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Microstructures and Properties of the C/Zr-O-Si-C Composites Fabricated by Polymer Infiltration and Pyrolysis

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Abstract

A way to improve the ablation properties of the C/SiC composites in an oxyacetylene torch environment was investigated by the precursor infiltration and pyrolysis route using three organic precursors (zirconium butoxide, polycarbosilane, and divinylbenzene). The ceramic matrix derived from the precursors at 1200 °C was mainly a mixture of SiC, ZrO2, and C. After annealing at 1600 °C for 1 h, ZrO2 partly transformed to ZrC because of the carbothermic reductions and completely transformed to ZrC at 1800 °C in 1 h. The mechanical properties of the composites decreased with increasing temperature, while the ablation resistance increased due to the increasing content of ZrC. Compared with C/SiC composites, the ablation resistance of the C/Zr-O-Si-C composites overwhelms because of the oxide films which formed on the ablation surfaces. And, the films were composed of two layers: the porous surface layer (the mixture of ZrO2 and SiO2) and the dense underlayer (SiO2).

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Acknowledgments

The authors would like to thank Ph.D. S. Wang for valuable discussions and the National Natural Science Foundation of China (90916002) for financial support.

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Authors and Affiliations

  1. Construction Engineering Research Institute, General Logistics Department of PLA, Xi’an, Shaanxi, 710032, People’s Republic of China

    Yan Ma

  2. College of Aerospace & Materials Engineering, National University of Defense Technology, Changsha, Hunan, 410073, People’s Republic of China

    Zhaohui Chen

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  1. Yan Ma
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  2. Zhaohui Chen
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Correspondence to Yan Ma.

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Ma, Y., Chen, Z. Microstructures and Properties of the C/Zr-O-Si-C Composites Fabricated by Polymer Infiltration and Pyrolysis. J. of Materi Eng and Perform 22, 2510–2514 (2013). https://doi.org/10.1007/s11665-013-0554-7

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  • DOI: https://doi.org/10.1007/s11665-013-0554-7

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