Comparison of the oxidation behaviors of SiC coatings on C/C composites prepared by pack cementation and chemical vapor deposition

Lu Li; Hejun Li; Hongjiao Lin; Lei Zhuang; Shaolong Wang; Tao Feng; Xiyuan Yao; Qiangang Fu

doi:10.1016/j.surfcoat.2016.05.071

Comparison of the oxidation behaviors of SiC coatings on C/C composites prepared by pack cementation and chemical vapor deposition

Lu Li, Hejun Li, Hongjiao Lin, Lei Zhuang, Shaolong Wang, Tao Feng, Xiyuan Yao, Qiangang Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

105 Scopus citations

Abstract

SiC coatings were prepared on carbon/carbon composites by pack cementation (PC) and chemical vapor deposition (CVD). The PC coating was composed of hexagonal platelets of α-SiC, while the CVD coating consisted of spherical particles of β-SiC. Their oxidation behaviors were investigated at 1173 K, 1473 K and 1773 K. Compared with the CVD-SiC coating, bubbles appeared in the PC-SiC coating at lower oxidation temperature and the oxide layer was thicker, which might be ascribed to the formation of aluminosilicate glass in the PC-SiC coating. With the increasing temperature, the oxidation behavior of the PC-SiC coating transformed from linear to parabolic with dramatically improved oxidation resistance, which might be attributed to the decreased viscosity of SiO₂-rich glass and the good healing effect for cracks. The oxidation protective ability of the CVD-SiC coating was worse than that of the PC-SiC coating, because of the higher viscosity of pure SiO₂ glass and the inferior interface adhesion between the coating and the substrate.

Original language	English
Pages (from-to)	56-64
Number of pages	9
Journal	Surface and Coatings Technology
Volume	302
DOIs	https://doi.org/10.1016/j.surfcoat.2016.05.071
State	Published - 25 Sep 2016

Keywords

Carbon/carbon composites
Chemical vapor deposition
Oxidation
Pack cementation
SiC coating

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10.1016/j.surfcoat.2016.05.071

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title = "Comparison of the oxidation behaviors of SiC coatings on C/C composites prepared by pack cementation and chemical vapor deposition",

abstract = "SiC coatings were prepared on carbon/carbon composites by pack cementation (PC) and chemical vapor deposition (CVD). The PC coating was composed of hexagonal platelets of α-SiC, while the CVD coating consisted of spherical particles of β-SiC. Their oxidation behaviors were investigated at 1173 K, 1473 K and 1773 K. Compared with the CVD-SiC coating, bubbles appeared in the PC-SiC coating at lower oxidation temperature and the oxide layer was thicker, which might be ascribed to the formation of aluminosilicate glass in the PC-SiC coating. With the increasing temperature, the oxidation behavior of the PC-SiC coating transformed from linear to parabolic with dramatically improved oxidation resistance, which might be attributed to the decreased viscosity of SiO2-rich glass and the good healing effect for cracks. The oxidation protective ability of the CVD-SiC coating was worse than that of the PC-SiC coating, because of the higher viscosity of pure SiO2 glass and the inferior interface adhesion between the coating and the substrate.",

keywords = "Carbon/carbon composites, Chemical vapor deposition, Oxidation, Pack cementation, SiC coating",

author = "Lu Li and Hejun Li and Hongjiao Lin and Lei Zhuang and Shaolong Wang and Tao Feng and Xiyuan Yao and Qiangang Fu",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V..",

year = "2016",

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day = "25",

doi = "10.1016/j.surfcoat.2016.05.071",

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T1 - Comparison of the oxidation behaviors of SiC coatings on C/C composites prepared by pack cementation and chemical vapor deposition

AU - Li, Lu

AU - Li, Hejun

AU - Lin, Hongjiao

AU - Zhuang, Lei

AU - Wang, Shaolong

AU - Feng, Tao

AU - Yao, Xiyuan

AU - Fu, Qiangang

PY - 2016/9/25

Y1 - 2016/9/25

N2 - SiC coatings were prepared on carbon/carbon composites by pack cementation (PC) and chemical vapor deposition (CVD). The PC coating was composed of hexagonal platelets of α-SiC, while the CVD coating consisted of spherical particles of β-SiC. Their oxidation behaviors were investigated at 1173 K, 1473 K and 1773 K. Compared with the CVD-SiC coating, bubbles appeared in the PC-SiC coating at lower oxidation temperature and the oxide layer was thicker, which might be ascribed to the formation of aluminosilicate glass in the PC-SiC coating. With the increasing temperature, the oxidation behavior of the PC-SiC coating transformed from linear to parabolic with dramatically improved oxidation resistance, which might be attributed to the decreased viscosity of SiO2-rich glass and the good healing effect for cracks. The oxidation protective ability of the CVD-SiC coating was worse than that of the PC-SiC coating, because of the higher viscosity of pure SiO2 glass and the inferior interface adhesion between the coating and the substrate.

AB - SiC coatings were prepared on carbon/carbon composites by pack cementation (PC) and chemical vapor deposition (CVD). The PC coating was composed of hexagonal platelets of α-SiC, while the CVD coating consisted of spherical particles of β-SiC. Their oxidation behaviors were investigated at 1173 K, 1473 K and 1773 K. Compared with the CVD-SiC coating, bubbles appeared in the PC-SiC coating at lower oxidation temperature and the oxide layer was thicker, which might be ascribed to the formation of aluminosilicate glass in the PC-SiC coating. With the increasing temperature, the oxidation behavior of the PC-SiC coating transformed from linear to parabolic with dramatically improved oxidation resistance, which might be attributed to the decreased viscosity of SiO2-rich glass and the good healing effect for cracks. The oxidation protective ability of the CVD-SiC coating was worse than that of the PC-SiC coating, because of the higher viscosity of pure SiO2 glass and the inferior interface adhesion between the coating and the substrate.

KW - Carbon/carbon composites

KW - Chemical vapor deposition

KW - Oxidation

KW - Pack cementation

KW - SiC coating

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U2 - 10.1016/j.surfcoat.2016.05.071

DO - 10.1016/j.surfcoat.2016.05.071

M3 - 文章

AN - SCOPUS:84973375219

SN - 0257-8972

VL - 302

SP - 56

EP - 64

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

Comparison of the oxidation behaviors of SiC coatings on C/C composites prepared by pack cementation and chemical vapor deposition

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Keywords

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