Oxidation protective silicon carbide coating for C/SiC composite modified by a chromium silicide-chromium carbide outer layer

Shoujun Wu; Yiguang Wang; Qiang Guo; Bin Guo; Lei Luo

doi:10.1016/j.msea.2015.07.081

Oxidation protective silicon carbide coating for C/SiC composite modified by a chromium silicide-chromium carbide outer layer

Shoujun Wu^*, Yiguang Wang, Qiang Guo, Bin Guo, Lei Luo

^*Corresponding author for this work

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

26 Citations (Scopus)

Abstract

A chromium silicide-chromium carbide (Cr₃Si-Cr₇C₃) outer layer mainly composed of Cr₃Si, Cr₇C₃, and a small amount of Cr₃C₂ was prepared on a SiC coated carbon fiber reinforced silicon carbide (C/SiC) composite using a Powder Immersion Reaction Assisted Coating (PIRAC) method. The Cr₃Si-Cr₇C₃ outer layer showed folded ridge morphology. The width of the largest microcracks on the outer layer of the Cr₃Si-Cr₇C₃/SiC/SiC coating was only one forth of that on the outer layer of the SiC/SiC/SiC coating. The Cr₃Si-Cr₇C₃/SiC/SiC coating showed significantly enhanced oxidation protection compared to the SiC/SiC/SiC coating. After oxidation for 10h, the Cr₃Si-Cr₇C₃/SiC/SiC coated composite showed nearly the same failure behavior and residual flexural strength as that of the as-received composite.

Original language	English
Pages (from-to)	268-274
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	644
DOIs	https://doi.org/10.1016/j.msea.2015.07.081
Publication status	Published - 7 Sept 2015
Externally published	Yes

Keywords

C/SiC composite
CVD SiC
CrSi-CrC
Oxidation
Strength

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10.1016/j.msea.2015.07.081

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title = "Oxidation protective silicon carbide coating for C/SiC composite modified by a chromium silicide-chromium carbide outer layer",

abstract = "A chromium silicide-chromium carbide (Cr3Si-Cr7C3) outer layer mainly composed of Cr3Si, Cr7C3, and a small amount of Cr3C2 was prepared on a SiC coated carbon fiber reinforced silicon carbide (C/SiC) composite using a Powder Immersion Reaction Assisted Coating (PIRAC) method. The Cr3Si-Cr7C3 outer layer showed folded ridge morphology. The width of the largest microcracks on the outer layer of the Cr3Si-Cr7C3/SiC/SiC coating was only one forth of that on the outer layer of the SiC/SiC/SiC coating. The Cr3Si-Cr7C3/SiC/SiC coating showed significantly enhanced oxidation protection compared to the SiC/SiC/SiC coating. After oxidation for 10h, the Cr3Si-Cr7C3/SiC/SiC coated composite showed nearly the same failure behavior and residual flexural strength as that of the as-received composite.",

keywords = "C/SiC composite, CVD SiC, CrSi-CrC, Oxidation, Strength",

author = "Shoujun Wu and Yiguang Wang and Qiang Guo and Bin Guo and Lei Luo",

note = "Publisher Copyright: {\textcopyright} 2015 Published by Elsevier B.V.",

year = "2015",

month = sep,

day = "7",

doi = "10.1016/j.msea.2015.07.081",

language = "English",

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journal = "Materials Science and Engineering: A",

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TY - JOUR

T1 - Oxidation protective silicon carbide coating for C/SiC composite modified by a chromium silicide-chromium carbide outer layer

AU - Wu, Shoujun

AU - Wang, Yiguang

AU - Guo, Qiang

AU - Guo, Bin

AU - Luo, Lei

PY - 2015/9/7

Y1 - 2015/9/7

N2 - A chromium silicide-chromium carbide (Cr3Si-Cr7C3) outer layer mainly composed of Cr3Si, Cr7C3, and a small amount of Cr3C2 was prepared on a SiC coated carbon fiber reinforced silicon carbide (C/SiC) composite using a Powder Immersion Reaction Assisted Coating (PIRAC) method. The Cr3Si-Cr7C3 outer layer showed folded ridge morphology. The width of the largest microcracks on the outer layer of the Cr3Si-Cr7C3/SiC/SiC coating was only one forth of that on the outer layer of the SiC/SiC/SiC coating. The Cr3Si-Cr7C3/SiC/SiC coating showed significantly enhanced oxidation protection compared to the SiC/SiC/SiC coating. After oxidation for 10h, the Cr3Si-Cr7C3/SiC/SiC coated composite showed nearly the same failure behavior and residual flexural strength as that of the as-received composite.

AB - A chromium silicide-chromium carbide (Cr3Si-Cr7C3) outer layer mainly composed of Cr3Si, Cr7C3, and a small amount of Cr3C2 was prepared on a SiC coated carbon fiber reinforced silicon carbide (C/SiC) composite using a Powder Immersion Reaction Assisted Coating (PIRAC) method. The Cr3Si-Cr7C3 outer layer showed folded ridge morphology. The width of the largest microcracks on the outer layer of the Cr3Si-Cr7C3/SiC/SiC coating was only one forth of that on the outer layer of the SiC/SiC/SiC coating. The Cr3Si-Cr7C3/SiC/SiC coating showed significantly enhanced oxidation protection compared to the SiC/SiC/SiC coating. After oxidation for 10h, the Cr3Si-Cr7C3/SiC/SiC coated composite showed nearly the same failure behavior and residual flexural strength as that of the as-received composite.

KW - C/SiC composite

KW - CVD SiC

KW - CrSi-CrC

KW - Oxidation

KW - Strength

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U2 - 10.1016/j.msea.2015.07.081

DO - 10.1016/j.msea.2015.07.081

M3 - Article

AN - SCOPUS:84938240875

SN - 0921-5093

VL - 644

SP - 268

EP - 274

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Oxidation protective silicon carbide coating for C/SiC composite modified by a chromium silicide-chromium carbide outer layer

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Keywords

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