8–12 Jul 2019
University of Milano-Bicocca UNIMIB
Europe/Rome timezone

P5.3005 Surface plastic of micro-scale tungsten powder for additive manufacturing by thermal plasmas processing

12 Jul 2019, 14:00
2h
Building U6 (University of Milano-Bicocca UNIMIB)

Building U6

University of Milano-Bicocca UNIMIB

Piazza dell’Ateneo Nuovo, 1 20126 Milan, Italy

Speaker

L. Chen (EPS 2019)

Description

See full abstract here http://ocs.ciemat.es/EPS2019ABS/pdf/P5.3005.pdf

The surface of tungsten powder with irregular shape was treated by thermal plasmas and the thermodynamics and dynamics behavior of powder particles in the plasma was monitored by the particle online monitor of DPV2000. The morphologies of the plasma plastic powders was observed by Scanning Electron Microscope (SEM). The results show that the temperature and velocity of tungsten particles decreased with the increasing of axial distance away out of the plasma generator. The morphology of that presented a regular spherical shape and its interior was densified after plasma plastic processing.

This work is supported by National Natural Science Foundation of China (Nos. 11805058, 11535003) and Sichuan Science and Technology Program (No. 2019YFG0444).

References
[1] Kobayashi N, Kawakami Y, Kamada K, et al. Spherical submicron-size copper powders coagulated from a vapor phase in RF induction thermal plasma [J]. Thin Solid Films, 2008, 516(13): 4402-4406.
[2] Liu X p, Wang K s, Hu P, et al. Spheroidization of molybdenum powder by radio frequency thermal plasma [J]. Int. J. Miner. Metall. Mater., 2015, 22(11): 1212-1218.
[3] Wang J J, Hao J J, Guo Z M, et al. Preparation of spherical tungsten and titanium powders by RF induction
plasma processing [J]. Rare Met., 2015, 34(6): 431-435.

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