双级耦合气雾化制备Ni60A粉末的技术研究  

STUDY ON THE PREPARATION Ni60A POWDER BY GAS ATOMIZATION WITH TWO-STAGE COUPLING

作　　者：张维涛[1] 牛显明[1] 胡春莲[1] 王建民[1] 

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃730050

出　　处：《粉末冶金工业》2012年第5期1-4,共4页Powder Metallurgy Industry

摘　　要：采用双级耦合气雾化法制备Ni60A粉末,并通过激光粒度分析仪﹑扫描电镜等研究了Ni60A粉末的表面形貌、松装密度、及粒度分布。研究结果表明:用双级耦合雾化系统生产的粉末球形度高,存在卫星结构粉末,且细粉末明显增多,空心粉少;松装密度大;粉末粒径分布曲线呈单峰且近似正态分布。还分析了双级喷嘴对雾化过程及粉末粒度的影响机理。Ni60A powder was prepared by Two-stage coupling atomization. The size distribu-tion, apparent density and surface morphologies of the Ni60A powder were investigated by laser scattering particle size distribution analyzer, scanning electron microscopy, respectively. The results show that the two-stage coupling system produced much finer powder with less fault and bigger apparent density, but the powders exists assatellite structure. The differential distribution curve of powder size exhibits unimodal and normal distribution form. Besides, the influence mechanism of the two-stage coupling atomization on atomizing process and particle size was also analyzed.

关 键 词：双级耦合 雾化系统 雾化喷嘴 粉末粒度 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]