Measurement of the Impurity Diffusivity of Cu in Fe by Laser Induced Breakdown Spectrometry
Measurement of the Impurity Diffusivity of Cu in Fe by Laser Induced Breakdown Spectrometry
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激光诱导击穿光谱法测量 Fe 中 Cu 的杂质扩散率
DOI：
10.4028/www.scientific.net/ddf.237-240.266
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发表时间：
2005
影响因子：
--
通讯作者：
T. Okino
中科院分区：
文献类型：
--
作者：
C. Lee;Jung Han Lee;B. Lee;Yong I. Lee;T. Shimozaki;T. Okino
通过激光诱导击穿光谱法 (LIBS) 在 1073 - 1163 K 温度范围内测定了 Cu 在 Fe 中的杂质扩散系数。这项工作中发现的 Cu 杂质在非晶铁中扩散的体积扩散系数与之前发表的结果非常一致。还使用体积扩散率并处理测量轮廓的尾部来计算晶界扩散系数 gb D s d。体积扩散和晶界扩散的活化能值分别约为280 和161 kJmol-1。这表明在体积扩散的情况下单空位扩散机制的可能性。扩散系数的结果为 Dv= 2.2 ×10-2exp(-280 kJmol-1/RT) m2s-1 和 gb D s d = 2.6 ×10-11exp(-161 kJmol-1/RT) m3s-1。
The impurity diffusion coefficients of Cu in Fe have been determined in the temperature range of 1073 - 1163 K by means of Laser Induced Breakdown Spectrometry (LIBS). The volume diffusion coefficients for Cu impurity diffusion in a-iron found in this work are in good agreement with the previously published result. The grain boundary diffusion coefficient gb D s d was also calculated using the volume diffusivity and processing the tails of the measured profiles. The values of the activation energy for volume and grain boundary diffusion were approximately 280 and 161 kJmol-1, respectively. This indicates the possibility of a monovacancy diffusion mechanism in case of volume diffusion. The results for the diffusion coefficients are Dv= 2.2 ×10-2exp(-280 kJmol-1/RT) m2s-1 and gb D s d = 2.6 ×10-11exp(-161 kJmol-1/RT) m3s-1.