Plasma-assisted preparation and characterization of spherical stainless steel powders
| Autor: | Changming Cheng, Honghui Tong, Fazhan Yang, Hailong Zhu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Morphology (linguistics) Metals and Alloys Nanoparticle Fraction (chemistry) 02 engineering and technology Plasma 021001 nanoscience & nanotechnology 01 natural sciences Bulk density Industrial and Manufacturing Engineering Computer Science Applications Characterization (materials science) Sphericity Modeling and Simulation Phase (matter) 0103 physical sciences Ceramics and Composites Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Processing Technology. 252:559-566 |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/j.jmatprotec.2017.10.010 |
| Popis: | A study of the plasma-assisted rapid melting-spheroidizing-solidification process was carried out for the preparation of micron-sized spherical stainless steel powders. The melting behavior of the in-flight particles was investigated through the particles temperature monitoring with DPV-2000. The morphology, powder size distribution, phase and pore structure, densities and flowability of the raw powder and the as-prepared spherical stainless steel powder were characterized and analyzed comparatively. It was demonstrated that most powder particles were melted into droplets at the designated experimental conditions, whereas the as-prepared stainless steel powder demonstrated excellent sphericity, flowability and monodispersity. A fraction of nanoparticles and hollow powders were produced along with the spherical powder during the plasma process. The apparent density, the tap density, the flowability and the Brunauer–Emmett–Teller surface area of the as-prepared spherical powder were 3.50 g cm −3 , 5.20 g cm −3 , 15.2 s (50 g) −1 , 1.59 m 2 g −1 , respectively, whereas the compositions and powder size distribution had almost no change after plasma treatment. The as-prepared spherical stainless steel powder could be utilized as a candidate powder for additive manufacturing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect