Molybdenum Texture Effect on High Temperature Oxidation Resistance of Cr/Mo-Coated Zr–1Nb Alloy

A. V. Abdulmenova; Абдульменова А. В.; M. S. Syrtanov; Сыртанов М. С.; E. B. Kashkarov; Кашкаров Е. Б.; D. V. Sidelev; Сиделев Д. В.

doi:10.31857/S102809602306002X

Molybdenum Texture Effect on High Temperature Oxidation Resistance of Cr/Mo-Coated Zr–1Nb Alloy

Authors: Abdulmenova A.V.¹, Syrtanov M.S.¹, Kashkarov E.B.¹, Sidelev D.V.¹
Affiliations:
1. National Research Tomsk Polytechnic University
Issue: No 6 (2023)
Pages: 39-44
Section: Articles
URL: https://archivog.com/1028-0960/article/view/664549
DOI: https://doi.org/10.31857/S102809602306002X
EDN: https://elibrary.ru/DHMMDZ
ID: 664549

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Abstract
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Abstract

The effect of the crystal structure of the Mo sublayer on the resistance of the Zr–1Nb zirconium alloy with a Cr/Mo coating to high-temperature oxidation in air were studied. Three types of coating were deposited by magnetron sputtering: a single-layer Cr coating with a thickness of 8 μm, bilayer coatings with a Mo sublayer (3 μm) of various textures and an outer protective Cr layer (8 μm). Different textures of molybdenum layers were formed by changing the configuration of the magnetron sputtering system. Coated samples were oxidized in an atmospheric furnace at 1100°C for 15, 30, 45 and 60 min. The results of X-ray diffraction and scanning electron microscopy showed that applying Mo sublayer limited the Cr–Zr interdiffusion. Diffusion of Mo leads to the formation of interdiffusion layers Cr–Mo and Mo–Zr. Faster diffusion is observed at the Cr–Mo interface. The thickness of the residual Cr layer in bilayer coatings is greater than in a single-layer one under similar oxidation conditions.

Keywords

zirconium alloy, magnetron sputtering, protective coating, barrier sublayer, high-temperature oxidation, chromium, molybdenum, X-ray diffraction.

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