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Erschienen in:
Effects of Internal Oxidation Methods on Microstructures and Properties of Al2O3 Dispersion-Strengthened Copper Alloys Kapitel lesen Erstes Kapitel lesen

2018 | OriginalPaper | Buchkapitel

Effects of Ce and Dy on the Cyclic Oxidation Behavior of a Ni-Based Single Crystal Superalloy

verfasst von : Jieying Bai, Jianhao Wu, Shuhua Xu, Yanling Pei, Lu Qin, Shusuo Li, Shengkai Gong

Erschienen in: High Performance Structural Materials

Verlag: Springer Singapore

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Abstract

To understand the role of rare earth elements in influencing high-temperature oxidation behavior of the Ni-based single crystal superalloy, a high Mo-containing nickel-based single crystal superalloy and the derivative alloy modified by Ce and Dy were designed. The results of oxidation tests conducted at 1100 °C indicated that doping 0.022 wt% Ce or 0.042 wt% Dy significantly improved the oxidation resistance of the alloy by reducing the oxide scale growth rate and enhancing the scale adhesion. The positive effects are probably because the doped trace of Dy or Ce can combine with O2− more quickly and reduce the oxygen contents on the oxide surface which decreases the oxidation rate. At the same time, it decreases the thickness of oxide scale which results in the reduction of the elastic strain energy and the weaker tendency to spallation of the oxide scale. But too high concentration of Dy or Ce was deleterious because its high oxidation rate results in much more defects which induce cracks easily.

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Vorheriges Kapitel Effect of Solution Treatment on Microstructure and Properties of GH3625 Alloy Tubes in Different States
Nächstes Kapitel Tensile Fracture Characteristics Along Different Directions of Laminated Ti-TiBw/Ti Composites with Two-Scale Hierarchical Structures Fabricated by Reaction Hot Pressing
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Metadaten
Titel
Effects of Ce and Dy on the Cyclic Oxidation Behavior of a Ni-Based Single Crystal Superalloy
verfasst von
Jieying Bai
Jianhao Wu
Shuhua Xu
Yanling Pei
Lu Qin
Shusuo Li
Shengkai Gong
Copyright-Jahr
2018
Verlag
Springer Singapore
Buch
High Performance Structural Materials

Print ISBN: 978-981-13-0103-2

Electronic ISBN: 978-981-13-0104-9

Copyright-Jahr: 2018

DOI
https://doi.org/10.1007/978-981-13-0104-9_85

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