Abstract— This paper deals with the formation of tungsten carbide nano size powder from WO3 + Zn + C system by mechano-chemical synthesis technique that Zn powders are as reduction agent in this system. To obtain this mechanism at first the tungsten oxide that made from APT thermal decomposition powders, were mixed with blended Zn-C powders and milled for different times. In order to determine the effect of carbonate on formation of tungsten carbide, the sodium carbonate powders were introduced to this system and the result from this experimentation has been compare with the sample without sodium carbonate . The end products were characterized by X-ray diffraction. X-ray data demonstrate the superiority of the Na2CO3 in the tungsten carbide formation processes. Tungsten carbide nano sized powders were synthesized during 48 hours ball milling. Using Schrere equation the particle size of tungsten carbide has been calculated at nano scale.

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