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Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al
Joint Authors
Gonzalez-Rodriguez, J. G.
Ramos-Hernandez, J. J.
Porcayo-Calderon, J.
Martinez-Gomez, L.
Mayén, Jan
Lara-Rodriguez, G.
Salinas-Bravo, V. M.
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-19, 19 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-01-17
Country of Publication
Egypt
No. of Pages
19
Abstract EN
This paper discusses the effect of the addition of noble metals on the microstructure, mechanism, and oxidation kinetics of the Ni3Al intermetallic alloy.
Ni3Al was doped with 1% (atomic percent) of Au, Ag, Pd, and Pt.
Oxidation behavior of the alloys was evaluated at 900, 1000, and 1100°C in O2 for 24 hours.
XRD analysis showed that the addition of noble metals favored the oxide growth on preferential crystallographic planes.
In addition, the preferential substitution of the noble metals in the Ni3Al structure modifies the surface composition by increasing the Al/Ni ratio.
It was observed that most of the alloys showed a subparabolic behavior, and only the intermetallic base and the alloy doped with Ag show a parabolic behavior at 900°C.
The developed oxides were analyzed both superficially and in cross section by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDXA).
It was evident that only the intermetallic base showed the formation of a duplex oxide scale (Al2O3/NiO).
The alloys doped with noble metals showed the oxide growth practically of pure Al2O3.
This was due to a decrease in the diffusion of the Ni cations because of the presence of the noble metals in the crystalline structure.
American Psychological Association (APA)
Ramos-Hernandez, J. J.& Porcayo-Calderon, J.& Gonzalez-Rodriguez, J. G.& Mayén, Jan& Lara-Rodriguez, G.& Salinas-Bravo, V. M.…[et al.]. 2018. Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-19.
https://search.emarefa.net/detail/BIM-1119761
Modern Language Association (MLA)
Ramos-Hernandez, J. J.…[et al.]. Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-19.
https://search.emarefa.net/detail/BIM-1119761
American Medical Association (AMA)
Ramos-Hernandez, J. J.& Porcayo-Calderon, J.& Gonzalez-Rodriguez, J. G.& Mayén, Jan& Lara-Rodriguez, G.& Salinas-Bravo, V. M.…[et al.]. Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-19.
https://search.emarefa.net/detail/BIM-1119761
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1119761