Scholarlink

<p>Microstructures and phase constituents of alloys in the Al–Hf–Ta system were investigated. The liquidus projection of this system was constructed, and 12 primary solidification regions, fcc(Al), βAl<sub>3</sub>Hf, Al<sub>2</sub>Hf, Al<sub>3</sub>Ta, Al<sub>69</sub>Ta<sub>39</sub>, Al<sub>3</sub>Hf<sub>2</sub>, AlHf, Al<sub>3</sub>Hf<sub>4</sub>, <i>τ</i>, Al<sub>2</sub>Hf<sub>3</sub>, <i>σ</i>, and bcc(Hf, Ta) were identified. Fifteen and 14 three-phase equilibria were constructed at 1000&#xa0;°C and 1200&#xa0;°C, respectively. The maximum solubility of Ta in <i>β</i>Al<sub>3</sub>Hf, Al<sub>2</sub>Hf, AlHf, and <i>τ</i> was measured to be ∼ 5.5, ∼ 10.3, ∼ 16.9, and ∼ 20.2 at. pct at 1000&#xa0;°C and ∼ 6.2, ∼ 10.8, ∼ 18.9, and ∼ 21.9 at. pct at 1200&#xa0;°C, respectively. And the solubility of Hf in Al<sub>3</sub>Ta, Al<sub>69</sub>Ta<sub>39</sub>, <i>φ</i>, and <i>σ</i> was determined to be ∼ 7.3, ∼ 10.6, ∼ 6.0, and ∼ 39.3 at. pct at 1000&#xa0;°C and ∼ 7.5, ∼ 10.8, ∼ 6.4, and ∼ 40.5 at. pct at 1200&#xa0;°C, respectively. Finally, the thermodynamic parameters of each phase in the Al–Hf–Ta system were optimized using the CALPHAD method to obtain a set of self-consistent thermodynamic parameters.</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

Experimental Investigation and Thermodynamic Optimization of the Al–Hf–Ta System

  • 期刊论文

  • 发表日期：

    2025年9月25日

查看全文
  • Feikuo Chen,
  • Zeting Du,
  • Ya Liu,
  • Cuiping Guo

摘要

Microstructures and phase constituents of alloys in the Al–Hf–Ta system were investigated. The liquidus projection of this system was constructed, and 12 primary solidification regions, fcc(Al), βAl3Hf, Al2Hf, Al3Ta, Al69Ta39, Al3Hf2, AlHf, Al3Hf4, τ, Al2Hf3, σ, and bcc(Hf, Ta) were identified. Fifteen and 14 three-phase equilibria were constructed at 1000 °C and 1200 °C, respectively. The maximum solubility of Ta in βAl3Hf, Al2Hf, AlHf, and τ was measured to be ∼ 5.5, ∼ 10.3, ∼ 16.9, and ∼ 20.2 at. pct at 1000 °C and ∼ 6.2, ∼ 10.8, ∼ 18.9, and ∼ 21.9 at. pct at 1200 °C, respectively. And the solubility of Hf in Al3Ta, Al69Ta39, φ, and σ was determined to be ∼ 7.3, ∼ 10.6, ∼ 6.0, and ∼ 39.3 at. pct at 1000 °C and ∼ 7.5, ∼ 10.8, ∼ 6.4, and ∼ 40.5 at. pct at 1200 °C, respectively. Finally, the thermodynamic parameters of each phase in the Al–Hf–Ta system were optimized using the CALPHAD method to obtain a set of self-consistent thermodynamic parameters.