Paper Title:
Measurement of the Impurity Diffusivity of Cu in Fe by Laser Induced Breakdown Spectrometry
  Abstract

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.

  Info
Periodical
Defect and Diffusion Forum (Volumes 237-240)
Edited by
M. Danielewski, R. Filipek, R. Kozubski, W. Kucza, P. Zieba, Z. Zurek
Pages
266-270
DOI
10.4028/www.scientific.net/DDF.237-240.266
Citation
C. G. Lee, J. H. Lee, B. S. Lee, Y. I. Lee, T. Shimozaki, T. Okino, "Measurement of the Impurity Diffusivity of Cu in Fe by Laser Induced Breakdown Spectrometry", Defect and Diffusion Forum, Vols. 237-240, pp. 266-270, 2005
Online since
April 2005
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