Development of Atomized Ni-based Powder by Counterrotating Process

近年来，各种快速凝固技术的方法已经发表。然而，这些报道的工艺面临各种问题（污染，低密度，不规则形状，高速旋转）。解决这些问题。我们开发了一种新的雾化过程，它的机制是一个坩埚包围熔融金属和一个冷却盘沿垂直同轴方向相反的方向旋转。这个过程是所谓的离心雾化方法之一。本研究的目的是确定该工艺生产的粉末的性能。采用声波筛和电磁筛对粉末粒度进行了分析。利用扫描电子显微镜和光学显微镜分别确定了颗粒的形状和结构，并用图像分析仪测量了颗粒的圆度。在实验室规模的实验装置上制备了Fe_<82>+B_<18>、高温合金、Pb-Sn和各种材料的球状光滑颗粒，平均直径约为38 - 120 m，并得到了非晶或亚表相（Fe_<82>-B_<18>）。

Recently, various methods of rapid solidification techniques have been published. However, these reported processes face various problems(contamination, low density, iregular shape, very high speed rotation).To solve these problems. we have developed a new atomization process which has a mechanism where a crucible enclosing the molten metal and a cooling disk rotate in opposite directions about a vertical coaxial. This process is one of the so-called centrifugal atomization methods. the pur-pose of this investigation is to define the powder property which is produced by this process. The size analysis of powders was conducted by sonic sieve and electro-magnetic sieve analysis. a scanning electron microscope and an optical microscope were utilized to ascertain particle shape and particle structure, respectively, and the roundness of particles was measured by a image analyzer. Spherical and smooth surfaced particles of Fe_<82>+B_<18>, super-alloy ,Pb-Sn and various materials with an average diameter of about 38 120 m, and the particles to get amorphas or metas-table phases(Fe_<82>-B_<18>) were produced by laboratory-scaled experimental ap-paratus.