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<p>TiAl alloys were melted in BaZrO<sub>3</sub> crucibles without and with Y addition at 1550&#xa0;°C for 5, 10, and 15&#xa0;min, respectively. The effect of the melting time and Y addition on the interaction between the crucibles and the alloys was investigated. Results revealed that the interaction extent was intensified with the increasing melting time. However, it could be effectively suppressed by adding Y into the alloy due to the in situ generated Y<sub>2</sub>O<sub>3</sub> protection layer. The thickness of the interaction layer could be decreased from 95.6 to 25.1&#xa0;μm with Y addition at 1550&#xa0;°C for 15&#xa0;min. In addition, a significant deoxidation effect was achieved by adding Y, and the O concentration of the alloy was decreased from 0.2 to 0.0561&#xa0;wt.%. In comparison with Al<sub>2</sub>O<sub>3</sub>, MgO, CaO, and Y<sub>2</sub>O<sub>3</sub> crucibles, BaZrO<sub>3</sub> crucible combined with Y addition exhibited the lowest O contamination to the alloy melt.</p>

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In-situ constructed Y2O3 protective layer improving corrosion resistance of BaZrO3 crucible to TiAl alloy melt

  • 期刊论文

  • 发表日期：

    2025年8月11日

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  • Yi-xin Fu,
  • Man Zhang,
  • Zhe-yu Cai,
  • Hou-jin Liao,
  • Shao-wen Deng,
  • Xin-mei Hou,
  • Qi-sheng Feng,
  • En-hui Wang,
  • Peng-yue Gao,
  • Guang-yao Chen,
  • Chong-he Li

摘要

TiAl alloys were melted in BaZrO3 crucibles without and with Y addition at 1550 °C for 5, 10, and 15 min, respectively. The effect of the melting time and Y addition on the interaction between the crucibles and the alloys was investigated. Results revealed that the interaction extent was intensified with the increasing melting time. However, it could be effectively suppressed by adding Y into the alloy due to the in situ generated Y2O3 protection layer. The thickness of the interaction layer could be decreased from 95.6 to 25.1 μm with Y addition at 1550 °C for 15 min. In addition, a significant deoxidation effect was achieved by adding Y, and the O concentration of the alloy was decreased from 0.2 to 0.0561 wt.%. In comparison with Al2O3, MgO, CaO, and Y2O3 crucibles, BaZrO3 crucible combined with Y addition exhibited the lowest O contamination to the alloy melt.