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Metals 2015, 5(4), 2058-2069; doi:10.3390/met5042058

Control of the Nano-Particle Weight Ratio in Stainless Steel Micro and Nano Powders by Radio Frequency Plasma Treatment

1
Powder & Ceramics Division, Korea Institute of Materials Science, Changwon 642-831, Korea
2
Department of Electrical Engineering, Pusan National University, Busan 609-735, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Hideshi Miura and Seong Jin Park
Received: 14 October 2015 / Revised: 2 November 2015 / Accepted: 2 November 2015 / Published: 6 November 2015
(This article belongs to the Special Issue Metal Injection Moulding)
View Full-Text   |   Download PDF [637 KB, uploaded 6 November 2015]   |  

Abstract

This study describes how to make stainless steel hybrid micro-nano-powders (a mixture of micro-powder and nano-powder) using an in situ one-step process via radio frequency (RF) thermal plasma treatment. Nano-particles attached to micro-powders were successfully prepared by RF thermal plasma treatment of stainless steel powder with an average size of 35 μm. The ratio of nano-powders is estimated with a two-dimensional fluid simulation that calculates the temperature profile influencing the rate of surface evaporation. The simulation is conducted to determine the variation of the input power and the distance from the plasma torch to the feeding nozzle. It was demonstrated experimentally that the nano-powder ratio in the micro-nano-powder mixture can be controlled by adjusting the feeding rate, plasma power, feeding position and quenching effect during plasma treatment. The ratio of nano-particles in the micro-nano-powder mixture was controlled in a range from 0.1 (wt. %) to 30.7 (wt. %). View Full-Text
Keywords: metal powder; micro-/nano-powder; RF plasma treatment; metal injection molding; microelectronics; stainless steel metal powder; micro-/nano-powder; RF plasma treatment; metal injection molding; microelectronics; stainless steel
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Yang, D.-Y.; Kim, Y.; Hur, M.Y.; Lee, H.J.; Kim, Y.-J.; Lim, T.-S.; Kim, K.-B.; Yang, S. Control of the Nano-Particle Weight Ratio in Stainless Steel Micro and Nano Powders by Radio Frequency Plasma Treatment. Metals 2015, 5, 2058-2069.

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