Double layer ZrSi2-ZrC-SiC/SiC oxidation protective coating for carbon/carbon composites

M. H. Hu; K. Z. Li; H. J. Li; B. Wang; H. L. Ma

doi:10.1179/1743294414Y.0000000428

Double layer ZrSi₂-ZrC-SiC/SiC oxidation protective coating for carbon/carbon composites

M. H. Hu, K. Z. Li, H. J. Li, B. Wang, H. L. Ma

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

33 Scopus citations

Abstract

A ZrSi₂-ZrC-SiC/SiC double layer coating was prepared on the surface of carbon/carbon (C/C) composites by pack cementation. The microstructure, oxidation and thermal shock resistance of the coating were studied. These results show that the outer coating is mainly composed of ZrSi₂, ZrC, SiC and Si respectively. Oxidation tests were conducted in air at 1173 K for 100 min and 1773 K for 67 h and a weight decrease of 0·37 and 0 ·12% were recorded. After 20 times thermal shocks between 1773 K and room temperature, the weight of the coated specimens increased by only 0·12%. The excellent thermal shock resistance is attributed to the aptness to oxidation of the minor phases distributing in the gaps among the SiC particles and the coarseness of the coating.

Original language	English
Pages (from-to)	335-341
Number of pages	7
Journal	Surface Engineering
Volume	31
Issue number	5
DOIs	https://doi.org/10.1179/1743294414Y.0000000428
State	Published - 1 Apr 2015

Keywords

Carbon/carbon composites
Coating
Oxidation
Thermal shock

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10.1179/1743294414Y.0000000428

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title = "Double layer ZrSi2-ZrC-SiC/SiC oxidation protective coating for carbon/carbon composites",

abstract = "A ZrSi2-ZrC-SiC/SiC double layer coating was prepared on the surface of carbon/carbon (C/C) composites by pack cementation. The microstructure, oxidation and thermal shock resistance of the coating were studied. These results show that the outer coating is mainly composed of ZrSi2, ZrC, SiC and Si respectively. Oxidation tests were conducted in air at 1173 K for 100 min and 1773 K for 67 h and a weight decrease of 0·37 and 0 ·12% were recorded. After 20 times thermal shocks between 1773 K and room temperature, the weight of the coated specimens increased by only 0·12%. The excellent thermal shock resistance is attributed to the aptness to oxidation of the minor phases distributing in the gaps among the SiC particles and the coarseness of the coating.",

keywords = "Carbon/carbon composites, Coating, Oxidation, Thermal shock",

author = "Hu, {M. H.} and Li, {K. Z.} and Li, {H. J.} and B. Wang and Ma, {H. L.}",

note = "Publisher Copyright: {\textcopyright} 2015 Institute of Materials, Minerals and Mining Published by Maney on behalf of the Institute.",

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doi = "10.1179/1743294414Y.0000000428",

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TY - JOUR

T1 - Double layer ZrSi2-ZrC-SiC/SiC oxidation protective coating for carbon/carbon composites

AU - Hu, M. H.

AU - Li, K. Z.

AU - Li, H. J.

AU - Wang, B.

AU - Ma, H. L.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - A ZrSi2-ZrC-SiC/SiC double layer coating was prepared on the surface of carbon/carbon (C/C) composites by pack cementation. The microstructure, oxidation and thermal shock resistance of the coating were studied. These results show that the outer coating is mainly composed of ZrSi2, ZrC, SiC and Si respectively. Oxidation tests were conducted in air at 1173 K for 100 min and 1773 K for 67 h and a weight decrease of 0·37 and 0 ·12% were recorded. After 20 times thermal shocks between 1773 K and room temperature, the weight of the coated specimens increased by only 0·12%. The excellent thermal shock resistance is attributed to the aptness to oxidation of the minor phases distributing in the gaps among the SiC particles and the coarseness of the coating.

AB - A ZrSi2-ZrC-SiC/SiC double layer coating was prepared on the surface of carbon/carbon (C/C) composites by pack cementation. The microstructure, oxidation and thermal shock resistance of the coating were studied. These results show that the outer coating is mainly composed of ZrSi2, ZrC, SiC and Si respectively. Oxidation tests were conducted in air at 1173 K for 100 min and 1773 K for 67 h and a weight decrease of 0·37 and 0 ·12% were recorded. After 20 times thermal shocks between 1773 K and room temperature, the weight of the coated specimens increased by only 0·12%. The excellent thermal shock resistance is attributed to the aptness to oxidation of the minor phases distributing in the gaps among the SiC particles and the coarseness of the coating.

KW - Carbon/carbon composites

KW - Coating

KW - Oxidation

KW - Thermal shock

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U2 - 10.1179/1743294414Y.0000000428

DO - 10.1179/1743294414Y.0000000428

M3 - 文章

AN - SCOPUS:84938945702

SN - 0267-0844

VL - 31

SP - 335

EP - 341

JO - Surface Engineering

JF - Surface Engineering

IS - 5

ER -

Double layer ZrSi₂-ZrC-SiC/SiC oxidation protective coating for carbon/carbon composites

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Keywords

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