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Ablation-resistant carbide Zr0.8Ti0.2C0.74B0.26 for oxidizing environments up to 3,000 °C

Author

Listed:
  • Yi Zeng

    (State Key Laboratory of Powder Metallurgy, Central South University
    School of Materials, University of Manchester)

  • Dini Wang

    (State Key Laboratory of Powder Metallurgy, Central South University)

  • Xiang Xiong

    (State Key Laboratory of Powder Metallurgy, Central South University)

  • Xun Zhang

    (School of Materials, University of Manchester)

  • Philip J. Withers

    (School of Materials, University of Manchester)

  • Wei Sun

    (State Key Laboratory of Powder Metallurgy, Central South University)

  • Matthew Smith

    (School of Materials, University of Manchester)

  • Mingwen Bai

    (School of Materials, University of Manchester)

  • Ping Xiao

    (School of Materials, University of Manchester)

Abstract

Ultra-high temperature ceramics are desirable for applications in the hypersonic vehicle, rockets, re-entry spacecraft and defence sectors, but few materials can currently satisfy the associated high temperature ablation requirements. Here we design and fabricate a carbide (Zr0.8Ti0.2C0.74B0.26) coating by reactive melt infiltration and pack cementation onto a C/C composite. It displays superior ablation resistance at temperatures from 2,000–3,000 °C, compared to existing ultra-high temperature ceramics (for example, a rate of material loss over 12 times better than conventional zirconium carbide at 2,500 °C). The carbide is a substitutional solid solution of Zr–Ti containing carbon vacancies that are randomly occupied by boron atoms. The sealing ability of the ceramic’s oxides, slow oxygen diffusion and a dense and gradient distribution of ceramic result in much slower loss of protective oxide layers formed during ablation than other ceramic systems, leading to the superior ablation resistance.

Suggested Citation

  • Yi Zeng & Dini Wang & Xiang Xiong & Xun Zhang & Philip J. Withers & Wei Sun & Matthew Smith & Mingwen Bai & Ping Xiao, 2017. "Ablation-resistant carbide Zr0.8Ti0.2C0.74B0.26 for oxidizing environments up to 3,000 °C," Nature Communications, Nature, vol. 8(1), pages 1-9, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15836
    DOI: 10.1038/ncomms15836
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