Synthesis of WC Nanosized Powder by the Plasma Arc Discharge Process

Seoung Soo Lee; Dong Won Joo; Yeon-Gil Jung; Chul Jin Choi

doi:10.4028/www.scientific.net/KEM.336-338.2086

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 336-338Synthesis of WC Nanosized Powder by the Plasma Arc...

Synthesis of WC Nanosized Powder by the Plasma Arc Discharge Process

Abstract:

WC nanosized powders are synthesized by the plasma arc discharge process and annealing under an inert (Ar) atmosphere. The high temperature used during discharging at local region causes the work-piece and electrode to melt and evaporate. The melted tungsten on the arc discharge electrode and carbon arising from decomposition CH4 gas forms WC1-x nanosized powders. The WC1-x phase is encapsulated in a amorphous carbon shell. The WC1-x nanosized particles are annealed at 1200~1400°C under an Ar atmosphere. The WC1-x nanosized powder is transformed to the W2C phase, and then it becomes WC above at 1400°C.

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Periodical:

Key Engineering Materials (Volumes 336-338)

Pages:

2086-2088

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.336-338.2086

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Online since:

April 2007

Authors:

Seoung Soo Lee, Dong Won Joo, Yeon-Gil Jung, Chul Jin Choi

Keywords:

Nanosized Powder, Plasma Arc Discharge, Tungsten Carbide, X-Ray Diffraction (XRD)

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