Radiation-induced mixing between metals of low solid solubility
We use molecular dynamics to study radiation-induced mixing between low solid solubility metals, focusing on the effect of liquid phase properties, by sequentially performing multiple 10 keV collision cascade simulations up to a total dose of ∼5 displacements per atom (dpa). We find mixing to be pro...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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Elsevier
2016
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| Online Access: | http://hdl.handle.net/1721.1/105424 https://orcid.org/0000-0003-3949-0441 |
| _version_ | 1811075451804712960 |
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| author | Zhang, Liang Demkowicz, Michael J. |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Zhang, Liang Demkowicz, Michael J. |
| author_sort | Zhang, Liang |
| collection | MIT |
| description | We use molecular dynamics to study radiation-induced mixing between low solid solubility metals, focusing on the effect of liquid phase properties, by sequentially performing multiple 10 keV collision cascade simulations up to a total dose of ∼5 displacements per atom (dpa). We find mixing to be proportional to the square root of dose, independent of interface crystallography, and highly sensitive to liquid phase interdiffusivity. It occurs primarily by liquid phase interdiffusion in thermal spikes rather than by ballistic displacements. Partial de-mixing is also seen within thermal spikes, regardless of liquid phase solubility. We attribute it to segregation of impurities into the liquid core of the thermal spikes. We present an expression that relates mixing rates to liquid phase heats of mixing and self-diffusivities. |
| first_indexed | 2024-09-23T10:06:12Z |
| format | Article |
| id | mit-1721.1/105424 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:06:12Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1054242023-02-26T02:09:07Z Radiation-induced mixing between metals of low solid solubility Zhang, Liang Demkowicz, Michael J. Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Demkowicz, Michael J Zhang, Liang Demkowicz, Michael J We use molecular dynamics to study radiation-induced mixing between low solid solubility metals, focusing on the effect of liquid phase properties, by sequentially performing multiple 10 keV collision cascade simulations up to a total dose of ∼5 displacements per atom (dpa). We find mixing to be proportional to the square root of dose, independent of interface crystallography, and highly sensitive to liquid phase interdiffusivity. It occurs primarily by liquid phase interdiffusion in thermal spikes rather than by ballistic displacements. Partial de-mixing is also seen within thermal spikes, regardless of liquid phase solubility. We attribute it to segregation of impurities into the liquid core of the thermal spikes. We present an expression that relates mixing rates to liquid phase heats of mixing and self-diffusivities. United States. Dept. of Energy. Office of Basic Energy Sciences (Award Number 2008LANL1026) 2016-11-22T19:26:32Z 2016-11-22T19:26:32Z 2014-06 2014-05 Article http://purl.org/eprint/type/JournalArticle 13596454 http://hdl.handle.net/1721.1/105424 Zhang, L., and M. J. Demkowicz. “Radiation-Induced Mixing Between Metals of Low Solid Solubility.” Acta Materialia 76 (September 2014): 135-150. https://orcid.org/0000-0003-3949-0441 en_US http://dx.doi.org/10.1016/j.actamat.2014.05.013 Acta Materialia Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Demkowicz via Angie Locknar |
| spellingShingle | Zhang, Liang Demkowicz, Michael J. Radiation-induced mixing between metals of low solid solubility |
| title | Radiation-induced mixing between metals of low solid solubility |
| title_full | Radiation-induced mixing between metals of low solid solubility |
| title_fullStr | Radiation-induced mixing between metals of low solid solubility |
| title_full_unstemmed | Radiation-induced mixing between metals of low solid solubility |
| title_short | Radiation-induced mixing between metals of low solid solubility |
| title_sort | radiation induced mixing between metals of low solid solubility |
| url | http://hdl.handle.net/1721.1/105424 https://orcid.org/0000-0003-3949-0441 |
| work_keys_str_mv | AT zhangliang radiationinducedmixingbetweenmetalsoflowsolidsolubility AT demkowiczmichaelj radiationinducedmixingbetweenmetalsoflowsolidsolubility |