کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7965314 | 1514180 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of ion beam rastering on the swelling of self-ion irradiated pure iron at 450 °C
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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![عکس صفحه اول مقاله: The influence of ion beam rastering on the swelling of self-ion irradiated pure iron at 450 °C The influence of ion beam rastering on the swelling of self-ion irradiated pure iron at 450 °C](/preview/png/7965314.png)
چکیده انگلیسی
Ion beam scanning or “rastering” is a technique that is frequently used to uniformly cover a larger specimen area during ion irradiation. In this study, we addressed the effects of rastered and defocused beams, using 3.5 MeV iron ions to irradiate pure iron at 450 °C to peak doses of 50 and 150 dpa. We focused on a frequency range relevant to pulsed fusion devices and show its importance to ion irradiation experiments used for simulating neutron damage. The beam was scanned at 15.6, 1.94, and 0.244 Hz and the resulting microstructure was compared with that produced by a non-rastered, defocused beam. At 150 dpa, the defocused beam case resulted in the highest observed void swelling of â¼12% at a depth of â¼700 nm, a depth short of the peak dose position at 1000 nm. The swelling at the peak dose position was significantly reduced by the defect imbalance phenomenon. A maximum swelling rate of â¼0.12%/dpa was measured in this specimen at a depth of 600 nm below the ion-incident surface. Rastering led to much lower swelling levels achieved at significantly lower swelling rates, with the greatest rate of decrease occurring below â¼1 Hz. Furthermore, the impact of the defect imbalance arising from interstitial injection and spatial distribution difference of initial interstitial and vacancy defects was strongly pronounced in the non-rastered case with a lesser effect observed with decreasing raster frequency.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 465, October 2015, Pages 343-348
Journal: Journal of Nuclear Materials - Volume 465, October 2015, Pages 343-348
نویسندگان
Jonathan G. Gigax, Eda Aydogan, Tianyi Chen, Di Chen, Lin Shao, Y. Wu, W.Y. Lo, Y. Yang, F.A. Garner,