کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7987322 | 1515275 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Detection of phase separation of neutron-irradiated Fe-Cr binary alloys using positron annihilation spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Phase separation in Fe-Cr binary alloys irradiated with neutrons at 473â¯K and 573â¯K was investigated using positron annihilation spectroscopy. Using positron annihilation coincidence Doppler broadening (CDB) measurements, the phase separation progress was observed in neutron-irradiated samples at 473â¯K and 573â¯K. Vacancy clusters were detected in Fe-xCr (xâ¯=â¯0, 9, 15, 30, 45, 50, and 100) during 473â¯K irradiation using positron annihilation lifetime measurements, but were not detected in Fe-xCr (xâ¯=â¯70, 85, and 91) irradiated at 473â¯K or in any samples irradiated at 573â¯K. Additionally, in Fe-xCr (xâ¯=â¯70, 85, and 91) irradiated at 473â¯K, all positrons were annihilated with core Fe electrons as determined from CDB ratio curves. Thus, vacancy clusters were not detected in the Fe-rich phase. There was a possibility that vacancy clusters are formed in the Cr-rich phase, but they were not detected by the PAS. Therefore, another method is necessary to investigate this further. Vickers hardness tests indicated that neutron-irradiated samples were harder than unirradiated samples. The contribution of phase separation and neutron-irradiation defects to increased hardness was dependent on the irradiation conditions including temperature and dose.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Materials and Energy - Volume 15, May 2018, Pages 175-179
Journal: Nuclear Materials and Energy - Volume 15, May 2018, Pages 175-179
نویسندگان
Y. Noshita, K. Sato, H. Yamashita, R. Kasada, Q. Xu, M. Hatakeyama, S. Sunada,