The TEM analysis of the (TiZrVNb)C0.8 sintered at 2400 ℃. The lattice parameter and formation energy of the (TiZrVNb)Cx with different carbon content. (IMAGE)

Tsinghua University Press

The TEM analysis of the (TiZrVNb)C0.8 sintered at 2400 ℃. The lattice parameter and formation energy of the (TiZrVNb)Cx with different carbon content.

Caption

The TEM analysis of the (TiZrVNb)C0.8 sintered at 2400 ℃. The lattice parameter and formation energy of the (TiZrVNb)Cx with different carbon content. Ashby plot showing the Vickers hardness vs. flexural strength relationship for a comparative study between the samples in this work and other single-phase high entropy carbide ceramics from previous study. The semi-coherent orientation relationship between the decomposed structures of the Zr-poor phase and Zr-rich phase and the element distribution can be determined by the TEM analysis. The reduction of carbon content can influence the thermodynamic stability of (TiZrVNb)C system significantly. The ceramics with phase decomposition structures have apparent advantages compared to single-phase high-entropy carbides.

Credit

Associate Professor Lei Chen, School of Materials Science and Engineering, Harbin Institute of Technology

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