W-Mo-Si/SiC oxidation protective coating for carbon/carbon composites

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

W-Mo-Si/SiC oxidation protective coating for carbon/carbon composites

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

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

8 Scopus citations

Abstract

A W-Mo-Si/SiC double-layer oxidation protective coating for carbon/carbon (C/C) composites was prepared by a two-step pack cementation technique. XRD (X-ray diffraction) and SEM (scanning electron microscopy) results show that the coating obtained by the first step pack cementation was a thin inner buffer layer of SiC with some cracks and pores, and a new phase of (W_xMo_1-x) Si₂ appeared after the second step pack cementation. Oxidation test shows that, after oxidation in air at 1773 K for 175 h and thermal cycling between 1773 K and room temperature for 18 times, the weight loss of the W-Mo-Si/SiC coated C/C composites was only 2.06%. The oxidation protective failure of the W-Mo-Si/SiC coating was attributed to the formation of some penetrable cracks in the coating.

Original language	English
Pages (from-to)	559-562
Number of pages	4
Journal	Journal of Materials Science and Technology
Volume	23
Issue number	4
State	Published - Jul 2007

Keywords

C/C composites
Coating
Microstructure
Oxidation

Cite this

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title = "W-Mo-Si/SiC oxidation protective coating for carbon/carbon composites",

abstract = "A W-Mo-Si/SiC double-layer oxidation protective coating for carbon/carbon (C/C) composites was prepared by a two-step pack cementation technique. XRD (X-ray diffraction) and SEM (scanning electron microscopy) results show that the coating obtained by the first step pack cementation was a thin inner buffer layer of SiC with some cracks and pores, and a new phase of (WxMo1-x) Si2 appeared after the second step pack cementation. Oxidation test shows that, after oxidation in air at 1773 K for 175 h and thermal cycling between 1773 K and room temperature for 18 times, the weight loss of the W-Mo-Si/SiC coated C/C composites was only 2.06%. The oxidation protective failure of the W-Mo-Si/SiC coating was attributed to the formation of some penetrable cracks in the coating.",

keywords = "C/C composites, Coating, Microstructure, Oxidation",

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

year = "2007",

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language = "英语",

volume = "23",

pages = "559--562",

journal = "Journal of Materials Science and Technology",

issn = "1005-0302",

publisher = "Chinese Society of Metals",

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TY - JOUR

T1 - W-Mo-Si/SiC oxidation protective coating for carbon/carbon composites

AU - Hou, Dangshe

AU - Li, Kezhi

AU - Li, Hejun

AU - Fu, Qiangang

AU - Wei, Jian

AU - Zhang, Yulei

PY - 2007/7

Y1 - 2007/7

N2 - A W-Mo-Si/SiC double-layer oxidation protective coating for carbon/carbon (C/C) composites was prepared by a two-step pack cementation technique. XRD (X-ray diffraction) and SEM (scanning electron microscopy) results show that the coating obtained by the first step pack cementation was a thin inner buffer layer of SiC with some cracks and pores, and a new phase of (WxMo1-x) Si2 appeared after the second step pack cementation. Oxidation test shows that, after oxidation in air at 1773 K for 175 h and thermal cycling between 1773 K and room temperature for 18 times, the weight loss of the W-Mo-Si/SiC coated C/C composites was only 2.06%. The oxidation protective failure of the W-Mo-Si/SiC coating was attributed to the formation of some penetrable cracks in the coating.

AB - A W-Mo-Si/SiC double-layer oxidation protective coating for carbon/carbon (C/C) composites was prepared by a two-step pack cementation technique. XRD (X-ray diffraction) and SEM (scanning electron microscopy) results show that the coating obtained by the first step pack cementation was a thin inner buffer layer of SiC with some cracks and pores, and a new phase of (WxMo1-x) Si2 appeared after the second step pack cementation. Oxidation test shows that, after oxidation in air at 1773 K for 175 h and thermal cycling between 1773 K and room temperature for 18 times, the weight loss of the W-Mo-Si/SiC coated C/C composites was only 2.06%. The oxidation protective failure of the W-Mo-Si/SiC coating was attributed to the formation of some penetrable cracks in the coating.

KW - C/C composites

KW - Coating

KW - Microstructure

KW - Oxidation

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M3 - 文章

AN - SCOPUS:34547970536

SN - 1005-0302

VL - 23

SP - 559

EP - 562

JO - Journal of Materials Science and Technology

JF - Journal of Materials Science and Technology

IS - 4

ER -

W-Mo-Si/SiC oxidation protective coating for carbon/carbon composites

Abstract

Keywords

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