Radiation-induced mixing between metals of low solid solubility
Name
MJD-ActaMater2014.pdf
Size
3.62 MB
Format
Adobe PDF
Checksum (MD5)
085884b672f3b0cc875384efce2b0048
Author(s)
Zhang, Liang
Demkowicz, Michael J.
Date Issued
June 2014
Journal
Acta Materialia
Publisher
Elsevier
Citation
Zhang, L., and M. J. Demkowicz. “Radiation-Induced Mixing Between Metals of Low Solid Solubility.” Acta Materialia 76 (September 2014): 135-150.
Version
Author's final manuscript
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.actamat.2014.05.013
