Effect of atomization on surface oxide composition in 316L stainless steel powders for additive manufacturing
| Autor: | Dmitri Riabov, Sven Bengtsson, Eduard Hryha, Masoud Rashidi, Lars Nyborg |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Scanning electron microscope Iron oxide Oxide chemistry.chemical_element 02 engineering and technology 01 natural sciences Metal chemistry.chemical_compound X-ray photoelectron spectroscopy Sputtering 0103 physical sciences Materials Chemistry Inert gas 010302 applied physics Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Nitrogen Surfaces Coatings and Films chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Surface and Interface Analysis. 52:694-706 |
| ISSN: | 1096-9918 0142-2421 |
| DOI: | 10.1002/sia.6846 |
| Popis: | The initial oxide state of powder is essential to the robust additive manufacturing of metal components using powder bed fusion processes. However, the variation of the powder surface oxide composition as a function of the atomizing medium is not clear. This work summarizes a detailed surface characterization of three 316L powders, produced using water atomization (WA), vacuum melting inert gas atomization (VIGA), and nitrogen atomization (GA). X‐ray photoelectron spectroscopy (XPS) and scanning electron microscopy analyses were combined to characterize the surface state of the powders. The results showed that the surface oxides consisted of a thin (~4 nm) iron oxide (Fe2O3) layer with particulate oxide phases rich in Cr, Mn, and Si, with a varying composition. XPS analysis combined with depth‐profiling showed that the VIGA powder had the lowest surface coverage of particulate compounds, followed by the GA powder, whereas the WA powder had the largest fraction of particulate surface oxides. The composition of the oxides was evaluated based on the XPS analysis of the oxide standards. Effects of Ar sputtering on the peak positions of the oxide standards were evaluated with the aim of providing an accurate analysis of the oxide characteristics at different etch depths. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text