Synthesis of WC Nanosized Powder by the Plasma Arc Discharge Process

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

2086-2088

DOI:

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

Citation:

S. S. Lee et al., "Synthesis of WC Nanosized Powder by the Plasma Arc Discharge Process", Key Engineering Materials, Vols. 336-338, pp. 2086-2088, 2007

Online since:

April 2007

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$35.00

[1] T. Ungar and A. Borbely: Nanostructured Materials Vol. 11 (1999), p.103.

[2] G. Jiang, H. Zhuang and W. Li: J. Alloys Comp. Vol. 387, (2005), p.90.

[3] M. K. Ka, G. H. Ha and B. K. Kim: J. Korean Powder Metall. Inst. Vol. 10 (2003), p.1.

[4] G.G. Lee and S. G. Kim: J. Korean Powder Metall. Inst. Vol. 10 (2003), p.51.

[5] S.I. Cha and S. H. Hong: Mater. Sci. Eng. Vol. A356 (2003), p.381.

[6] R. Dagani: Chem. Eng. News Vol. 23 (1992), p.18.

[7] S. Ashley: Mech. Eng. February (1994), p.52.

[8] L. Gao and B. H. Kear: Nanostructured Mater. Vol. 9 (1997), p.205.

[9] L. Gao and B. H. Kear: Nanostructured Mater. Vol. 9 (1995), p.555.

[10] Z. Q. Li, H. F. Zhang, X. B. Zhang, et al.: Nanostructured Mater. Vol. 10 (1998), p.178.

[11] M. Malli and E. Hillnhangen: Prakt. Metallography (1967), p.16. Fig. 4. XRD reflection pattern of the WC nanosized powders as plasma arc discharged. (a) as synthesized, (b)and (c) post heat treatment.

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