Abstract Oxidation behavior (at 1000 °C for 10 h) of 1.0 wt% oxide dispersion-strengthened (nano-Y 2 O 3 , Al 2 O 3 , La 2 O 3 dispersed) mechanically alloyed (10 h) and sintered (1400 °C, 1500 °C, 2 h) W–Ni alloys has been investigated. Oxidation significantly constrains the application window of W and therefore needs to be counteracted by suitable alloying and dispersion. W–Ni–Y 2 O 3 alloy possesses excellent oxidation resistance at the high sintering temperatures. Moreover, W–Ni–Al 2 O 3 sintered at 1400 °C exhibited no spallation or blistering after 10 h of oxidation. The enhanced oxidation resistance of W–Ni–Y 2 O 3 alloy is attributed to superior densification, oxide-scale adhesion with the matrix phase, reduced volatilization of WO 3 owing to NiWO 4 and enhanced concentration of Y ions enriched with oxide. The investigation will provide a strategy to fabricate oxidation-resistant alloys by oxide dispersion for high-temperature applications. Graphic Abstract

中文翻译：

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氧化物弥散强化 W-Ni 合金的氧化行为

摘要 1.0 wt% 氧化物弥散强化（纳米 Y 2 O 3 、Al 2 O 3 、La 2 O 3 弥散）机械合金化（10 小时）和烧结（1400°）的氧化行为（在 1000 °C 下 10 小时） C, 1500 °C, 2 h) W-Ni 合金已被研究。氧化显着限制了 W 的应用窗口，因此需要通过适当的合金化和分散来抵消。W-Ni-Y 2 O 3 合金在高烧结温度下具有优异的抗氧化性。此外，在 1400 °C 下烧结的 W-Ni-Al 2 O 3 在氧化 10 小时后没有出现散裂或起泡。W-Ni-Y 2 O 3 合金增强的抗氧化性归因于优异的致密化、与基体相的氧化皮粘附、NiWO 4 导致的WO 3 挥发减少以及富含氧化物的Y 离子浓度的提高。该研究将为通过氧化物分散制造用于高温应用的抗氧化合金提供一种策略。图形摘要