کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7964091 | 1514167 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dislocation-mediated trapping of deuterium in tungsten under high-flux high-temperature exposures
ترجمه فارسی عنوان
تله آمپول دایتریم در تنگستن تحت تأثیر قرار گرفتن در معرض هوا با شدت جریان
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کلمات کلیدی
جابجایی، تنگستن، نگهداری، هیدروژن،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
چکیده انگلیسی
The effect of severe plastic deformation on the deuterium retention in tungsten exposed to high-flux low-energy plasma (flux â¼1024Â mâ2Â sâ1, energy â¼50Â eV and fluence up to 5Â ÃÂ 1025Â D/m2) was studied experimentally in a wide temperature range (460-1000Â K) relevant for application in ITER. The desorption spectra in both reference and plastically-deformed samples were deconvoluted into three contributions associated with the detrapping from dislocations, deuterium-vacancy clusters and pores. As the exposure temperature increases, the positions of the release peaks in the plastically-deformed material remain in the same temperature range but the peak amplitudes are altered as compared to the reference material. The desorption peak attributed to the release from pores (i.e. cavities and bubbles) was suppressed in the plastically deformed samples for the low-temperature exposures, but became dominant for exposures above 700Â K. The observed strong modulation of the deuterium storage in “shallow” and “deep” traps, as well as the reduction of the integral retention above 700Â K, suggest that the dislocation network changes its role from “trapping sites” to “diffusion channels” above a certain temperature. The major experimental observations of the present work are in line with recent computational assessment based on atomistic and mean field theory calculations available in literature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 479, October 2016, Pages 307-315
Journal: Journal of Nuclear Materials - Volume 479, October 2016, Pages 307-315
نویسندگان
A. Bakaeva, D. Terentyev, G. De Temmerman, K. Lambrinou, T.W. Morgan, A. Dubinko, P. Grigorev, K. Verbeken, J.M. Noterdaeme,