ZrB2-SiC-Ta4HfC5/Ta4HfC5 Oxidation-Resistant Dual-Layer Coating Fabricated by Spark Plasma Sintering for C/C Composites

In this work, a ZrB 2 -SiC-Ta 4 HfC 5 /Ta 4 HfC 5 oxidation-resistant dual-layer coating was fabricated to improve the oxidation resistance of carbon–carbon (C/C) composites. The coating was prepared by pack cementation combined with the slurry paste method. Spark plasma sintering was used in the pr...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2019, Vol.28 (1), p.512-518
Main Authors: Zhou, Changling, Qi, Yushi, Cheng, Yehong, Han, Wenbo
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Quality Control
Reliability
Safety and Risk
Tribology
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Summary:In this work, a ZrB 2 -SiC-Ta 4 HfC 5 /Ta 4 HfC 5 oxidation-resistant dual-layer coating was fabricated to improve the oxidation resistance of carbon–carbon (C/C) composites. The coating was prepared by pack cementation combined with the slurry paste method. Spark plasma sintering was used in the procedure. The as-prepared dual-layer coating was approximately 110 μm, and no distinct interface was observed between the coating and the matrix. The isothermal oxidation test results showed that the dual coating effectively prevented C/C composites from oxidizing. The weight loss of the coated samples was only 3.3 and 9.5% after oxidation at 1773 K for 20 h and ten thermal shock cycles between 1773 K and room temperature in air, respectively. The pores and microcracks were the main reason for the failure of the coating.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-018-3807-7