| EPSRC Reference: |
GR/R07455/01 |
| Title: |
The Influence of Radiation Damage On Stem Chemical Microanalysis |
| Principal Investigator: |
Bacon, Professor DJ |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
School of Engineering |
| Organisation: |
University of Liverpool |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
19 November 2001 |
Ends: |
18 November 2004 |
Value (£): |
157,191
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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| Related Grants: |
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| Panel History: |
| Panel Date | Panel Name | Outcome |
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26 Oct 2000
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Structural Materials
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Deferred
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Summary on Grant Application Form |
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In STEM chemical microanalysis an intense electron beam is passed through a thin specimen and the x-rays excited or the energy losses in the electron beam are monitored and converted to a chemical composition. The electron beam can be reduced to 0.5nm and chemical analysis on this scale is therefore possible. Above a certain (fairly low) beam voltage the electron beam sputters atoms from the surface of the specimen. The lighter atoms are sputtered preferentially, which changes the apparent chemical composition. It has recently been shown that the preferentiality itself varies around secondary defects like grain boundaries, which give apparent segregation profiles where none really exists.In this project the surface sputtering in Ni3Al will be modelled at Liverpool by a PDRA using molecular dynamics and parallel experiments will be performed at Birmingham by a PGRS. The calculation and experiments will involve: (i) predicting surface sputtering and composition changes, (ii) investigating differential sputtering across antiphase domain boundaries and grain boundaries, (iii) investigating the effect of carbon and gold caps on the surface and (iv) developing a strategy for managing this problem.
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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 |
| Summary |
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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.liv.ac.uk |