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Journal of Materials Science

, Volume 45, Issue 13, pp 3477–3482 | Cite as

Mechanical properties and oxidation behaviors of carbon/carbon composites with C–TaC–C multi-interlayer

  • Zhao-ke Chen
  • Xiang Xiong
  • Guo-dong Li
  • Ya-lei Wang
Article

Abstract

To improve the mechanical properties and oxidation-resistance properties, a C–TaC–C multi-interlayer structure was introduced in carbon/carbon (C/C) composites by chemical vapor infiltration. Compared with conventional C/C composites, a higher fracture toughness and strength have been achieved by using the C–TaC–C multi-interlayer. In addition, the composites also exhibit a higher preliminary oxidation temperature and a lower mass loss at high temperatures. The oxidation rate of the composites increases with temperature increasing in the range of 700–1300 °C, reaching a maximum value at 1300 °C, then decreases in 1300–1400 °C. A hexagonal structure of Ta2O5 phase is obtained when being oxidized at 700–800 °C, and it transforms to an orthorhombic phase at temperatures above 900 °C. The structures of C–TaC–C multi-interlayer are intact without cracks or porosities after being oxidized at 700–800 °C. In 900–1300 °C, the composites are oxidized uniformly with the formation of pores. At temperatures above 1300 °C, there are oxidation and non-oxidation regions with the oxidation process being controlled by diffusion.

Keywords

Carbon Fiber TaCl5 Flexural Strength High Fracture Toughness Chemical Vapor Infiltration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This research work is supported by National Natural Science Foundation of China under the Grant No. 50872154 and by Creative research group of National Natural Science Foundation of China under the Grant No. 50721003.

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Zhao-ke Chen
    • 1
  • Xiang Xiong
    • 1
  • Guo-dong Li
    • 1
  • Ya-lei Wang
    • 1
  1. 1.State Key Laboratory of Powder MetallurgyCentral South UniversityChangshaChina

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