SiC-Si coating with micro-pores to protect carbon/carbon composites against oxidation

Xiaofei Zhu; Yulei Zhang; Yangyang Su; Yanqin Fu; Pei Zhang

doi:10.1016/j.jeurceramsoc.2020.08.045

SiC-Si coating with micro-pores to protect carbon/carbon composites against oxidation

Xiaofei Zhu
, Yulei Zhang
, Yangyang Su
, Yanqin Fu
, Pei Zhang

Northwestern Polytechnical University Xian

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

64 Scopus citations

Abstract

To improve the oxidation resistance of carbon/carbon (C/C) composites at high temperatures, a SiC-Si coating with micro-pores was prepared by slurry and heat-treatment on the surface of C/C composites with SiC-Si inner coating acquired by pack cementation (PC). The microstructure, phase composition, element distribution, and anti-oxidation properties of the dual-layer SiC-Si coating were investigated. The results show that a SiO₂-SiC inlay structure was formed during the oxidation process, due to a large amount of SiO₂ rapidly generated by the oxidation of SiC particles in the porous coating. The coating with this structure could inhibit the cracking of SiO₂ glass and had a good resistance to oxygen diffusion. Moreover, the crack propagation was blocked by the remaining micro-pores of the coating. The coating could protect C/C composites against oxidation for 846 h only with the mass loss of 0.16 % at 1773 K in air.

Original language	English
Pages (from-to)	114-120
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	41
Issue number	1
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2020.08.045
State	Published - Jan 2021
Externally published	Yes

Keywords

Carbon/carbon composites
Dual-layer SiC-Si coating
Micro-pores
Oxidation resistance
SiO-SiC inlay structure

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10.1016/j.jeurceramsoc.2020.08.045

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@article{6453098016584d6a988e0865b09ef3f6,

title = "SiC-Si coating with micro-pores to protect carbon/carbon composites against oxidation",

abstract = "To improve the oxidation resistance of carbon/carbon (C/C) composites at high temperatures, a SiC-Si coating with micro-pores was prepared by slurry and heat-treatment on the surface of C/C composites with SiC-Si inner coating acquired by pack cementation (PC). The microstructure, phase composition, element distribution, and anti-oxidation properties of the dual-layer SiC-Si coating were investigated. The results show that a SiO2-SiC inlay structure was formed during the oxidation process, due to a large amount of SiO2 rapidly generated by the oxidation of SiC particles in the porous coating. The coating with this structure could inhibit the cracking of SiO2 glass and had a good resistance to oxygen diffusion. Moreover, the crack propagation was blocked by the remaining micro-pores of the coating. The coating could protect C/C composites against oxidation for 846 h only with the mass loss of 0.16 \% at 1773 K in air.",

keywords = "Carbon/carbon composites, Dual-layer SiC-Si coating, Micro-pores, Oxidation resistance, SiO-SiC inlay structure",

author = "Xiaofei Zhu and Yulei Zhang and Yangyang Su and Yanqin Fu and Pei Zhang",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2021",

month = jan,

doi = "10.1016/j.jeurceramsoc.2020.08.045",

language = "英语",

volume = "41",

pages = "114--120",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

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TY - JOUR

T1 - SiC-Si coating with micro-pores to protect carbon/carbon composites against oxidation

AU - Zhu, Xiaofei

AU - Zhang, Yulei

AU - Su, Yangyang

AU - Fu, Yanqin

AU - Zhang, Pei

PY - 2021/1

Y1 - 2021/1

N2 - To improve the oxidation resistance of carbon/carbon (C/C) composites at high temperatures, a SiC-Si coating with micro-pores was prepared by slurry and heat-treatment on the surface of C/C composites with SiC-Si inner coating acquired by pack cementation (PC). The microstructure, phase composition, element distribution, and anti-oxidation properties of the dual-layer SiC-Si coating were investigated. The results show that a SiO2-SiC inlay structure was formed during the oxidation process, due to a large amount of SiO2 rapidly generated by the oxidation of SiC particles in the porous coating. The coating with this structure could inhibit the cracking of SiO2 glass and had a good resistance to oxygen diffusion. Moreover, the crack propagation was blocked by the remaining micro-pores of the coating. The coating could protect C/C composites against oxidation for 846 h only with the mass loss of 0.16 % at 1773 K in air.

AB - To improve the oxidation resistance of carbon/carbon (C/C) composites at high temperatures, a SiC-Si coating with micro-pores was prepared by slurry and heat-treatment on the surface of C/C composites with SiC-Si inner coating acquired by pack cementation (PC). The microstructure, phase composition, element distribution, and anti-oxidation properties of the dual-layer SiC-Si coating were investigated. The results show that a SiO2-SiC inlay structure was formed during the oxidation process, due to a large amount of SiO2 rapidly generated by the oxidation of SiC particles in the porous coating. The coating with this structure could inhibit the cracking of SiO2 glass and had a good resistance to oxygen diffusion. Moreover, the crack propagation was blocked by the remaining micro-pores of the coating. The coating could protect C/C composites against oxidation for 846 h only with the mass loss of 0.16 % at 1773 K in air.

KW - Carbon/carbon composites

KW - Dual-layer SiC-Si coating

KW - Micro-pores

KW - Oxidation resistance

KW - SiO-SiC inlay structure

UR - https://www.scopus.com/pages/publications/85090010359

U2 - 10.1016/j.jeurceramsoc.2020.08.045

DO - 10.1016/j.jeurceramsoc.2020.08.045

M3 - 文章

AN - SCOPUS:85090010359

SN - 0955-2219

VL - 41

SP - 114

EP - 120

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 1

ER -

SiC-Si coating with micro-pores to protect carbon/carbon composites against oxidation

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Keywords

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