Ablation-resistant carbide ZrTiCB for oxidizing environments up to 3,000 °C.

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ID: 50376
2017
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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 (ZrTiCB) 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.
Reference Key
zeng2017ablationresistantnature Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zeng, Yi;Wang, Dini;Xiong, Xiang;Zhang, Xun;Withers, Philip J;Sun, Wei;Smith, Matthew;Bai, Mingwen;Xiao, Ping;
Journal Nature communications
Year 2017
DOI
10.1038/ncomms15836
URL
Keywords
interface temperature microstructure alumina nano-indentation ti metallization

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