achieve quasi-spherical powders, with the gas-atomized powder for comparison. The effects of sphericity, particle size distribution, surface roughness, Zeta potential, and humidity on powder flowability were systematically investigated. Based on Pearson correlation analysis and linear regression modeling, the relative influence of each factor on powder flowability can be ranked as follows: sphericity > humidity > particle size distribution > surface roughness > Zeta potential. These findings provide valuable theoretical guidance for the preparation, utilization, and storage of powders in near-net-shape manufacturing processes.