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Heat dissipation of carbon shell in ZrC–SiC/TaC coating to improve protective ability against ultrahigh temperature ablation

Authors :
Yuyu Zhang
Xuemeng Zhang
Hongkang Ou
Bozhe Wang
Jia Sun
Qiangang Fu
Source :
Journal of Advanced Ceramics, Vol 13, Iss 7, Pp 1080-1091 (2024)
Publication Year :
2024
Publisher :
Tsinghua University Press, 2024.

Abstract

To efficiently decrease ablation heat accumulation and improve the ability of ZrC–SiC/TaC coatings to protect carbon/carbon (C/C) composites, a thermally conductive nanonetwork with a ceramic@carbon core–shell structure was designed and constructed. Polymer-derived SiC/TaC with a graphene carbon shell was synthesized and introduced into a ZrC coating by supersonic atmospheric plasma spraying (SAPS). Graphene shell paths increased the heat transfer capability by lowering the surface temperature to approximately 200 °C during oxyacetylene ablation. The heat dissipation of the graphene shell in the ZrC–SiC/TaC@C coating reduced the volatilization of low-melting-point phases and delayed the sintering of ZrO2 particles. Thus, the graphene shell in ZrC–SiC/TaC@C coating decreased the mass and linear ablation rates by 91.4% and 93.7% compared to ZrC–SiC/TaC coating, respectively. This work provided a constructive idea for improving the ablation resistance of the coatings by incorporating carbon nanomaterials as a function of heat dissipation.

Details

Language :
English
ISSN :
22264108 and 22278508
Volume :
13
Issue :
7
Database :
Directory of Open Access Journals
Journal :
Journal of Advanced Ceramics
Publication Type :
Academic Journal
Accession number :
edsdoj.9f3c9e6d26e04d2bb9d4de399e5ce4bd
Document Type :
article
Full Text :
https://doi.org/10.26599/JAC.2024.9220921