Oxidation behavior of a Ti16.7Zr16.7Hf16.7Cu16.7Ni16.7Be16.7 high-entropy bulk metallic glass

Mao Zhang, Pan Gong, Ning Li, Guangping Zheng, Lei Deng, Junsong Jin, Qiaomin Li, Xinyun Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

In this study, the oxidation behavior of a supercooled Ti16.7Zr16.7Hf16.7Cu16.7Ni16.7Be16.7 HE-BMG was investigated. The mass gain of specimens during oxidation is very limited, and the maximum value is lower than 0.08 × 10−2 g/cm2 after two hours of insulation. With the insulation duration prolonging, the mass gain decreases, indicating that the oxides formed are not stable and could decompose after long-term heating. Meanwhile, the oxidation kinetics doesn't follow the parabolic rate law, indicating that it is not a diffusion-controlled process. Even for specimens oxidized at 713 K for 120 min, they are still fully amorphous. No surface precipitates, as well as continuous oxide scale structures, are formed even after oxidation for 120 min at 753 K. Therefore, it is indicated that this HE-BMG has strong thermal stability and oxidation resistance, which is much promising for thermoplastic forming.

Original languageEnglish
Pages (from-to)135-138
Number of pages4
JournalMaterials Letters
Volume236
DOIs
Publication statusPublished - 1 Feb 2019

Keywords

  • Amorphous materials
  • Diffusion
  • High entropy
  • Mass gain
  • Oxidation
  • Thermal stability

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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