Local surface segregations of implanted aluminum in an iron crystal with a low density of defects |
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Authors: | V I Lavrent’ev A D Pogrebnyak R Sandrik |
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Institution: | (1) Sumy Institute of Surface Modification, 244030 Sumy, Ukraine;(2) Nuclear Physics, Oxford University, Oxford, OX 3RH, UK |
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Abstract: | The surface distribution of elements is studied by scanning a 3-MeV proton beam along the surface of a bcc-Fe sample implanted
with aluminum ions in the dose interval (1–50) · 1016 cm−2. Ring-shaped regions, up to 30 μm in diameter, with a high density of aluminum, which appear at implantation doses (5–20) · 1016 cm−2, are observed. These regions appear as a result of radiation-stimulated segregation processes. A mechanism based on the existence
of a low density of dislocations in the initial crystal is proposed to explain the implanted impurity segregation processes.
Pis’ma Zh. éksp. Teor. Fiz. 65, No. 1, 86–89 (10 January 1997) |
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