Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation of WC Powders by SHS Process in the Presence of Alkali Salts

자전연소합성법에서의 알칼리염을 이용한 WC 분말의 제조

  • Won, Hyung-Il (Rapidly Solidified Materials Research Center (RASOM), Chungnam National University) ;
  • Nersisyan, Hayk (Rapidly Solidified Materials Research Center (RASOM), Chungnam National University) ;
  • Won, Chang-Whan (Rapidly Solidified Materials Research Center (RASOM), Chungnam National University)
  • 원형일 (충남대학교 급속응고신소재연구소) ;
  • ;
  • 원창환 (충남대학교 급속응고신소재연구소)
  • Published : 2007.03.31
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Abstract

Tungsten carbide powder was synthesized by SHS (self-propagating high-temperature synthesis). Except $WO_{3}$, each concentration of raw material ($WO_{3},\;Mg,\;NaCl,\;Na_{2}CO_{3},\;C$) was investigated. Final product was characterized by XRD and SEM. X-ray data demonstrated that the $NaCl+Na_{2}CO_{3}$ combined mixture has superiority in the WC formation process. Single phase and submicrometer WC powder was synthesized at the temperature below $1600^{\circ}C$. The role of sodium salts in combustion process was discussed, and chemical mechanism of WC formation was proposed. WC powder prepared by salt-assisted combustion synthesis has a size $0.2{\sim}3\;{\mu}m$ and low agglomeration degree.

Keywords

References

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