The synergy effect of elements on the oxidation resistance of a high-purity directionally solidification nickel-based superalloy

A study on the film characteristics of a Cr2O3-forming nickel-based superalloy is conducted. A triplex structure is observed, in which Ta–Ti layer is developed between the external Cr2O3 and inner Al2O3 layer. When the exposure time increased, Ti atoms are divorced from the Ta–Ti layer, filling the...

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Bibliographic Details
Published inJournal of materials research and technology Vol. 26; pp. 2796 - 2805
Main Authors Wang, Guanqin, Zhang, Jinming, Li, Yanzhao, Zhao, Debiao, Yang, Yongqi, Li, Qiang, Xie, Kai
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.2023
Elsevier
Subjects
Diffusion
Oxidation resistance
Superalloy
Voids
Voids
Superalloy
Oxidation resistance
Diffusion
Film
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Summary:A study on the film characteristics of a Cr2O3-forming nickel-based superalloy is conducted. A triplex structure is observed, in which Ta–Ti layer is developed between the external Cr2O3 and inner Al2O3 layer. When the exposure time increased, Ti atoms are divorced from the Ta–Ti layer, filling the voids inside the Cr2O3 layer, which improve the density of the external Cr2O3 layer and retard the inward penetration of the nitrogen. As a result, the degree of internal nitrides is reduced. Consequently, the synergy effect of Ta and Ti in the Cr2O3 forming alloy is beneficial to improve the oxidation resistance.
ISSN:2238-7854
DOI:10.1016/j.jmrt.2023.08.054