Multilayer ZrO 2 /Cr Coating for Protection of E110 Zirconium Alloy from High-Temperature Oxidation

D. V. Sidelev; Сиделев Д. В.; S. E. Ruchkin; Ручкин С. Е.; M. S. Syrtanov; Сыртанов М. С.; A. V. Pirozhkov; Пирожков А. В.; P. N. Maximov; Максимов П. Н.

doi:10.31857/S1028096023090108

Multilayer ZrO₂/Cr Coating for Protection of E110 Zirconium Alloy from High-Temperature Oxidation

Authors: Sidelev D.V.¹, Ruchkin S.E.¹, Syrtanov M.S.¹, Pirozhkov A.V.¹, Maximov P.N.¹
Affiliations:
1. National Research Tomsk Polytechnic University
Issue: No 9 (2023)
Pages: 25-29
Section: Articles
URL: https://journals.rcsi.science/1028-0960/article/view/137808
DOI: https://doi.org/10.31857/S1028096023090108
EDN: https://elibrary.ru/ZMECNV
ID: 137808

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Abstract
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Abstract

Cr coatings with multilayer barrier composed of alternating ZrO₂ and Cr layers with an individual thickness of each layer of 50 and 250 nm were prepared onto substrates made from zirconium E110 alloy using magnetron sputtering. The protective multilayer ZrO₂/Cr coating on zirconium E110 alloy were studied under high-temperature oxidation in air at a temperature of 1100°C for 10, 20, 30 and 40 min. The lower rate of change in weight gain of samples having ZrO₂/Cr barriers was found in comparison with samples coated by chromium during long-term oxidation tests. Diffraction measurements of samples were done under linear heating (50°С/min) in a range of temperature of 25–1250°С and next isothermal treatment for 20 min under high vacuum (10^–3 Pa) using the in situ diffraction. It was found that the mutual diffusion of Cr-Zr at the interface between the protective coating having the multilayer barrier composed of alternating ZrO₂ and Cr layers and zirconium alloy can be slowed down. This results in the retention of high content of α-Cr phase in the coating and, as a result, in the increase of the duration of the protective state of E110 alloy under the high-temperature oxidation in air.

Keywords

high-temperature oxidation, zirconium alloys, magnetron sputtering, multilayer coatings, ZrO₂ and Cr coatings, X-ray diffraction, in situ diffraction, synchrotron radiation.

References

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