Oxidation resistance and mechanical properties of HfC nanowire-toughened ultra-high temperature ceramic coating for SiC-coated C/C composites

Oxidation resistance and mechanical properties of HfC nanowire-toughened ultra-high temperature... Article history: To improve the oxidation resistance of carbon/carbon (C/C) composites, a dense HfC nanowire-toughened Received 14 August 2015 ultra-high temperature ceramic multiphase coating was prepared on SiC-coated C/C composites by Received in revised form 9 November 2015 chemical vapor deposition (CVD) and pack cementation. The microstructure, mechanical and oxidation Accepted 9 November 2015 resistance properties of the coating were investigated. The results show that the HfC nanowires in the Available online 14 November 2015 coating could suppress the cracking of the coating and then improve the toughness of the coating. The flexural property, thermal shock and isothermal oxidation resistance of the coating were all improved Keywords: due to the incorporation of HfC nanowires. Carbon/carbon composite © 2015 Elsevier B.V. All rights reserved. Ultra-high temperature ceramic coating HfC nanowires Mechanical property Oxidation resistance 1. Introduction UHTCs coatings is much higher than that of SiC inner coating, which will result in the cracking of the outer coatings [13]. Owing to the outstanding mechanical properties of car- To relieve the mismatch of CET between coating and substrate bon/carbon (C/C) composites at high temperatures, such as or outer coating and inner coating, SiC whiskers [14], SiC nanopar- high thermal conductivity, good thermal http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Oxidation resistance and mechanical properties of HfC nanowire-toughened ultra-high temperature ceramic coating for SiC-coated C/C composites

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2015.11.097
Publisher site
See Article on Publisher Site

Abstract

Article history: To improve the oxidation resistance of carbon/carbon (C/C) composites, a dense HfC nanowire-toughened Received 14 August 2015 ultra-high temperature ceramic multiphase coating was prepared on SiC-coated C/C composites by Received in revised form 9 November 2015 chemical vapor deposition (CVD) and pack cementation. The microstructure, mechanical and oxidation Accepted 9 November 2015 resistance properties of the coating were investigated. The results show that the HfC nanowires in the Available online 14 November 2015 coating could suppress the cracking of the coating and then improve the toughness of the coating. The flexural property, thermal shock and isothermal oxidation resistance of the coating were all improved Keywords: due to the incorporation of HfC nanowires. Carbon/carbon composite © 2015 Elsevier B.V. All rights reserved. Ultra-high temperature ceramic coating HfC nanowires Mechanical property Oxidation resistance 1. Introduction UHTCs coatings is much higher than that of SiC inner coating, which will result in the cracking of the outer coatings [13]. Owing to the outstanding mechanical properties of car- To relieve the mismatch of CET between coating and substrate bon/carbon (C/C) composites at high temperatures, such as or outer coating and inner coating, SiC whiskers [14], SiC nanopar- high thermal conductivity, good thermal

Journal

Applied Surface ScienceElsevier

Published: Jan 1, 2016

References

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