The oxidation behavior of MoSi2-CrSi2-Si/SiC coating for C/C composites in H2O-O2-Ar atmosphere: Experiment and first-principle investigation

Liping Guo; Qiangang Fu; Jia Sun; Chunyu Cheng

doi:10.1016/j.ceramint.2017.04.020

The oxidation behavior of MoSi₂-CrSi₂-Si/SiC coating for C/C composites in H₂O-O₂-Ar atmosphere: Experiment and first-principle investigation

Liping Guo
, Qiangang Fu
, Jia Sun
, Chunyu Cheng

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

21 Scopus citations

Abstract

The MoSi₂-CrSi₂-Si/SiC multi-component coating was prepared by two-step pack cementation on carbon/carbon composites. To investigate the effect of water vapor on the anti-oxidation of the coated samples, two kinds of atmosphere (50%H₂O-50%O₂, 50%O₂-50%Ar) were designed for comparison with a total pressure of 1 atm at 1773 K. The results showed that, after being tested for 10 h, the weight loss of the coated samples in O₂+Ar and H₂O+O₂ were 0.243% and 0.436% respectively. The reasons for different weight losses can be attributed to the water vapor, which could degrade the protective ability of the glass layer formed by SiO₂ and Cr₂O₃ and thereby accelerate the oxidation of MoSi₂ and CrSi₂. Based on the Mulliken analysis calculated by the first principle, the corresponding water vapor corrosion resistance of the prepared coating was in the following order: SiC>MoSi₂>CrSi₂, which was consistent with the experimental phenomenon.

Original language	English
Pages (from-to)	8858-8865
Number of pages	8
Journal	Ceramics International
Volume	43
Issue number	12
DOIs	https://doi.org/10.1016/j.ceramint.2017.04.020
State	Published - 15 Aug 2017

Keywords

Ceramic matrix composites
High temperature corrosion
Weight loss

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10.1016/j.ceramint.2017.04.020

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@article{b4f29437d9f949a8bc652f7201a1eb5b,

title = "The oxidation behavior of MoSi2-CrSi2-Si/SiC coating for C/C composites in H2O-O2-Ar atmosphere: Experiment and first-principle investigation",

abstract = "The MoSi2-CrSi2-Si/SiC multi-component coating was prepared by two-step pack cementation on carbon/carbon composites. To investigate the effect of water vapor on the anti-oxidation of the coated samples, two kinds of atmosphere (50\%H2O-50\%O2, 50\%O2-50\%Ar) were designed for comparison with a total pressure of 1 atm at 1773 K. The results showed that, after being tested for 10 h, the weight loss of the coated samples in O2+Ar and H2O+O2 were 0.243\% and 0.436\% respectively. The reasons for different weight losses can be attributed to the water vapor, which could degrade the protective ability of the glass layer formed by SiO2 and Cr2O3 and thereby accelerate the oxidation of MoSi2 and CrSi2. Based on the Mulliken analysis calculated by the first principle, the corresponding water vapor corrosion resistance of the prepared coating was in the following order: SiC>MoSi2>CrSi2, which was consistent with the experimental phenomenon.",

keywords = "Ceramic matrix composites, High temperature corrosion, Weight loss",

author = "Liping Guo and Qiangang Fu and Jia Sun and Chunyu Cheng",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd and Techna Group S.r.l.",

year = "2017",

month = aug,

day = "15",

doi = "10.1016/j.ceramint.2017.04.020",

language = "英语",

volume = "43",

pages = "8858--8865",

journal = "Ceramics International",

issn = "0272-8842",

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number = "12",

}

TY - JOUR

T1 - The oxidation behavior of MoSi2-CrSi2-Si/SiC coating for C/C composites in H2O-O2-Ar atmosphere

T2 - Experiment and first-principle investigation

AU - Guo, Liping

AU - Fu, Qiangang

AU - Sun, Jia

AU - Cheng, Chunyu

PY - 2017/8/15

Y1 - 2017/8/15

N2 - The MoSi2-CrSi2-Si/SiC multi-component coating was prepared by two-step pack cementation on carbon/carbon composites. To investigate the effect of water vapor on the anti-oxidation of the coated samples, two kinds of atmosphere (50%H2O-50%O2, 50%O2-50%Ar) were designed for comparison with a total pressure of 1 atm at 1773 K. The results showed that, after being tested for 10 h, the weight loss of the coated samples in O2+Ar and H2O+O2 were 0.243% and 0.436% respectively. The reasons for different weight losses can be attributed to the water vapor, which could degrade the protective ability of the glass layer formed by SiO2 and Cr2O3 and thereby accelerate the oxidation of MoSi2 and CrSi2. Based on the Mulliken analysis calculated by the first principle, the corresponding water vapor corrosion resistance of the prepared coating was in the following order: SiC>MoSi2>CrSi2, which was consistent with the experimental phenomenon.

AB - The MoSi2-CrSi2-Si/SiC multi-component coating was prepared by two-step pack cementation on carbon/carbon composites. To investigate the effect of water vapor on the anti-oxidation of the coated samples, two kinds of atmosphere (50%H2O-50%O2, 50%O2-50%Ar) were designed for comparison with a total pressure of 1 atm at 1773 K. The results showed that, after being tested for 10 h, the weight loss of the coated samples in O2+Ar and H2O+O2 were 0.243% and 0.436% respectively. The reasons for different weight losses can be attributed to the water vapor, which could degrade the protective ability of the glass layer formed by SiO2 and Cr2O3 and thereby accelerate the oxidation of MoSi2 and CrSi2. Based on the Mulliken analysis calculated by the first principle, the corresponding water vapor corrosion resistance of the prepared coating was in the following order: SiC>MoSi2>CrSi2, which was consistent with the experimental phenomenon.

KW - Ceramic matrix composites

KW - High temperature corrosion

KW - Weight loss

UR - https://www.scopus.com/pages/publications/85018971348

U2 - 10.1016/j.ceramint.2017.04.020

DO - 10.1016/j.ceramint.2017.04.020

M3 - 文章

AN - SCOPUS:85018971348

SN - 0272-8842

VL - 43

SP - 8858

EP - 8865

JO - Ceramics International

JF - Ceramics International

IS - 12

ER -

The oxidation behavior of MoSi₂-CrSi₂-Si/SiC coating for C/C composites in H₂O-O₂-Ar atmosphere: Experiment and first-principle investigation

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