First‐principles study, fabrication, and characterization of (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)C high‐entropy ceramic

By Beilin Ye, T. Wen, Kehan Huang, Caizhuang Wang, Yanhui Chu. Journal of The American Ceramic Society, 2019

335 citations recorded by the source corpus.

The formation possibility of (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)C high‐entropy ceramic (HHC‐1) was first analyzed by the first‐principles calculations, and then, it was successfully fabricated by hot‐pressing sintering technique at 2073 K under a pressure of 30 MPa. The first‐principles calculation results showed that the mixing enthalpy and mixing entropy of HHC‐1 were −0.869 ± 0.290 kJ/mol and 0.805R, respectively. The experimental results showed that the as‐prepared HHC‐1 not only had an interesting single rock‐salt crystal structure of metal carbides but also possessed high compositional uniformity from nanoscale to microscale. By taking advantage of these unique features, it exhibited extremely high nanohardness of 40.6 ± 0.6 GPa and elastic modulus in the range from 514 ± 10 to 522 ± 10 GPa and relatively high electrical resistivity of 91 ± 1.3 μΩ·cm, which could be due to the presence of solid solution effects.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/ac73c7e2dc0032c91049e9e346b09a1d2fdb6b20

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Aerospace Engineering

  1. Jian Luo
  2. P. Hopkins
  3. Tyler J. Harrington
  4. Kenneth S. Vecchio
  5. Joshua Gild

In Mechanical Engineering

  1. Jian Luo
  2. Joshua Gild
  3. P. Hopkins
  4. Tyler J. Harrington
  5. Kenneth S. Vecchio

Citations in the corpus