Influence of Cr content on microstructure and oxidation behavior of modified Mo-Si-B composite coatings

Beibei Xu; Xiping Guo; Yanqiang Qiao

doi:10.1016/j.corsci.2025.113011

Influence of Cr content on microstructure and oxidation behavior of modified Mo-Si-B composite coatings

Beibei Xu, Xiping Guo, Yanqiang Qiao

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

Abstract

Cr-modified Mo-Si-B composite coatings were prepared on Nb-Si based alloy by slurry sintering. The effects of Cr contents (0, 5, 10 and 15 wt%) on the microstructure and oxidation behavior of Mo-Si-B coatings were revealed. The addition of high Cr content improved compactness, and the coating evolved from a bilayer to a trilayer. The 10Cr coating exhibited the best oxidation resistance for oxidation at 1380 ℃ for 100 h, which was mainly because the formed oxide scale embedded with CrNbO₄ and TiNbO₄ had lower stresses, lower oxygen permeability and better integrity, thus effectively inhibiting the inward diffusion of oxygen.

Original language	English
Article number	113011
Journal	Corrosion Science
Volume	253
DOIs	https://doi.org/10.1016/j.corsci.2025.113011
State	Published - 15 Aug 2025

Keywords

Compactness
Cr modification
Diffusion
Mo-Si-B composite coating
Oxidation resistance

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10.1016/j.corsci.2025.113011

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title = "Influence of Cr content on microstructure and oxidation behavior of modified Mo-Si-B composite coatings",

abstract = "Cr-modified Mo-Si-B composite coatings were prepared on Nb-Si based alloy by slurry sintering. The effects of Cr contents (0, 5, 10 and 15 wt%) on the microstructure and oxidation behavior of Mo-Si-B coatings were revealed. The addition of high Cr content improved compactness, and the coating evolved from a bilayer to a trilayer. The 10Cr coating exhibited the best oxidation resistance for oxidation at 1380 ℃ for 100 h, which was mainly because the formed oxide scale embedded with CrNbO4 and TiNbO4 had lower stresses, lower oxygen permeability and better integrity, thus effectively inhibiting the inward diffusion of oxygen.",

keywords = "Compactness, Cr modification, Diffusion, Mo-Si-B composite coating, Oxidation resistance",

author = "Beibei Xu and Xiping Guo and Yanqiang Qiao",

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year = "2025",

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doi = "10.1016/j.corsci.2025.113011",

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T1 - Influence of Cr content on microstructure and oxidation behavior of modified Mo-Si-B composite coatings

AU - Xu, Beibei

AU - Guo, Xiping

AU - Qiao, Yanqiang

PY - 2025/8/15

Y1 - 2025/8/15

N2 - Cr-modified Mo-Si-B composite coatings were prepared on Nb-Si based alloy by slurry sintering. The effects of Cr contents (0, 5, 10 and 15 wt%) on the microstructure and oxidation behavior of Mo-Si-B coatings were revealed. The addition of high Cr content improved compactness, and the coating evolved from a bilayer to a trilayer. The 10Cr coating exhibited the best oxidation resistance for oxidation at 1380 ℃ for 100 h, which was mainly because the formed oxide scale embedded with CrNbO4 and TiNbO4 had lower stresses, lower oxygen permeability and better integrity, thus effectively inhibiting the inward diffusion of oxygen.

AB - Cr-modified Mo-Si-B composite coatings were prepared on Nb-Si based alloy by slurry sintering. The effects of Cr contents (0, 5, 10 and 15 wt%) on the microstructure and oxidation behavior of Mo-Si-B coatings were revealed. The addition of high Cr content improved compactness, and the coating evolved from a bilayer to a trilayer. The 10Cr coating exhibited the best oxidation resistance for oxidation at 1380 ℃ for 100 h, which was mainly because the formed oxide scale embedded with CrNbO4 and TiNbO4 had lower stresses, lower oxygen permeability and better integrity, thus effectively inhibiting the inward diffusion of oxygen.

KW - Compactness

KW - Cr modification

KW - Diffusion

KW - Mo-Si-B composite coating

KW - Oxidation resistance

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U2 - 10.1016/j.corsci.2025.113011

DO - 10.1016/j.corsci.2025.113011

M3 - 文章

AN - SCOPUS:105004215988

SN - 0010-938X

VL - 253

JO - Corrosion Science

JF - Corrosion Science

M1 - 113011

ER -

Influence of Cr content on microstructure and oxidation behavior of modified Mo-Si-B composite coatings

Abstract

Keywords

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