Bulk diffusion measurements to study the effectiveness of barrier layers: I. Mathematical treatment

Lei Tian, Michael O. Thompson, Rüdiger Dieckmann, Chung Yuen Hui, Yu-Yun Lin

研究成果: Article同行評審

7 引文 斯高帕斯(Scopus)

摘要

The exchange of a tracer material, e.g., a radioactive isotope, between two samples forming a diffusion couple depends on the rate of the diffusion of the tracer in each of the two samples and also on the rate of the transfer of the tracer across the interface between these samples which may or may not contain a barrier layer with a different chemical composition and/or structure. Diffusion couples with three different initial tracer distributions are considered. In order to extract from experimental data values for tracer diffusion coefficients and for the rate constant for the tracer transport across the interface, a detailed analysis of the required mathematics is given. This analysis is of interest as well for obtaining true values for bulk diffusivities and also to characterize quantitatively the resistance of interfaces (=barriers) to the exchange of certain species. Some examples of experimental results are presented and briefly discussed.

原文English
頁(從 - 到)3799-3809
頁數11
期刊Journal of Applied Physics
90
發行號8
DOIs
出版狀態Published - 2001 十月 1

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)
  • 物理與天文學(雜項)

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