Skip to main content Accessibility help

Combustion synthesis of ultrafine tungsten carbide powder

  • H.I. Won (a1), H.H. Nersisyan (a1) and C.W. Won (a1)


The synthesis of ultrafine tungsten carbide (WC) powder has been investigated from a WO3 + Mg + C mixture via combustion technique. The values of combustion parameters were estimated over the Mg concentration range 3 to 16 mol. Fast increasing tendency of the WC/W2C phase ratio from Mg concentration has been found in the final products. Phase pure WC was prepared with more than 10 mol Mg, and a small amount of ammonium carbonate (or urea) was blended with the WO3+ C mixture. The effects of the combustion conditions on product morphology and composition were evaluated using scanning electron microscopy and x-ray diffraction analysis. The results of the investigation indicate that carbon-containing compounds significantly enhance the combustion synthesis process; leading to higher conversion efficiencies and phase pure WC formation at 1500–1550 °C. The crystalline particles of WC showed a narrow distribution in particle size, with a mean diameter around 200 nm. The results are discussed in the context of gas-phase and solid-phase transport models.


Corresponding author

a)Address all correspondence to this author. e-mail:


Hide All
1Cao, L.Kear, B.H.: Low temperature carburization of high surface area tungsten powders. Nanostruct. Mater. 5, 555 1995
2Cao, L.Kear, B.H.: Synthesis of nanophase WC powder by a displacement process. Nanostruct. Mater. 9, 205 1997
3McCandlish, L.E., Kear, B.H.Kim, B.K.: Processing and properties of nanostructured WC–Co. Nanostruct. Mater. 1, 119 1992
4Seegopaul, P., McCandlish, L.E.Shinneman, F.M.: Production capability and powder processing methods for nanostructured WC–Co powder. Int. J. Refract. Met. Hard Mater. 15, 133 1997
5Wang, G.M., Millet, P., Calka, A.Campbell, S.J.: Mecanosynthesis of tungsten carbide. Mater. Sci. Forum 179–181, 183 1995
6El-Eskandarany, M.S., Mahday, A.A., Ahmed, H.A.Amer, A.H.: Synthesis and characterizations of ball-milled nanocrystalline WC and nanocomposite WC–Co powders and subsequent consolidations. J. Alloys Compd. 312, 315 2000
7Li, Z.Q., Zhang, H.F., Zhang, X.B., Wang, Y.Q.Wu, X.J.: Nanocrystalline tungsten carbide encapsulated in carbon shell. Nanostruct. Mater. 10, 179 1998
8Lin, M.H.: Synthesis of nanophase tungsten carbide by electrical discharge machining. Ceram. Int. 31, 1109 2005
9Zhang, J., Lee, J.H., Maeng, D.Y.Won, C.W.: Synthesis of tungsten monocarbide by self-propagating high-temperature synthesis in the presence of an activative additive. J. Mater. Sci. 36, 3233 2001
10Nersisyan, H.H., Won, H.I.Won, C.W.: Combustion synthesis of WC powder in the presence of alkali salts. Mater. Lett. 59, 3950 2005
11Nersisyan, H.H., Won, H.I., Won, C.W.Lee, J.H.: Study of the combustion synthesis process of nanostructured WC and WC–Co. Mater. Chem. Phys. 94, 153 2005
12Shiryaev, A.A.: Thermodynamics of SHS processes: Advanced approach. Int. J. SHS 4, 351 1995
13Merzhanov, A.G., Rogachev, A.S., Mukas‘yan, A.S., Khina, B.M., Borovinskaya, I.P.Khina, B.B.: The role of gas phase transport in combustion of tantalum-carbon system. J. Eng. Phys. Thermophys. 59, 809 1990
14Naito, S., Tsuji, M., Sakamoto, Y.Miyao, T. Marked difference of catalystic behavior by preparation methods in CH4 reforming with CO2 over Mo2Cand WC catalysts in Studies in Surface Science and Catalysis,, edited by E. Gaigneaux, D.E. De Vos, P. Grange, P.A. Jacobs, J.A. Martens, P. Ruiz, and G. Poncelet Proc. 8th Int. Symp. on Scientific Bases for the Preparation of Heterogeneous Catalysts (Louvain-la-Neuve, Belgium, 2000) 415–423



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed