| SHS 법에 의한 $Ti5_Si_3$의 합성시 온도 Profile 분석 |
| 김도경, 이형직1, 김익진2, 이형복 |
명지대학교 무기재료공학과
1강릉대학교 재료공학과
2한서대학교 재료공학과 |
| Temperature Profile Analysis of $Ti5_Si_3$ in Self-Propagating High Temperature Synthesis |
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| ABSTRACT |
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An analysis of the use of temperature profiles in the determination of the kinetic parameters of combustion synthesis of Ti5Si3 were investigated. From profile analysis, an apparent activation energy of 12KJ/mol was calculated. The Maximum heating rate achieved during 10wt% Ti5Si3 reaction by the product dilution method was approximately $1.5times$104 K/s. Coupling this value with the measured wave velocity of 7.02 cm/s yields a maximum thermal gradient of 2.14$times$103 K/cm. The value of tr (=t*) was calculated to be 1.2$times$10-1 s and the value of td (=tx) was calculated to be 32.89 s. Using the definition of t* and the measured wave velocity, the effective thermal diffusivity, $alpha$, was calculated to be 0.59$times$10 $textrm{cm}^2$/s. From these analysis, the power function, G, was also calculated. |
| Key words:
Temperature profile, Kinetic parameter, Combustion synthesis, $Ti5_Si_3$, Activation energy, Thermal diffusivity, Power function |
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