Study of γ/γ′ Interfaces in Nickel-Based, Single-Crystal Superalloys by Scanning Transmission Electron Microscopy

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Study of γ/γ′ Interfaces in Nickel-Based, Single-Crystal Superalloys by Scanning Transmission Electron Microscopy

机译：扫描电子显微镜研究镍基单晶高温合金中γ/γ′界面

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The interfaces of γ/γ′ in crept Re-bearing, single-crystal, nickel-based superalloys have been studied by scanning transmission electron microscopy. Elements Ni and Ta are congregated at the γ′ side, ahead of the Re enrichment near interfaces, which shows the retarding effect on element diffusion during creep by Re enrichment. A growth step exists at the γ/γ′ interfaces with the apex of kinks congregated with heavy atoms, which may slow down interface displacement during creep.

机译：通过扫描透射电子显微镜研究了蠕变的重轴承，单晶，镍基高温合金中γ/γ'的界面。元素Ni和Ta在界面附近的Re富集之前在γ'侧聚集，这表明通过Re富集对蠕变过程中元素扩散的阻滞作用。在γ/γ'界面处存在一个增长步骤，其中的纽结顶端聚集有重原子，这可能会减缓蠕变过程中的界面位移。

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《Metallurgical and Materials Transactions A》 |2011年第3期|p.548-552|共5页
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Study of γ/γ′ Interfaces in Nickel-Based, Single-Crystal Superalloys by Scanning Transmission Electron Microscopy

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