超音速气雾化制备FeNi30触媒粉末的表征  

CHARACTERIZATION OF FeNi30 CATALYST POWDER PRODUCED BY SUPERSONIC GAS ATOMIZATION

作　　者：朱盼星[1] 张少明[1] 徐骏[1,2] 朱学新[1] 赵新明[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心,北京100088 [2]北京康普锡威焊料有限公司,北京100088

出　　处：《粉末冶金工业》2009年第3期6-10,共5页Powder Metallurgy Industry

基　　金：科技部科研院所技术开发研究专项基金(批准号:NCSTE-2007-JKZX-054)

摘　　要：利用自行研制的超音速气雾化设备制备了FeNi30触媒粉末,对其粒度分布、形貌及晶体结构等进行了表征。结果表明,粉末平均粒度约为26μm,微分分布曲线呈单峰且接近正态分布。粉末颗粒大部分呈球形或近球形,粒度大的粉末表面相对较为粗糙,有少量卫星球和凹坑,粒度小的粉末表面较为光滑;粉末内部主要有胞状晶、胞状树枝晶和柱状树枝晶等凝固组织,粒度大的粉末主要由胞状晶组成,有少量不发达的枝晶,粒度小的粉末具有较为发达的枝晶,并伴有少量胞状晶;各粒度粉末的晶粒尺寸均较小,基本在1-10μm之间;各粒度粉末均由面心立方结构的FeNi固溶相组成,晶格常数为(0.3586±0.0001)nm,与金刚石的晶格常数接近。FeNi30 catalyst powders were prepared by supersonic gas atomization,characterized by particle size distribution,morphology,microstructure and crystal structure. The mass median diameter of powders was determined to be about 26 μm. The differential distribution of powder size exhibited unimodal form,indicating a good fit to the normal distribution. Almost all of the powders were spherical,or nearly spherical. The surface of big particle was rough, with a few satellites, while the small particle had smooth surface. Three types of solidification structures were observed in the powders： cellular structure, cellular dendrite structure and columnar dendrite structure. The phase of all powders was FeNi solid solution. The crystal structure of powders was fcc,with a lattice constant of 0. 3586±0. 0001 nm,similar to that of diamond.

关 键 词：气雾化 触媒 FeNi 金属粉末 

分 类 号：TB44[一般工业技术]