Interfacial oxidation of hafnium modified NiAl alloys

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

View graph of relations

Author(s)

  • Hailing Zhang
  • Xinli Wang
  • Dingding Zhu
  • Jun Zhao
  • Tingting Yang
  • Yichun Zhou
  • Canying Cai
  • Jianyu Huang
  • Guangwen Zhou

Detail(s)

Original languageEnglish
Article number109604
Journal / PublicationCorrosion Science
Volume189
Online published2 Jun 2021
Publication statusPublished - 15 Aug 2021

Abstract

The high-temperature oxidation of Hf-modified NiAl alloy at 950 °C results in the formation of γ-Al2O3 and θ-Al2O3. Exclusive formation of HfO2 particles is observed at the adherent γ-Al2O3/NiAl interface. By contrast, the θ-Al2O3/NiAl interface oxidation results in multi-layered oxide growth consisting of alternate thin and thick layers of θ-Al2O3 and NiAl2O4 along with dispersed HfO2 particles in the oxide layers. This difference is elucidated by first-principle calculations showing that the θ-Al2O3 lattice is more favorable than γ-Al2O3 to host Hf and Ni atoms, thereby resulting in the growth of mixed oxides at the θ-Al2O3/NiAl interface.

Research Area(s)

  • Hafnium, Interfacial oxidation, NiAl, Reactive element, Transmission electron microscopy

Citation Format(s)

Interfacial oxidation of hafnium modified NiAl alloys. / Zhang, Hailing; Wang, Xinli; Zhu, Dingding; Zhao, Jun; Yang, Tingting; Zhou, Yichun; Lu, Jian; Cai, Canying; Huang, Jianyu; Zhou, Guangwen.

In: Corrosion Science, Vol. 189, 109604, 15.08.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review