Enhancing the radiation- and oxidation-resistance of Cr-based coatings via structure regulation and composition optimization
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F26%3A0200646" target="_blank" >RIV/00216305:26620/26:0200646 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21230/25:00377944
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S1005030224009009?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S1005030224009009?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jmst.2024.08.051" target="_blank" >10.1016/j.jmst.2024.08.051</a>
Alternative languages
Result language
angličtina
Original language name
Enhancing the radiation- and oxidation-resistance of Cr-based coatings via structure regulation and composition optimization
Original language description
Cr coatings, as protective coatings of Zr-alloy fuel claddings, inevitably suffer from irradiation damage before they would possibly run into the accident condition. This study evaluates the radiation and oxidation tolerance of three Cr-based coatings with different microstructures (Cr, CrAlSi, and CrAlSiN) through He2 + ion irradiation and 1200 degrees C steam oxidation. The Cr and CrAlSi coatings experienced significant structural degradation, characterized by He bubble aggregation and amplified Kirkendall effects at elevated temperatures. In contrast, the irradiated CrAlSiN coating maintained structural integrity without measurable irradiation hardening. Following annealing at 800 degrees C for 30 min, approximately 40 % of injected He atoms were released, indicating a "self-healing" mechanism. The mechanism is attributed to uniformly distributed, low-density channels that act as sinks and release paths for irradiation-induced defects. Density functional theory simulations suggest that N atoms promote significant rearrangement of ions surrounding the free volume, inhibiting the formation of sites capable of trapping He atoms. Moreover, the CrAlSiN coating exhibited superior oxidation resistance compared to the Cr and CrAlSi coatings, even under high-temperature steam conditions. Notably, the irradiated CrAlSiN sample displayed a significantly thinner oxide scale compared to the pristine one (almost half), owing to a more protective oxide scale and rapid outward diffusion of Cr, Al, and Si through nanochannel veins. These findings illuminate the effects of structure and composition on irradiation and oxidation behavior in Cr-based coatings, offering insights for developing new-generation accident-tolerance fuel coatings for Zr-alloy claddings. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/EH22_008%2F0004590" target="_blank" >EH22_008/0004590: Robotics and advanced industrial production</a><br>
Continuities
O - Projekt operacniho programu
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Materials Science & Technology
ISSN
1005-0302
e-ISSN
1941-1162
Volume of the periodical
218
Issue of the periodical within the volume
1
Country of publishing house
CN - CHINA
Number of pages
17
Pages from-to
153-169
UT code for WoS article
001342533600001
EID of the result in the Scopus database
—