Modified SiC-MoSi 2 oxidation protective coating for SiC-coated carbon/carbon composites through infiltrating liquid Si

Zheng Zhong Zhang; He Jun Li; Chao Ma; Qian Gang Fu; Yu Lei Zhang; Heng Wu; Jun Tao

doi:10.1142/S0218625X11014539

Modified SiC-MoSi ₂ oxidation protective coating for SiC-coated carbon/carbon composites through infiltrating liquid Si

Zheng Zhong Zhang, He Jun Li, Chao Ma, Qian Gang Fu, Yu Lei Zhang, Heng Wu, Jun Tao

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

3 Scopus citations

Abstract

To improve the oxidation resistance of the SiC-MoSi ₂ coating prepared by two-step pack cementation, a liquid Si infiltrating method was adopted to modify it. The phase composition and microstructure of the coatings were analyzed by XRD and SEM. The results show that the size and number of the cracks in the modified coating decreased evidently after infiltrating Si. The oxidation test results in air at 1773 K show that the mass loss of the SiC-MoSi ₂ coating coated carbon/carbon (C/C) composites was up to 1.18% after oxidation for 206 h, while that of the modified coating coated C/C composites was only 0.77% after oxidation for 460 h. The reason is that the cracks formed in the pack cementation process were partly sealed and there were no penetrable cracks in the modified coating. Therefore, there were no direct channels for the oxygen to diffuse into the C/C substrate.

Original language	English
Pages (from-to)	109-114
Number of pages	6
Journal	Surface Review and Letters
Volume	18
Issue number	3-4
DOIs	https://doi.org/10.1142/S0218625X11014539
State	Published - Jun 2011

Keywords

Carbon/carbon composites
coating
SiC
SiO

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title = "Modified SiC-MoSi 2 oxidation protective coating for SiC-coated carbon/carbon composites through infiltrating liquid Si",

abstract = "To improve the oxidation resistance of the SiC-MoSi 2 coating prepared by two-step pack cementation, a liquid Si infiltrating method was adopted to modify it. The phase composition and microstructure of the coatings were analyzed by XRD and SEM. The results show that the size and number of the cracks in the modified coating decreased evidently after infiltrating Si. The oxidation test results in air at 1773 K show that the mass loss of the SiC-MoSi 2 coating coated carbon/carbon (C/C) composites was up to 1.18% after oxidation for 206 h, while that of the modified coating coated C/C composites was only 0.77% after oxidation for 460 h. The reason is that the cracks formed in the pack cementation process were partly sealed and there were no penetrable cracks in the modified coating. Therefore, there were no direct channels for the oxygen to diffuse into the C/C substrate.",

keywords = "Carbon/carbon composites, coating, SiC, SiO",

author = "Zhang, {Zheng Zhong} and Li, {He Jun} and Chao Ma and Fu, {Qian Gang} and Zhang, {Yu Lei} and Heng Wu and Jun Tao",

year = "2011",

month = jun,

doi = "10.1142/S0218625X11014539",

language = "英语",

volume = "18",

pages = "109--114",

journal = "Surface Review and Letters",

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publisher = "World Scientific Publishing Co. Pte Ltd",

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}

TY - JOUR

T1 - Modified SiC-MoSi 2 oxidation protective coating for SiC-coated carbon/carbon composites through infiltrating liquid Si

AU - Zhang, Zheng Zhong

AU - Li, He Jun

AU - Ma, Chao

AU - Fu, Qian Gang

AU - Zhang, Yu Lei

AU - Wu, Heng

AU - Tao, Jun

PY - 2011/6

Y1 - 2011/6

N2 - To improve the oxidation resistance of the SiC-MoSi 2 coating prepared by two-step pack cementation, a liquid Si infiltrating method was adopted to modify it. The phase composition and microstructure of the coatings were analyzed by XRD and SEM. The results show that the size and number of the cracks in the modified coating decreased evidently after infiltrating Si. The oxidation test results in air at 1773 K show that the mass loss of the SiC-MoSi 2 coating coated carbon/carbon (C/C) composites was up to 1.18% after oxidation for 206 h, while that of the modified coating coated C/C composites was only 0.77% after oxidation for 460 h. The reason is that the cracks formed in the pack cementation process were partly sealed and there were no penetrable cracks in the modified coating. Therefore, there were no direct channels for the oxygen to diffuse into the C/C substrate.

AB - To improve the oxidation resistance of the SiC-MoSi 2 coating prepared by two-step pack cementation, a liquid Si infiltrating method was adopted to modify it. The phase composition and microstructure of the coatings were analyzed by XRD and SEM. The results show that the size and number of the cracks in the modified coating decreased evidently after infiltrating Si. The oxidation test results in air at 1773 K show that the mass loss of the SiC-MoSi 2 coating coated carbon/carbon (C/C) composites was up to 1.18% after oxidation for 206 h, while that of the modified coating coated C/C composites was only 0.77% after oxidation for 460 h. The reason is that the cracks formed in the pack cementation process were partly sealed and there were no penetrable cracks in the modified coating. Therefore, there were no direct channels for the oxygen to diffuse into the C/C substrate.

KW - Carbon/carbon composites

KW - coating

KW - SiC

KW - SiO

UR - http://www.scopus.com/inward/record.url?scp=83755183235&partnerID=8YFLogxK

U2 - 10.1142/S0218625X11014539

DO - 10.1142/S0218625X11014539

M3 - 文章

AN - SCOPUS:83755183235

SN - 0218-625X

VL - 18

SP - 109

EP - 114

JO - Surface Review and Letters

JF - Surface Review and Letters

IS - 3-4

ER -

Modified SiC-MoSi ₂ oxidation protective coating for SiC-coated carbon/carbon composites through infiltrating liquid Si

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Keywords

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