期刊
MATERIALS CHARACTERIZATION
卷 107, 期 -, 页码 309-316出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2015.07.025
关键词
Zr alloy; Helium bubble; TEM; In situ investigation; Annealing
类别
资金
- Key Laboratory of Neutron Physics of China Academy of Engineering Physics [2012AB02]
- Fundamental Research Funds for the Central Universities of Ministry of Education of China [ZYGX2012YB017]
- National Natural Science Foundation of China [91126001]
- National Science Foundation [DMR-9871177]
- Helios FIB under University of Michigan College of Engineering
The formation of helium bubbles is considered to be detrimental to the mechanical performance of the nuclear materials. The growth behaviors of helium bubbles in a helium ion implanted Zr-Sn-Nb-Fe-Cr alloy with respect to the helium fluence and subsequently annealing procedure were investigated by in-situ transmission electron microscopy. In the as-implanted sample, the measured size distributions of the helium bubbles are consistent with the simulated helium concentrations. Moreover, the mean size of the helium bubbles increases with the increase of the irradiation temperatures and the helium fluence. The in-situ heating study performed in a transmission electron microscope indicates that the mean size of the helium bubbles increase slowly below 923 K and dramatically above 923 K. The coarsening mechanism of the helium bubbles in the alloy is suggested based on the study. (C) 2015 Elsevier Inc. All rights reserved.
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