Oxidation-induced rhenium evaporation in Ni-based single crystal superalloy thin lamella

被引：14

作者：

Chen, Yanhui ^{[1
]}

Zhang, Wenhan ^{[1
]}

Zhao, Yunsong ^{[2
]}

Zhai, Yadi ^{[1
]}

Zhang, Bin ^{[3
]}

Lu, Hui ^{[1
]}

Yang, Guo ^{[1
]}

Yang, Luyan ^{[1
]}

Li, Ang ^{[1
]}

机构：

[1] Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China

[2] Beijing Inst Aeronaut Mat, Sci & Technol Adv High Temp Struct Mat Lab, Beijing 100095, Peoples R China

[3] Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China

来源：

SCRIPTA MATERIALIA | 2021年 / 203卷

基金：

北京市自然科学基金;

关键词：

Superalloy; Oxidation; Rhenium; Interface segregation; Transmission electron microscopy; RE;

D O I：

10.1016/j.scriptamat.2021.114106

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Rhenium is the key element for improving the mechanical properties in gamma/gamma' structure single-crystal Nibased 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 gamma 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. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页数：5

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