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<p>Al-Si-Cu-Zn-Ti powder filler was fabricated using planetary ball milling method. The effects of the ball-to-powder ratio, milling time, and milling speed on the particle size distribution and morphology of the powder were systematically investigated. The properties of powder filler were characterized using laser diffraction particle size analyzer, scanning electron microscope, oxygen–nitrogen–hydrogen analyzer and differential scanning calorimeter. Experimental results indicated that the optimal ball-to-powder ratio was 10:1 for maximum milling efficiency. An increase in milling speed significantly contributed to the refinement of the filler, with further size reduction achieved by extending the milling time. Under optimal conditions, specifically a milling speed of 400&#xa0;rpm and a milling time of 6&#xa0;h, the powder exhibited a uniform particle size distribution with near-spherical morphology. The oxygen content of the powder was reduced to 0.070%, and the melting point decreased to 519.34&#xa0;°C, contributing to improved brazing performance and high-quality joint formation.</p>

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Fabrication of Powder Filler and Evaluation of Its Brazing Performance Using Planetary Ball Milling Method

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Zeng Gao,
  • Mengxin Huang,
  • Yujie Qiu,
  • Erzhen Mu,
  • Dechao Qiu

摘要

Al-Si-Cu-Zn-Ti powder filler was fabricated using planetary ball milling method. The effects of the ball-to-powder ratio, milling time, and milling speed on the particle size distribution and morphology of the powder were systematically investigated. The properties of powder filler were characterized using laser diffraction particle size analyzer, scanning electron microscope, oxygen–nitrogen–hydrogen analyzer and differential scanning calorimeter. Experimental results indicated that the optimal ball-to-powder ratio was 10:1 for maximum milling efficiency. An increase in milling speed significantly contributed to the refinement of the filler, with further size reduction achieved by extending the milling time. Under optimal conditions, specifically a milling speed of 400 rpm and a milling time of 6 h, the powder exhibited a uniform particle size distribution with near-spherical morphology. The oxygen content of the powder was reduced to 0.070%, and the melting point decreased to 519.34 °C, contributing to improved brazing performance and high-quality joint formation.