Y/Hf-doped AlCoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance

Jie Lu, Ying Chen, Han Zhang, Na Ni, Ling Li, Limin He, Rende Mu, Xiaofeng Zhao, Fangwei Guo

Research output: Contribution to journalArticlepeer-review

162 Downloads (Pure)


In this study, we report a type of ultra oxidation and spallation resistant Y/Hf-doped AlCoCrFeNi high-entropy alloy (HEA). The alloy exhibits a significantly lower oxidation rate at 1100 ℃ with a kp value of about 1.9×10-13 g2 cm-4s-1, which is one magnitude lower than those of the conventional NiCoCrAlY alloys. Additionally, the alloy shows a strong resistance to the oxide scale spallation. The superior oxidation performance for the Y/Hf-doped HEA can be attributed to the fast establishment of exclusive α-Al2O3 scale, the beneficial reactive element effect and the large columnar grain size (width) in the oxide scale.
Original languageEnglish
Article number108426
JournalCorrosion Science
Early online date2 Jan 2020
Publication statusPublished - 2020


  • Alumina
  • High temperature
  • High-entropy alloy
  • Oxidation
  • Spallation


Dive into the research topics of 'Y/Hf-doped AlCoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance'. Together they form a unique fingerprint.

Cite this