کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8943230 1645141 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-temperature damage evolution in 10 keV He+ irradiated W and W-5Re
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
High-temperature damage evolution in 10 keV He+ irradiated W and W-5Re
چکیده انگلیسی
High-temperature damage evolution in pure W and W-5Re has been studied by combining transmission electron microscopy and in-situ irradiations with 10 keV He+ ions. The irradiations covered a temperature range of Tirr = 773-1473 K and a fluence range of (4.5-15) × 1019 He+/m2. In pure W, detailed characterizations have shown that damage evolution is highly dependent upon the foil thickness. Regions of thickness < 100 nm featured helium bubbles almost exclusively. With increasing Tirr from 773 K to 1473 K, a pronounced bubble growth and an increased degree of bubble ordering were observed. In thicker regions (≳100 nm), 1/2〈111〉 dislocation loops and line entanglements were found up to 1473 K, and were often seen to be decorated with helium bubbles. In W-5Re, areas of different foil thickness exhibited only small differences in damage evolution. The densities of bubbles were comparable to those seen in pure W at all temperatures, while the average size of bubbles was found to be ~10-40% higher. The damage microstructure transformed from a mixture of dislocation loops and bubbles at 773 K to dislocation line entanglements decorated with bubbles at 1473 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 145, November 2018, Pages 77-86
نویسندگان
, , , , , , ,