Calculated interdiffusivities resulting from different fitting functions applied to measured concentration profiles in Cu-rich fcc Cu-Ni-Sn alloys at 1073 K
Employing six groups of bulk diffusion couples together with electron probe microanalysis technique, the compositiondependences of ternary interdiffusion coefficients in Cu-rich fcc Cu-Ni-Sn alloys at 1073 K were determined via the Whittle and Green method. Different fitting functions appli...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Technical Faculty, Bor
2017-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2017/1450-53391700022L.pdf |
| Summary: | Employing six groups of bulk diffusion couples together with electron probe
microanalysis technique, the compositiondependences of ternary interdiffusion
coefficients in Cu-rich fcc Cu-Ni-Sn alloys at 1073 K were determined via the
Whittle and Green method. Different fitting functions applied to the measured
concentration profiles are utilized to extract the interdiffusion
coefficients of fcc Cu-Ni-Sn alloys. The errors for the obtained
interdiffusivities are evaluated by a scientific method considering the error
propagation. The calculated diffusion coefficients using the Boltzmann and
additive Boltzmann functions are found to be with reasonable errors and show
a general agreement with those using other fitting functions. Based on the
Boltzmann and additive Boltzmann functions, the interdiffusivities in Cu-rich
fcc Cu-Ni-Sn alloys at 1073 K are obtained and validated by thermodynamic
constraints. The Boltzmann and additive Boltzmann functions are recommended
to be used for the fitting of measured concentration profiles in other
ternary systems for the sake of extracting ternary diffusivities. |
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| ISSN: | 1450-5339 2217-7175 |