The Ni-11Mo-8Al-3Ta-2Cr-1Re spherical powders of <150 μm were successfully prepared by the novel technique called supreme-speed plasma rotating electrode process (SS-PREP). The morphology of the atomized powders was observed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). A formation mechanism of some irregular particles appeared in the powders was described and the differences of their microstructures were analyzed by the image-replicating method. The composition differences of the irregular particles were multi-confirmed by EDS. The particle size distribution (PSD) data of the SS-PREP Ni-11Mo-8Al-3Ta-2Cr-1Re powders were well simulated with the newly reported double peak atomization assumption. The relationship between the particle size of the atomized Ni-based powders and the rotating speed of SS-PREP was also discussed and recorded.

通过称为超速等离子旋转电极工艺（SS-PREP）的新技术成功制备了<150μm的Ni-11Mo-8Al-3Ta-2Cr-1Re球形粉末。通过扫描电子显微镜（SEM）和能量分散光谱（EDS）观察雾化粉末的形态。描述了粉末中一些不规则颗粒的形成机理，并通过图像复制方法分析了其微观结构的差异。EDS多次确认了不规则颗粒的组成差异。使用新报道的双峰雾化假设很好地模拟了SS-PREP Ni-11Mo-8Al-3Ta-2Cr-1Re粉末的粒度分布（PSD）数据。