Oxidation behavior of 2D C/SiC with a multi-layer CVD SiC coating

Shoujun Wu; Laifei Cheng; Litong Zhang; Yongdong Xu

doi:10.1016/j.surfcoat.2005.03.009

Oxidation behavior of 2D C/SiC with a multi-layer CVD SiC coating

Shoujun Wu, Laifei Cheng, Litong Zhang, Yongdong Xu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

55 Scopus citations

Abstract

The oxidation behavior of a 2D C/SiC with a multi-layer CVD SiC coating deposited slowly was investigated in simulated air at 1300 °C using a thermogravimetric (TG) device. No gaps were observed between the layers in the dense coating by SEM. The composite showed a continuous weight gain during the oxidation period of 15 h at 1300 °C. The relationship between weight gain and time showed two different oxidation behaviors: rapid oxidation and rigid oxidation. The rapid oxidation fitted a parabolic law and surface oxidation of the SiC coating, while the rigid oxidation fitted a quasi-linear manner and correlated with continuously formation and sealing of defects in silicon dioxide film. The film showed a phase transition from amorphous SiO₂ to cristobalite.

Original language	English
Pages (from-to)	4489-4492
Number of pages	4
Journal	Surface and Coatings Technology
Volume	200
Issue number	14-15
DOIs	https://doi.org/10.1016/j.surfcoat.2005.03.009
State	Published - 10 Apr 2006

Keywords

C/SiC composite
Coating
Oxidation
Phase transition

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10.1016/j.surfcoat.2005.03.009

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abstract = "The oxidation behavior of a 2D C/SiC with a multi-layer CVD SiC coating deposited slowly was investigated in simulated air at 1300 °C using a thermogravimetric (TG) device. No gaps were observed between the layers in the dense coating by SEM. The composite showed a continuous weight gain during the oxidation period of 15 h at 1300 °C. The relationship between weight gain and time showed two different oxidation behaviors: rapid oxidation and rigid oxidation. The rapid oxidation fitted a parabolic law and surface oxidation of the SiC coating, while the rigid oxidation fitted a quasi-linear manner and correlated with continuously formation and sealing of defects in silicon dioxide film. The film showed a phase transition from amorphous SiO2 to cristobalite.",

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T1 - Oxidation behavior of 2D C/SiC with a multi-layer CVD SiC coating

AU - Wu, Shoujun

AU - Cheng, Laifei

AU - Zhang, Litong

AU - Xu, Yongdong

PY - 2006/4/10

Y1 - 2006/4/10

N2 - The oxidation behavior of a 2D C/SiC with a multi-layer CVD SiC coating deposited slowly was investigated in simulated air at 1300 °C using a thermogravimetric (TG) device. No gaps were observed between the layers in the dense coating by SEM. The composite showed a continuous weight gain during the oxidation period of 15 h at 1300 °C. The relationship between weight gain and time showed two different oxidation behaviors: rapid oxidation and rigid oxidation. The rapid oxidation fitted a parabolic law and surface oxidation of the SiC coating, while the rigid oxidation fitted a quasi-linear manner and correlated with continuously formation and sealing of defects in silicon dioxide film. The film showed a phase transition from amorphous SiO2 to cristobalite.

AB - The oxidation behavior of a 2D C/SiC with a multi-layer CVD SiC coating deposited slowly was investigated in simulated air at 1300 °C using a thermogravimetric (TG) device. No gaps were observed between the layers in the dense coating by SEM. The composite showed a continuous weight gain during the oxidation period of 15 h at 1300 °C. The relationship between weight gain and time showed two different oxidation behaviors: rapid oxidation and rigid oxidation. The rapid oxidation fitted a parabolic law and surface oxidation of the SiC coating, while the rigid oxidation fitted a quasi-linear manner and correlated with continuously formation and sealing of defects in silicon dioxide film. The film showed a phase transition from amorphous SiO2 to cristobalite.

KW - C/SiC composite

KW - Coating

KW - Oxidation

KW - Phase transition

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U2 - 10.1016/j.surfcoat.2005.03.009

DO - 10.1016/j.surfcoat.2005.03.009

M3 - 文章

AN - SCOPUS:33644699321

SN - 0257-8972

VL - 200

SP - 4489

EP - 4492

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

IS - 14-15

ER -

Oxidation behavior of 2D C/SiC with a multi-layer CVD SiC coating

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Keywords

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