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Erschienen in:

2020 | OriginalPaper | Buchkapitel

Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy

verfasst von : Kyoko Kawagishi, Chihiro Tabata, Takuya Sugiyama, Tadaharu Yokokawa, Jun Uzuhashi, Tadakatsu Ohkubo, Yuji Takata, Michinari Yuyama, Shinsuke Suzuki, Hiroshi Harada

Erschienen in: Superalloys 2020

Verlag: Springer International Publishing

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Abstract

It is known that a single-crystal Ni-base superalloy containing a trace amount of sulfur has reduced high-temperature oxidation resistance. Our previous study has shown that melting of Ni-base superalloys in a CaO crucible can eliminate the effect of sulfur on oxidation resistance, but the mechanism was not completely clear. In this study, we finally succeeded in detecting the segregation of sulfur at the oxide/substrate interface of 6th generation single-crystal superalloys using STEM-EDS analysis and confirmed that segregation could be suppressed by melting in the CaO crucible. As a result, it was found that melting in the CaO crucible can improve the oxidation resistance while maintaining the creep characteristics of sixth-generation single-crystal Ni-base superalloy.

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Vorheriges Kapitel Laboratory-Scale Replication of Deposit-Induced Degradation of High-Temperature Turbine Components

Nächstes Kapitel Development of a New Coating Compatible with Third-Generation Nickel-Based Superalloys and Thermal Barrier Coatings

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Titel: Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy
verfasst von: Kyoko Kawagishi
Chihiro Tabata
Takuya Sugiyama
Tadaharu Yokokawa
Jun Uzuhashi
Tadakatsu Ohkubo
Yuji Takata
Michinari Yuyama
Shinsuke Suzuki
Hiroshi Harada
Verlag: Springer International Publishing
Buch: Superalloys 2020
Print ISBN: 978-3-030-51833-2

Electronic ISBN: 978-3-030-51834-9

Copyright-Jahr: 2020
DOI: https://doi.org/10.1007/978-3-030-51834-9_78

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