Diffusion in a temperature gradient – A single cycle method to determine frequency factor and activation energy of solid diffusion coefficients in alloys
| Autor: | Hannes Engelhardt, Markus Rettenmayr |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Self-diffusion
Molecular diffusion Materials science Polymers and Plastics Diffusion Metals and Alloys Thermodynamics Activation energy Electronic Optical and Magnetic Materials Diffusion layer Temperature gradient Ceramics and Composites Grain boundary diffusion coefficient Effective diffusion coefficient |
| Zdroj: | Acta Materialia. 95:212-215 |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2015.05.045 |
| Popis: | An experimental procedure for determining the temperature dependence of diffusion coefficients in a single diffusion heat treatment is introduced. Diffusion in a temperature gradient in samples with initially symmetric “roof-shaped” concentration profiles of a suitable length scale and concentration range yields asymmetric profiles that allow the determination of the frequency factor D 0 and the activation energy Q D . The binary system Al–Cu is used as an example. The procedure is applicable to alloy systems with finite solute solubility. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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