Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8039126 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2018 | 9 Pages |
Abstract
Silicon carbide-nanostructured ferritic alloy (SiC-NFA) materials are expected to have the beneficial properties of each component for advanced nuclear claddings. Fabrication of pure NFA (0â¯vol% SiC-100â¯vol% NFA) and SiC-NFAs (2.5â¯vol% SiC-97.5â¯vol% NFA, 5â¯vol% SiC-95â¯vol% NFA) has been reported in our previous work. This paper is focused on the study of radiation damage in these materials under 5â¯MeV Fe++ ion irradiation with a dose up to â¼264â¯dpa. It is found that the material surfaces are damaged to high roughness with irregularly shaped ripples, which can be explained by the Bradley-Harper (B-H) model. The NFA matrix shows ion irradiation induced defect clusters and small dislocation loops, while the crystalline structure is maintained. Reaction products of Fe3Si and Cr23C6 are identified in the SiC-NFA materials, with the former having a partially crystalline structure but the latter having a fully amorphous structure upon irradiation. The different radiation damage behaviors of NFA, Fe3Si, and Cr23C6 are explained using the defect reaction rate theory.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Kaijie Ning, Xianming Bai, Kathy Lu,