The oxidation and hot corrosion behaviors of the NiCrAlY, NiAlY, and Ni–xTa–Al–Y alloys (x = 1, 3, 5, and 10 wt%) were investigated at 750°C. The doped Ta promoted the formation of the protective α-Al₂O₃ scales. The NiTaAlY alloys exhibited an improved oxidation resistance compared with the NiAlY alloy. Under the NaCl-induced hot corrosion test, the addition of Ta reduced the consumption of Al and inhibited the internal corrosion of the alloys. The Ni–xTa–Al–Y alloys (x = 1, 3, 5, and 10 wt%) showed better resistance to the NaCl-induced hot corrosion. Moreover, the hot corrosion mechanism of the tested alloys was also discussed.

中文翻译：

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提高掺钽 NiAlY 合金在 750°C 下的抗氧化性和抗热腐蚀性能

研究了 NiCrAlY、NiAlY 和 Ni - x Ta-Al-Y 合金（x  = 1、3、5 和 10 wt%）在 750°C 下的氧化和热腐蚀行为。掺杂的Ta促进了保护性α-Al ₂ O ₃鳞片的形成。与 NiAlY 合金相比，NiTaAlY 合金表现出更好的抗氧化性。在NaCl诱导的热腐蚀试验中，Ta的加入减少了Al的消耗，抑制了合金的内腐蚀。Ni - x Ta-Al-Y 合金（x  = 1、3、5 和 10 wt%）对 NaCl 引起的热腐蚀具有更好的抵抗力。此外，还讨论了测试合金的热腐蚀机理。