期刊
APPLIED SURFACE SCIENCE
卷 268, 期 -, 页码 496-506出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2012.12.155
关键词
Alloyed sintered steels; Water atomized powder; Surface oxides; XPS/AES analysis; Depth profiling; Surface coverage; HR SEM plus EDX analysis
Characterization of oxide products on the surface of water-atomized steel powder is essential in order to determine the reducing conditions required for their removal during the sintering stage which in turn will result in improved mechanical properties. Pre-alloyed powder with 3 wt% Cr and 0.5 wt% Mo was chosen as the model material. Investigation of the powder surface characteristics with regard to composition, morphology, size and distribution of surface oxides was performed using X-ray photoelectron spectroscopy, Auger electron spectroscopy and high resolution scanning electron microscopy combined with X-ray microanalysis. The analysis revealed that the powder is covered by a homogeneous (similar to 6 nm thick) Fe-oxide layer to similar to 94% whereas the rest is covered by fine particulate features with the size below 500 nm. These particulates were further analyzed and were divided into three main categories (i) Cr-based oxides with simultaneous presence of nitrogen, (ii) Si-based oxides of hemispherical shape and (iii) agglomerates of the afore mentioned oxides. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据