The effect of Ta on the oxidation resistance of the alloys Ta_x-(Mo-Cr-Ti-Al)_1−x (x=0; 5; 10; 15; 20 at%) in air at 1200 °C was examined. The oxidation behavior improves continuously with the increasing Ta concentration. Alloys with Ta concentrations Ta≤10 at% exhibit poor oxidation. Severe evaporation of MoO₃ occurred which was quantitatively estimated. The evaporation of MoO₃ is drastically reduced in alloys with the higher Ta concentrations. At 15 and 20 at% Ta, protective CrTaO₄ scales are found. The CrTaO₄ scale formed on Ta₂₀-(Mo-Cr-Ti-Al)₈₀ grows according to the parabolic rate law as a result of oxygen inward diffusion.

检验了 Ta 对合金 Ta _x -(Mo-Cr-Ti-Al) _1-x (x=0; 5; 10; 15; 20 at%) 在 1200 °C 空气中的抗氧化性的影响。随着Ta浓度的增加，氧化行为不断改善。Ta 浓度 Ta≤10 at% 的合金表现出较差的氧化性。发生了定量估计的 MoO _{3 的}严重蒸发。在具有较高 Ta 浓度的合金中，MoO ₃的蒸发急剧减少。在 15 和 20 at% Ta 时，发现了保护性 CrTaO ₄鳞片。由于氧向内扩散，在Ta ₂₀ -(Mo-Cr-Ti-Al) ₈₀上形成的CrTaO ₄鳞片根据抛物线速率定律生长。