Oxidation behavior of SiC-HfB2-Si coating on C/C composites prepared by slurry dipping combined with gaseous Si infiltration

Pei Zhang; Qian gang Fu; Dou Hu; Chun yu Cheng; Xiao fei Zhu

doi:10.1016/j.surfcoat.2020.125335

Oxidation behavior of SiC-HfB₂-Si coating on C/C composites prepared by slurry dipping combined with gaseous Si infiltration

Pei Zhang, Qian gang Fu, Dou Hu, Chun yu Cheng, Xiao fei Zhu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

47 Scopus citations

Abstract

An effective monolayer SiC-HfB₂-Si coating for long-time oxidation protection of C/C composites was designed and prepared by a combined technique of slurry dipping and gaseous Si infiltration (SD + GSI). This coating is dense and adheres well with the C/C substrate, which is ascribed to the formed zigzagged SiC transition layer. After oxidation at 1773 K in static air for >538 h, the mass loss of SiC-HfB₂-Si coated samples is only 0.69%. By thermodynamic calculation, the oxidation process of SiC-HfB₂-Si coated samples is mainly controlled by oxygen diffusion, and the stable oxidation products are HfO₂ + B₂O₃ + SiO₂ + CO. The excellent oxidation protective ability is mostly attributed to the formation of a composite Hf-Si-O glass layer on the coating surface to heal cracks and pores.

Original language	English
Article number	125335
Journal	Surface and Coatings Technology
Volume	385
DOIs	https://doi.org/10.1016/j.surfcoat.2020.125335
State	Published - 15 Mar 2020

Keywords

C/C composites
Gaseous Si infiltration
Oxidation resistance
SiC-HfB-Si coating
Slurry dipping

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10.1016/j.surfcoat.2020.125335

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@article{544b2f2ac76f4f8bbd20b2b563bf8ff2,

title = "Oxidation behavior of SiC-HfB2-Si coating on C/C composites prepared by slurry dipping combined with gaseous Si infiltration",

abstract = "An effective monolayer SiC-HfB2-Si coating for long-time oxidation protection of C/C composites was designed and prepared by a combined technique of slurry dipping and gaseous Si infiltration (SD + GSI). This coating is dense and adheres well with the C/C substrate, which is ascribed to the formed zigzagged SiC transition layer. After oxidation at 1773 K in static air for >538 h, the mass loss of SiC-HfB2-Si coated samples is only 0.69%. By thermodynamic calculation, the oxidation process of SiC-HfB2-Si coated samples is mainly controlled by oxygen diffusion, and the stable oxidation products are HfO2 + B2O3 + SiO2 + CO. The excellent oxidation protective ability is mostly attributed to the formation of a composite Hf-Si-O glass layer on the coating surface to heal cracks and pores.",

keywords = "C/C composites, Gaseous Si infiltration, Oxidation resistance, SiC-HfB-Si coating, Slurry dipping",

author = "Pei Zhang and Fu, {Qian gang} and Dou Hu and Cheng, {Chun yu} and Zhu, {Xiao fei}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = mar,

day = "15",

doi = "10.1016/j.surfcoat.2020.125335",

language = "英语",

volume = "385",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

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TY - JOUR

T1 - Oxidation behavior of SiC-HfB2-Si coating on C/C composites prepared by slurry dipping combined with gaseous Si infiltration

AU - Zhang, Pei

AU - Fu, Qian gang

AU - Hu, Dou

AU - Cheng, Chun yu

AU - Zhu, Xiao fei

PY - 2020/3/15

Y1 - 2020/3/15

N2 - An effective monolayer SiC-HfB2-Si coating for long-time oxidation protection of C/C composites was designed and prepared by a combined technique of slurry dipping and gaseous Si infiltration (SD + GSI). This coating is dense and adheres well with the C/C substrate, which is ascribed to the formed zigzagged SiC transition layer. After oxidation at 1773 K in static air for >538 h, the mass loss of SiC-HfB2-Si coated samples is only 0.69%. By thermodynamic calculation, the oxidation process of SiC-HfB2-Si coated samples is mainly controlled by oxygen diffusion, and the stable oxidation products are HfO2 + B2O3 + SiO2 + CO. The excellent oxidation protective ability is mostly attributed to the formation of a composite Hf-Si-O glass layer on the coating surface to heal cracks and pores.

AB - An effective monolayer SiC-HfB2-Si coating for long-time oxidation protection of C/C composites was designed and prepared by a combined technique of slurry dipping and gaseous Si infiltration (SD + GSI). This coating is dense and adheres well with the C/C substrate, which is ascribed to the formed zigzagged SiC transition layer. After oxidation at 1773 K in static air for >538 h, the mass loss of SiC-HfB2-Si coated samples is only 0.69%. By thermodynamic calculation, the oxidation process of SiC-HfB2-Si coated samples is mainly controlled by oxygen diffusion, and the stable oxidation products are HfO2 + B2O3 + SiO2 + CO. The excellent oxidation protective ability is mostly attributed to the formation of a composite Hf-Si-O glass layer on the coating surface to heal cracks and pores.

KW - C/C composites

KW - Gaseous Si infiltration

KW - Oxidation resistance

KW - SiC-HfB-Si coating

KW - Slurry dipping

UR - http://www.scopus.com/inward/record.url?scp=85077759119&partnerID=8YFLogxK

U2 - 10.1016/j.surfcoat.2020.125335

DO - 10.1016/j.surfcoat.2020.125335

M3 - 文章

AN - SCOPUS:85077759119

SN - 0257-8972

VL - 385

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

M1 - 125335

ER -

Oxidation behavior of SiC-HfB₂-Si coating on C/C composites prepared by slurry dipping combined with gaseous Si infiltration

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Keywords

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