Liquid-phase-rich compensatory layer enabled self-healing in Si-SiO2/SiC-SiCw-Si bilayer anti-oxidation coating

Yaoying Zeng; Running Wang; Jiaping Zhang; Jiaqi Hou; Chenglong Tan; Hejun Li

doi:10.1016/j.surfcoat.2025.132980

Liquid-phase-rich compensatory layer enabled self-healing in Si-SiO₂/SiC-SiCw-Si bilayer anti-oxidation coating

Yaoying Zeng
, Running Wang
, Jiaping Zhang
, Jiaqi Hou
, Chenglong Tan
, Hejun Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

1 Scopus citations

Abstract

A Si-SiO₂/SiC-SiCw-Si bilayer anti-oxidation coating was prepared on C/C composites by the slurry method, chemical vapor deposition joint gaseous silicon infiltration. The specimen got a mass loss of 1.69 % after 20 thermal cycles between 1773 K and room temperature, and a mass gain of 1.53 % after 217 h of oxidation at 1773 K. The high fluidity of molten Si facilitated the outer layer's ability to replenish the inner layer, thereby healing defects within the coating. Combined with the viscous flow property of SiO₂ during oxidation, the outer layer achieved a dynamic sealing. The coating integrated a liquid-phase-rich compensatory outer layer with a SiC whisker-reinforced crack-resistant inner layer, which worked synergistically to provide effective oxidation protection.

Original language	English
Article number	132980
Journal	Surface and Coatings Technology
Volume	519
DOIs	https://doi.org/10.1016/j.surfcoat.2025.132980
State	Published - 1 Jan 2026

Keywords

Anti-oxidation coating
C/C composites
Si-SiO
SiC whisker
Slurry method

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10.1016/j.surfcoat.2025.132980

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title = "Liquid-phase-rich compensatory layer enabled self-healing in Si-SiO2/SiC-SiCw-Si bilayer anti-oxidation coating",

abstract = "A Si-SiO2/SiC-SiCw-Si bilayer anti-oxidation coating was prepared on C/C composites by the slurry method, chemical vapor deposition joint gaseous silicon infiltration. The specimen got a mass loss of 1.69 \% after 20 thermal cycles between 1773 K and room temperature, and a mass gain of 1.53 \% after 217 h of oxidation at 1773 K. The high fluidity of molten Si facilitated the outer layer's ability to replenish the inner layer, thereby healing defects within the coating. Combined with the viscous flow property of SiO2 during oxidation, the outer layer achieved a dynamic sealing. The coating integrated a liquid-phase-rich compensatory outer layer with a SiC whisker-reinforced crack-resistant inner layer, which worked synergistically to provide effective oxidation protection.",

keywords = "Anti-oxidation coating, C/C composites, Si-SiO, SiC whisker, Slurry method",

author = "Yaoying Zeng and Running Wang and Jiaping Zhang and Jiaqi Hou and Chenglong Tan and Hejun Li",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier B.V.",

year = "2026",

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day = "1",

doi = "10.1016/j.surfcoat.2025.132980",

language = "英语",

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TY - JOUR

T1 - Liquid-phase-rich compensatory layer enabled self-healing in Si-SiO2/SiC-SiCw-Si bilayer anti-oxidation coating

AU - Zeng, Yaoying

AU - Wang, Running

AU - Zhang, Jiaping

AU - Hou, Jiaqi

AU - Tan, Chenglong

AU - Li, Hejun

PY - 2026/1/1

Y1 - 2026/1/1

N2 - A Si-SiO2/SiC-SiCw-Si bilayer anti-oxidation coating was prepared on C/C composites by the slurry method, chemical vapor deposition joint gaseous silicon infiltration. The specimen got a mass loss of 1.69 % after 20 thermal cycles between 1773 K and room temperature, and a mass gain of 1.53 % after 217 h of oxidation at 1773 K. The high fluidity of molten Si facilitated the outer layer's ability to replenish the inner layer, thereby healing defects within the coating. Combined with the viscous flow property of SiO2 during oxidation, the outer layer achieved a dynamic sealing. The coating integrated a liquid-phase-rich compensatory outer layer with a SiC whisker-reinforced crack-resistant inner layer, which worked synergistically to provide effective oxidation protection.

AB - A Si-SiO2/SiC-SiCw-Si bilayer anti-oxidation coating was prepared on C/C composites by the slurry method, chemical vapor deposition joint gaseous silicon infiltration. The specimen got a mass loss of 1.69 % after 20 thermal cycles between 1773 K and room temperature, and a mass gain of 1.53 % after 217 h of oxidation at 1773 K. The high fluidity of molten Si facilitated the outer layer's ability to replenish the inner layer, thereby healing defects within the coating. Combined with the viscous flow property of SiO2 during oxidation, the outer layer achieved a dynamic sealing. The coating integrated a liquid-phase-rich compensatory outer layer with a SiC whisker-reinforced crack-resistant inner layer, which worked synergistically to provide effective oxidation protection.

KW - Anti-oxidation coating

KW - C/C composites

KW - Si-SiO

KW - SiC whisker

KW - Slurry method

UR - https://www.scopus.com/pages/publications/105022172215

U2 - 10.1016/j.surfcoat.2025.132980

DO - 10.1016/j.surfcoat.2025.132980

M3 - 文章

AN - SCOPUS:105022172215

SN - 0257-8972

VL - 519

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

M1 - 132980

ER -

Liquid-phase-rich compensatory layer enabled self-healing in Si-SiO₂/SiC-SiCw-Si bilayer anti-oxidation coating

Abstract

Keywords

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