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Journal of Advanced Ceramics

, Volume 7, Issue 3, pp 276–288 | Cite as

Enhanced thermal shock and oxidation resistance of Si2BC3N ceramics through MWCNTs incorporation

  • Ning Liao
  • Dechang Jia
  • Zhihua Yang
  • Yu Zhou
  • Yawei Li
Open Access
Research Article
  • 51 Downloads

Abstract

Multi-walled carbon nanotubes (MWCNTs) reinforced Si2BC3N ceramics were prepared through mechanical alloying (MA) and following spark plasma sintering (SPS). The thermal shock resistance of Si2BC3N ceramics was evaluated comparatively through ice water quenching test and theoretical prediction. Furthermore, the oxidation resistance of MWCNTs incorporated Si2BC3N ceramics was evaluated under high temperature. The results show that the calculated parameters such as the critical thermal shock temperature (R) and the thermal stresses resistance (Rst), as well as the toughness (R″″) are improved with addition of 1 vol% MWCNTs. In addition, the crack propagation resistance of 1 vol% MWCNTs incorporated Si2BC3N ceramics is obviously improved through generating more tortuous crack propagation paths attributing to the “crack bridging”, “pull-out”, and “crack deflection” mechanisms of MWCNTs. Therefore, the residual strengths of 1 vol% MWCNTs containing specimens remained the highest after the thermal shock tests. Besides, the present work also reveals that the oxidation resistance is more sensitive to relative density than MWCNTs addition.

Keywords

Si2BC3N ceramics MWCNTs thermal shock resistance oxidation resistance 

Notes

Acknowledgements

This work was supported financially by National Natural Science Foundation of China (NSFC, Grant Nos. 51702065 and 51621091).

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  1. 1.Institute for Advanced Ceramics, School of Materials Science and EngineeringHarbin Institute of TechnologyHarbinChina
  2. 2.Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing TechnologyMinistry of Industry and Information TechnologyWuhanChina
  3. 3.State Key Laboratory of Refractories and MetallurgyWuhan University of Science and TechnologyWuhanChina
  4. 4.National–provincial Joint Engineering Research Center of High Temperature Materials and Lining TechnologyWuhanChina

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