Scholarlink

<p>This study conducts an in-depth investigation into the oxidation mechanisms of the AlCrMoNbTi high-entropy alloy at 1000&#xa0;°C and 1200&#xa0;°C, using experimental and multiscale characterization techniques. At 1200 ℃, the alloy exhibited parabolic oxidation kinetics with an oxidation constant of 3.32&#xa0;mg·cm<sup>-2</sup>∙h<sup>-1</sup>, which was a 57.4% improvement over similar Zr-containing high-entropy alloys. The protection performance can be attributed to the formation of stable CrNbO<sub>4</sub> and Nb<sub>2</sub>O<sub>5</sub>, along with Al<sub>2</sub>O<sub>3</sub> filling. In contrast, at 1000 ℃, the oxide scale consists of a layered structure accompanied by Nb<sub>2</sub>O<sub>5</sub> polymorphism and MoO<sub>3</sub> volatility, promoting oxidation kinetics from parabolic to linear and reducing oxidation resistance.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Oxidation Behavior of AlCrMoNbTi high-entropy Alloy at 1000 °C and 1200 °C

  • 期刊论文

  • 发表日期：

    2025年11月6日

查看全文
  • Jingyi Gao,
  • Xiangsheng Hong,
  • Jinpeng Zhang,
  • Mengtian Liang,
  • Dongdong Xiong,
  • Yi Yang

摘要

This study conducts an in-depth investigation into the oxidation mechanisms of the AlCrMoNbTi high-entropy alloy at 1000 °C and 1200 °C, using experimental and multiscale characterization techniques. At 1200 ℃, the alloy exhibited parabolic oxidation kinetics with an oxidation constant of 3.32 mg·cm-2∙h-1, which was a 57.4% improvement over similar Zr-containing high-entropy alloys. The protection performance can be attributed to the formation of stable CrNbO4 and Nb2O5, along with Al2O3 filling. In contrast, at 1000 ℃, the oxide scale consists of a layered structure accompanied by Nb2O5 polymorphism and MoO3 volatility, promoting oxidation kinetics from parabolic to linear and reducing oxidation resistance.

Graphical Abstract