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Ultra-fast densification of CNTs reinforced alumina based on combustion reaction and quick pressing

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Abstract

An ultra-fast densification method based on high heating rate from the combustion reaction for producing carbon nanotubes (CNTs) reinforced alumina ceramics is reported. The heat generated by combustion reaction is adopted to act as a high temperature source to the sample, which results in a heating rate of 1660°C/min of the sample. Then a great mechanical pressure is applied to the sample when the sample gets the expected temperature. The densification process is finished in several minutes. The results indicate that the densification method is beneficial to protect the CNTs from destruction and creates good interfacial combination between the nanotubes and the matrix. With the addition of 1 wt% CNTs, the fracture toughness of the ceramics prepared increases about 50%.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China

    ZhengYi Fu, LiWei Huang & JinYong Zhang

  2. Department of Materials, University of Oxford, Oxford, OXl 3PH, UK

    Richard Todd

Authors
  1. ZhengYi Fu
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  2. LiWei Huang
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  3. JinYong Zhang
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  4. Richard Todd
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Correspondence to ZhengYi Fu.

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Fu, Z., Huang, L., Zhang, J. et al. Ultra-fast densification of CNTs reinforced alumina based on combustion reaction and quick pressing. Sci. China Technol. Sci. 55, 484–489 (2012). https://doi.org/10.1007/s11431-011-4674-8

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  • DOI: https://doi.org/10.1007/s11431-011-4674-8

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