Enhancing the irradiation resistance of Cr coating via periodic insertion of nanochannel CrAlSiN layers that act as elastic unsaturated "sponges"

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00383319" target="_blank" >RIV/68407700:21230/25:00383319 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.corsci.2025.112742" target="_blank" >https://doi.org/10.1016/j.corsci.2025.112742</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.corsci.2025.112742" target="_blank" >10.1016/j.corsci.2025.112742</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhancing the irradiation resistance of Cr coating via periodic insertion of nanochannel CrAlSiN layers that act as elastic unsaturated "sponges"

Popis výsledku v původním jazyce

Cr-based coatings, as protective coatings of Zr-alloy fuel claddings, inevitably suffer from irradiation damage under actual nuclear operating conditions. Here, Cr/CrAlSiN multilayer coatings were deposited on Zircaloy substrates by magnetron sputtering, followed by the evaluation of irradiation resistance using Fe ions. The insertion of nanochannel-CrAlSiN layers refined the columns/grains in Cr layers and increased the interface density, contributing to the greatly enhanced irradiation tolerance and mechanical properties. A low average swelling rate of Cr layers was estimated to be similar to 0.015 %/dpa after the irradiation of Fe ions at 400 degrees C. Moreover, the coating became compacted with strengthening columnar boundaries after low-dose irradiation (similar to 0.8 dpa). Both nanoindentation and micropillar compression test showed the transformation of the deformation mechanism for the multilayer coating, as the irradiated samples relieved stress mainly depending on the plastic deformation under loading, while many cracks formed in the as-deposited ones. Furthermore, in 1200 degrees C steam, a significantly thinner and denser oxide scale formed on the irradiated Cr/CrAlSiN coating, indicative of improved oxidation resistance. The mechanism of radiation-decelerated oxidation was briefly discussed.

Název v anglickém jazyce

Enhancing the irradiation resistance of Cr coating via periodic insertion of nanochannel CrAlSiN layers that act as elastic unsaturated "sponges"

Popis výsledku anglicky

Cr-based coatings, as protective coatings of Zr-alloy fuel claddings, inevitably suffer from irradiation damage under actual nuclear operating conditions. Here, Cr/CrAlSiN multilayer coatings were deposited on Zircaloy substrates by magnetron sputtering, followed by the evaluation of irradiation resistance using Fe ions. The insertion of nanochannel-CrAlSiN layers refined the columns/grains in Cr layers and increased the interface density, contributing to the greatly enhanced irradiation tolerance and mechanical properties. A low average swelling rate of Cr layers was estimated to be similar to 0.015 %/dpa after the irradiation of Fe ions at 400 degrees C. Moreover, the coating became compacted with strengthening columnar boundaries after low-dose irradiation (similar to 0.8 dpa). Both nanoindentation and micropillar compression test showed the transformation of the deformation mechanism for the multilayer coating, as the irradiated samples relieved stress mainly depending on the plastic deformation under loading, while many cracks formed in the as-deposited ones. Furthermore, in 1200 degrees C steam, a significantly thinner and denser oxide scale formed on the irradiated Cr/CrAlSiN coating, indicative of improved oxidation resistance. The mechanism of radiation-decelerated oxidation was briefly discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/EH22_008%2F0004590" target="_blank" >EH22_008/0004590: Robotika a pokročilá průmyslová výroba</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Název periodika

Corrosion Science

ISSN

0010-938X

e-ISSN

1879-0496

Svazek periodika

246

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

13

Strana od-do

—

Kód UT WoS článku

001425143100001

EID výsledku v databázi Scopus

2-s2.0-85216898445