Synthesis and Temperature Profile Analysis of ZrC by SHS Method

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J. Korean Ceram. Soc. > Volume 32(6); 1995 > Article

Journal of the Korean Ceramic Society 1995;32(6): 659.

SHS법에 의한 ZrC 합성 및 온도 Profile 분석

이형복, 조건¹, 이재원

명지대학교 무기재료공학과
¹한국과학기술원 무기재료공학과

Synthesis and Temperature Profile Analysis of ZrC by SHS Method

ABSTRACT

Zirconium carbide was prepared from the mixture of metal zirconium and carbon powders in argon atmosphere by Self-propagating High-temperature Synthesis (SHS) in order to obtain the best carbon source and dilution contents. The most exellent result was obtained in the case that active carbon was added as a starting material, 20~30 wt% dilution content. From thermal profile analysis an apparent activation energy of 118 KJ/mol was calculated. The maximum heating rate achieved during 15 wt% ZrC reaction by product dilution method was approximately 1.54$times$105 K/s. Coupling this value with the measured wave velocity of 1.026cm/s yielded a maximum thermal gradient fo $1.5times$105 K/cm. Using the definition of t* and the measured wave velocity, the effective thermal diffusivity, $alpha$, was calculated to be 0.62$times$102 $textrm{cm}^2$/s.

Key words: Zirconium carbide, Thermal profile analysis, Wave velocity, Thermal gradient, Thermal diffusivity