A Si-Mo oxidation protective coating for C/SiC coated carbon/carbon composites

Yu Lei Zhang; He Jun Li; Qian Gang Fu; Ke Zhi Li; Dang She Hou; Jie Fei

doi:10.1016/j.carbon.2006.12.028

A Si-Mo oxidation protective coating for C/SiC coated carbon/carbon composites

Yu Lei Zhang, He Jun Li, Qian Gang Fu, Ke Zhi Li, Dang She Hou, Jie Fei

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

63 Scopus citations

Abstract

A novel Si Mo alloy coating was prepared on the surface of C/SiC coated carbon/carbon (C/C) composites by pack cementation to fill the C/SiC gradient inner layer, which was expected to protect C/C composites at 1773 K in air for long-term application. The microstructure, oxidation resistance and thermal shock resistance of the as-received coatings were also investigated. The cross-section SEM image of the as-obtained coating revealed that the C/SiC/Si Mo multi-coating is about 150 lm in thickness and there are no penetration cross-cracks or big holes in the coating. The coating can effectively protect C/C composites for more than 100 h in air at 1773 K and undergo the thermal cycling between 1773 K and room temperature for 40 cycles. The excellent oxidation resistance and thermal shock resistance of the coating can be attributed to the free silicon phase and C/SiC gradient inner layer, which can suppress the generation of the thermal stresses in the coating.

Original language	English
Pages (from-to)	1130-1133
Number of pages	4
Journal	Carbon
Volume	45
Issue number	5
DOIs	https://doi.org/10.1016/j.carbon.2006.12.028
State	Published - Apr 2007

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10.1016/j.carbon.2006.12.028

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title = "A Si-Mo oxidation protective coating for C/SiC coated carbon/carbon composites",

abstract = "A novel Si Mo alloy coating was prepared on the surface of C/SiC coated carbon/carbon (C/C) composites by pack cementation to fill the C/SiC gradient inner layer, which was expected to protect C/C composites at 1773 K in air for long-term application. The microstructure, oxidation resistance and thermal shock resistance of the as-received coatings were also investigated. The cross-section SEM image of the as-obtained coating revealed that the C/SiC/Si Mo multi-coating is about 150 lm in thickness and there are no penetration cross-cracks or big holes in the coating. The coating can effectively protect C/C composites for more than 100 h in air at 1773 K and undergo the thermal cycling between 1773 K and room temperature for 40 cycles. The excellent oxidation resistance and thermal shock resistance of the coating can be attributed to the free silicon phase and C/SiC gradient inner layer, which can suppress the generation of the thermal stresses in the coating.",

author = "Zhang, {Yu Lei} and Li, {He Jun} and Fu, {Qian Gang} and Li, {Ke Zhi} and Hou, {Dang She} and Jie Fei",

year = "2007",

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doi = "10.1016/j.carbon.2006.12.028",

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journal = "Carbon",

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TY - JOUR

T1 - A Si-Mo oxidation protective coating for C/SiC coated carbon/carbon composites

AU - Zhang, Yu Lei

AU - Li, He Jun

AU - Fu, Qian Gang

AU - Li, Ke Zhi

AU - Hou, Dang She

AU - Fei, Jie

PY - 2007/4

Y1 - 2007/4

N2 - A novel Si Mo alloy coating was prepared on the surface of C/SiC coated carbon/carbon (C/C) composites by pack cementation to fill the C/SiC gradient inner layer, which was expected to protect C/C composites at 1773 K in air for long-term application. The microstructure, oxidation resistance and thermal shock resistance of the as-received coatings were also investigated. The cross-section SEM image of the as-obtained coating revealed that the C/SiC/Si Mo multi-coating is about 150 lm in thickness and there are no penetration cross-cracks or big holes in the coating. The coating can effectively protect C/C composites for more than 100 h in air at 1773 K and undergo the thermal cycling between 1773 K and room temperature for 40 cycles. The excellent oxidation resistance and thermal shock resistance of the coating can be attributed to the free silicon phase and C/SiC gradient inner layer, which can suppress the generation of the thermal stresses in the coating.

AB - A novel Si Mo alloy coating was prepared on the surface of C/SiC coated carbon/carbon (C/C) composites by pack cementation to fill the C/SiC gradient inner layer, which was expected to protect C/C composites at 1773 K in air for long-term application. The microstructure, oxidation resistance and thermal shock resistance of the as-received coatings were also investigated. The cross-section SEM image of the as-obtained coating revealed that the C/SiC/Si Mo multi-coating is about 150 lm in thickness and there are no penetration cross-cracks or big holes in the coating. The coating can effectively protect C/C composites for more than 100 h in air at 1773 K and undergo the thermal cycling between 1773 K and room temperature for 40 cycles. The excellent oxidation resistance and thermal shock resistance of the coating can be attributed to the free silicon phase and C/SiC gradient inner layer, which can suppress the generation of the thermal stresses in the coating.

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U2 - 10.1016/j.carbon.2006.12.028

DO - 10.1016/j.carbon.2006.12.028

M3 - 快报

AN - SCOPUS:34147110744

SN - 0008-6223

VL - 45

SP - 1130

EP - 1133

JO - Carbon

JF - Carbon

IS - 5

ER -

A Si-Mo oxidation protective coating for C/SiC coated carbon/carbon composites

Abstract

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