Synthesis of Tungsten Carbide Powders by SHS Method

,; ,; ,; ,; ,; ,; ,; ,

J. Korean Ceram. Soc. > Volume 31(10); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(10): 1159.

SHS법에 의한 탄화텅스텐 분말 합성

전호병, 조덕호¹, 이형복, 박성

명지대학교 무기재료공학과
¹요업기술원

Synthesis of Tungsten Carbide Powders by SHS Method

ABSTRACT

We powders were synthesized from W powders in differnet particle sizes by Self-propagating High-temperature Synthesis process (SHS) using a chemical furnace. The effects of the mole ratio of chemical fuel content, pellet thickness and the mole ratio between carbon and tungsten (C/W Ratio) on synthesis were investigated with the tungsten powders have different particle size each other. Compositional and structural characterization of these powders was carried out by scanning electron microscope (SEM0 and x-ray diffractometer. Powder characterization was carried out by the measurement of particle size distribution with laser-particle size analyzer. The amounts of WC obtained by SHS process depend very much on the particle size of tungsten powder and heat contents given in a product, i.e. as the particle size of W powder is smaller, the amounts of WC produced increase. Also the more heat contents is given, the more amounts of WC increase. By optimizing the synthesis conditions, it is possible to fabricate WC powders which have little secondary phases (W2C, C).