کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1816408 | 1025684 | 2007 | 7 صفحه PDF | دانلود رایگان |
Displacement cascades are simulated by molecular dynamics methods in α-Fe containing different concentrations of substitutional He atoms. Primary knock-on atom (PKA) energies, Ep, from 0.5 to 5 keV are considered at the irradiation temperature of 100 K. The concentration of He in Fe varies from 1 to 5 at%, and the results are compared with the simulations performed in pure α-Fe. We find that the total number of point defects increases with increasing He concentration. The present studies reveal the formation and the configurations of He–vacancy clusters in the cascades of α-Fe. Furthermore, the production efficiency of He–vacancy clusters increases with increasing He concentration and PKA energy. The nucleation mechanisms of He–vacancy clusters in displacement cascades are discussed in detail.
Journal: Physica B: Condensed Matter - Volume 391, Issue 1, 15 March 2007, Pages 179–185