Oxidation-Induced Rhenium Evaporation in Ni-Based Single Crystal Superalloy Thin Lamella

Yanhui Chen, Wenhan H. Zhang, Y. Zhao, Yadi Zhai, Bin Zhang, Hui Lu, Guo Yang, Luyan Yang, Ang Li
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引用次数: 6

Abstract

Abstract Rhenium is the key element for improving the mechanical properties in γ/γ' structure single-crystal Ni-based superalloys, but its oxidation-induced evaporation results in a detrimental decrease in corrosion resistance. The in situ Re evaporation process of a single lamella of a high Re-containing Ni-based superalloy is recorded in an environmental transmission electron microscope. The local aggregation of Re in the inner border of the γ phase and subsequent evaporation forms channels for the accelerated oxidation of the base and other elements. The real oxidation process of Re evaporation provides detailed and essential information on corrosive gas resistance properties at the nanoscale.
ni基单晶高温合金薄片氧化诱导铼蒸发
摘要铼是提高γ/γ′结构单晶镍基高温合金力学性能的关键元素,但铼的氧化诱发蒸发导致合金的耐蚀性下降。用环境透射电镜记录了高含Re镍基高温合金单片层的原位Re蒸发过程。Re在γ相内边界的局部聚集和随后的蒸发形成了碱和其他元素加速氧化的通道。Re蒸发的真实氧化过程提供了纳米级耐腐蚀性气体性能的详细和必要信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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