In order to meet the industrial manufacturing requirements for high-quality powders, a novel hybrid method for the preparation of spherical fine metal powders by centrifugal atomization of mono-sized droplets obtained by the pulsated orifice ejection method was proposed. The Sn–Pb powders with small size, narrow size distribution, high sphericity, and no satellite powders were obtained by this method. The impact of different process parameters on the powder size, particle size distribution, and powder morphology was investigated. The powder size decreased with the increase of the disk diameter, melting temperature, and rotation speed, and the size of the powder particles exhibited a normal bimodal distribution. The width of the liquid flow lines on the rotation disk was expected to be proportional to the size of the powder. The smallest median particle size D₅₀ of the powders obtained was 21.3 μm with the disk diameter of 15 mm, the melting temperature was 573 K, and the rotation speed was 48000 r/min. The difference between the experimental and theoretical values of the particle sizes was analyzed as well. The median diameter D₅₀ is smaller by a considerable margin compared to traditional theoretical values. In addition, the disintegration mode of the liquid film during the atomization process was also discussed. The direct drop formation mode was considered to exist in this novel method that suggests the possibility to implement the microrefinement and improve the controllability of metal powder preparation.

为了满足工业生产高品质粉末的要求，提出了一种新的混合方法，该方法通过对通过脉冲孔口喷射法获得的单一尺寸的液滴进行离心雾化来制备球形金属细粉。这种方法制得的Sn-Pb粉末尺寸小，尺寸分布窄，球形度高且没有卫星粉末。研究了不同工艺参数对粉末尺寸，粒度分布和粉末形态的影响。随着圆盘直径，熔融温度和旋转速度的增加，粉末尺寸减小，并且粉末颗粒的尺寸表现出正态双峰分布。旋转盘上的液体流线的宽度预期与粉末的尺寸成比例。所得粉末中的₅₀种为21.3μm，盘直径为15mm，熔融温度为573K，旋转速度为48000r / min。还分析了粒径的实验值与理论值之间的差异。与传统理论值相比，中值直径D ₅₀小得多。此外，还讨论了雾化过程中液膜的崩解模式。认为这种新方法中存在直接液滴形成模式，这表明可以进行微细化并提高金属粉末制备的可控性。