- Title
- Simultaneous Measurement of Isotope-Free Tracer Diffusion Coefficients and Interdiffusion Coefficients in the Cu-Ni System
- Creator
- Schulz, Esin A.; Mehta, Abhishek; Belova, Irina V.; Murch, Graeme E.; Sohn, Yongho
- Relation
- ARC.DP170101812 http://purl.org/au-research/grants/arc/DP170101812
- Relation
- Journal of Phase Equilibria and Diffusion Vol. 39, Issue 6, p. 862-869
- Publisher Link
- http://dx.doi.org/10.1007/s11669-018-0682-8
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2018
- Description
- A new formalism recently developed by Belova et al., based on linear response theory combined with the Boltzmann–Matano method, allows determination of tracer and interdiffusion coefficients simultaneously from a single, isotope-free, traditional diffusion couple experiment. An experimental methodology with an analytical approach based on the new formalism has been carried out using the model Cu-Ni system to effectively determine tracer diffusion coefficients from an isotope-free diffusion couple experiment. Cu thin films were deposited in between several binary diffusion couples with varying terminal alloy compositions (Cu-25Ni, Cu-50Ni, Cu-75Ni, Ni). Diffusion couples were annealed at 800, 900 and 1000 °C, and the superimposed concentration profiles of thin film and interdiffusion were analyzed for the simultaneous determination of tracer and interdiffusion coefficients. Processed concentration profiles obtained from the diffusion experiments were also fitted with simple Gaussian distribution function. Results were compared to existing literature data obtained independently by radiotracer experiments, and an excellent agreement has been observed.
- Subject
- experimental techniques; interdiffusion; tracer diffusivity
- Identifier
- http://hdl.handle.net/1959.13/1441088
- Identifier
- uon:41316
- Identifier
- ISSN:1547-7037
- Language
- eng
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