| EPSRC Reference: |
GR/S33871/01 |
| Title: |
Self-consistent reformulation of the equations governing solute diffusion in the crystalline state |
| Principal Investigator: |
Howe, Dr A |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Materials Science and Engineering |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 2003 |
Ends: |
30 September 2004 |
Value (£): |
41,653
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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Summary on Grant Application Form |
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The theory and mathematical framework for solid state solute diffusion is apparently well established and in regular use throughout Materials Science. However, there are surprising, basic inconsistencies between commonly used equations, and it has been proposed recently that the whole subject is built upon an imperfect premise, thus complicating its application unnecessarily. An acceptance that the diffusion process is one of atoms jumping between sites and thus that there must be a rigorous analysis derivable on that basis which is wholly consistent with the phenomenological/thermodynamic approach, has led to an alternative paradigm.This claim is described in the proposal, and support is sought for a feasibility study comprising a critical examination of the theory and comparison with existing, classic experimental data from the literature. If confirmed, an assessment is required as to what extent the current paradigm copes through use of phenomenological 'fitting parameters' or whether, as suspected, there are circumstances where the new treatment would lead to substantially different predictions. Also, the treatment will be extended to cases with additional driving forces: thermo-migration (Soret effect), electro-migration, and strain-assisted diffusion (Gorski effect).
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.shef.ac.uk |