SiC/Si-W-Mo coating for protection of C/C composites at 1873 K

Dangshe Hou; Kezhi Li; Hejun Li; Qiangang Fu; Yulei Zhang

doi:10.1016/S1005-8850(08)60294-7

SiC/Si-W-Mo coating for protection of C/C composites at 1873 K

Dangshe Hou, Kezhi Li, Hejun Li, Qiangang Fu, Yulei Zhang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

5 Scopus citations

Abstract

In order to prevent carbon/carbon composites from oxidation at 1873 K, an efficient oxidation protective SiC/Si-W-Mo coating was prepared by a two-step pack cementation technique. The microstructures and the phase composition of the as-received multi-coating were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It is seen that the compact multi-coating is composed of α-SiC, Si, and (W_xMo_1-x)Si₂. Oxidation test shows that, after oxidation at 1873 K in air for 102 h and thermal cycling between 1873 K and room temperature for 10 times, the weight loss of the SiC/Si-W-Mo coated C/C composites is only 0.26%. The invalidation of the multi-coating is attributed to the formation of penetrable cracks in the coating.

Original language	English
Pages (from-to)	822-826
Number of pages	5
Journal	Journal of University of Science and Technology Beijing: Mineral Metallurgy Materials (Eng Ed)
Volume	15
Issue number	6
DOIs	https://doi.org/10.1016/S1005-8850(08)60294-7
State	Published - Dec 2008

Keywords

C/C composites
coating
microstructure
oxidation protection

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10.1016/S1005-8850(08)60294-7

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title = "SiC/Si-W-Mo coating for protection of C/C composites at 1873 K",

abstract = "In order to prevent carbon/carbon composites from oxidation at 1873 K, an efficient oxidation protective SiC/Si-W-Mo coating was prepared by a two-step pack cementation technique. The microstructures and the phase composition of the as-received multi-coating were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It is seen that the compact multi-coating is composed of α-SiC, Si, and (WxMo1-x)Si2. Oxidation test shows that, after oxidation at 1873 K in air for 102 h and thermal cycling between 1873 K and room temperature for 10 times, the weight loss of the SiC/Si-W-Mo coated C/C composites is only 0.26%. The invalidation of the multi-coating is attributed to the formation of penetrable cracks in the coating.",

keywords = "C/C composites, coating, microstructure, oxidation protection",

author = "Dangshe Hou and Kezhi Li and Hejun Li and Qiangang Fu and Yulei Zhang",

year = "2008",

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T1 - SiC/Si-W-Mo coating for protection of C/C composites at 1873 K

AU - Hou, Dangshe

AU - Li, Kezhi

AU - Li, Hejun

AU - Fu, Qiangang

AU - Zhang, Yulei

PY - 2008/12

Y1 - 2008/12

N2 - In order to prevent carbon/carbon composites from oxidation at 1873 K, an efficient oxidation protective SiC/Si-W-Mo coating was prepared by a two-step pack cementation technique. The microstructures and the phase composition of the as-received multi-coating were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It is seen that the compact multi-coating is composed of α-SiC, Si, and (WxMo1-x)Si2. Oxidation test shows that, after oxidation at 1873 K in air for 102 h and thermal cycling between 1873 K and room temperature for 10 times, the weight loss of the SiC/Si-W-Mo coated C/C composites is only 0.26%. The invalidation of the multi-coating is attributed to the formation of penetrable cracks in the coating.

AB - In order to prevent carbon/carbon composites from oxidation at 1873 K, an efficient oxidation protective SiC/Si-W-Mo coating was prepared by a two-step pack cementation technique. The microstructures and the phase composition of the as-received multi-coating were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It is seen that the compact multi-coating is composed of α-SiC, Si, and (WxMo1-x)Si2. Oxidation test shows that, after oxidation at 1873 K in air for 102 h and thermal cycling between 1873 K and room temperature for 10 times, the weight loss of the SiC/Si-W-Mo coated C/C composites is only 0.26%. The invalidation of the multi-coating is attributed to the formation of penetrable cracks in the coating.

KW - C/C composites

KW - coating

KW - microstructure

KW - oxidation protection

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U2 - 10.1016/S1005-8850(08)60294-7

DO - 10.1016/S1005-8850(08)60294-7

M3 - 文章

AN - SCOPUS:58149185245

SN - 1005-8850

VL - 15

SP - 822

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JO - Journal of University of Science and Technology Beijing: Mineral Metallurgy Materials (Eng Ed)

JF - Journal of University of Science and Technology Beijing: Mineral Metallurgy Materials (Eng Ed)

IS - 6

ER -

SiC/Si-W-Mo coating for protection of C/C composites at 1873 K

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Keywords

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