Effects of Ni and Cr on the high-temperature oxidation behavior and mechanisms of Co- and CoNi-base superalloys
Effects of Ni and Cr on the high-temperature oxidation behavior and mechanisms of Co- and CoNi-base superalloys
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DOI：
10.1016/j.matdes.2022.111291
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发表时间：
2022-12
期刊：
影响因子：
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通讯作者：
Longjun Li;Li Wang;Zhida Liang;Junyang He;J. Qiu;F. Pyczak;Min Song
中科院分区：
文献类型：
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作者：
Longjun Li;Li Wang;Zhida Liang;Junyang He;J. Qiu;F. Pyczak;Min Song
通过900和1000 °C空气中等温氧化实验，研究了不同Ni和Cr含量的Co基和CoNi基合金的高温氧化行为。用电子显微镜详细研究了不同合金中氧化膜内三层的结构、组成和元素分布，特别是中间层中细小的氧化物颗粒。根据氧化膜的微观结构和相组成，借助CALPHAD计算，详细阐述了合金元素对氧化机理和抗氧化性的协同作用。
The high-temperature oxidation behaviors of Co- and CoNi-base alloys with different Ni and Cr additions were investigated by isothermal oxidation in air at 900 and 1000 °C. The structure, composition, and element distribution in the three layers within the oxide scales in different alloys have been explored in detail by electron microscopy, especially with regard to the fine oxide particles in the intermediate layer. Based on the microstructure and phase constitution of the oxide scales, the synergetic effects of alloying elements on the oxidation mechanisms and resistance have been elucidated in detail with the aid of CALPHAD calculation.