SiC Nanowires Toughed HfC Ablative Coating for C/C Composites

SiC Nanowires Toughed HfC Ablative Coating for C/C Composites

In order to improve ablation resistance of carbon/carbon(C/C) composites,SiC nanowires were prepared on C/C composites surface in prior through chemical vapor reaction before HfC coating.SiC nanowires grew randomly and had good combination with HfC coating.SiC nanowires toughed HfC coating had lower...

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Veröffentlicht in:Journal of materials science & technology 2015-01, Vol.31 (1), p.70-76
Hauptverfasser: Li, Hejun, Wang, Yongjie, Fu, Qiangang, Chu, Yanhui
Format: Artikel
Sprache:eng
Schlagworte:
Ablation
Ablation performance
Carbide
Carbon
Carbon-carbon composites
Ceramic coating
Chemical vapor deposition
Coating
composites
Carb
Corrosion resistance
Hafnium oxide
HFC
Nanowires
performance
Carbon/carbon
Silicon carbide
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Zusammenfassung:In order to improve ablation resistance of carbon/carbon(C/C) composites,SiC nanowires were prepared on C/C composites surface in prior through chemical vapor reaction before HfC coating.SiC nanowires grew randomly and had good combination with HfC coating.SiC nanowires toughed HfC coating had lower linear and mass ablation rates than original HfC coating.The surface was much flatter and exhibited smaller cracks in center region.The ablation mechanism of HfC coating has been changed by SiC nanowires.Thicker HfO2 fused layer was formed on the surface of the toughed HfC coating,which could provide efficient protection for C/C composites.Therefore,SiC nanowires toughed HfC coating behaved in better ablation resistance.
ISSN:1005-0302
1941-1162
DOI:10.1016/j.jmst.2014.03.024