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Open AccessArticle

SEM/TEM Investigation of Aluminide Coating Co-Doped with Pt and Hf Deposited on Inconel 625

1
Institute of Metallurgy and Materials Sciences, PAS, Reymonta 25 st., 30-059 Kraków, Poland
2
Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland
3
Institute of Materials Science, University of Silesia, Pułku Piechoty 1a st., 41-500 Chorzów, Poland
*
Author to whom correspondence should be addressed.
Materials 2018, 11(6), 898; https://doi.org/10.3390/ma11060898
Received: 23 April 2018 / Revised: 24 May 2018 / Accepted: 24 May 2018 / Published: 27 May 2018
(This article belongs to the Section Structure Analysis and Characterization)
The effect of simultaneous introduction of Hf and Pt into aluminide coating deposited on Inconel 625 alloy was investigated using scanning and transmission electron microscopy (SEM/TEM) methods. The coating consisted of two layers: the additive and the interdiffusion. The additive layer and part of the interdiffusion layer consist of the β-NiAl type phase. The middle part of the interdiffusion layer comprised an interpenetrating finger-like structure formed by the β-NiAl and TCP—σ type phases with numerous fine Cr precipitates in the former and occasional larger precipitates of NbC carbides interspersed in between them. The σ type phase inclusions are situated at the border between the substrate and the interdiffusion layer. The experiment showed that platinum fully dissolves in the β-NiAl-type matrix, while most of the introduced hafnium accumulates in HfO2 dioxide precipitates located close to the additive/interdifusion interface. View Full-Text
Keywords: aluminide coating; hafnium; platinum; Inconel 625; transmission electron microscopy (TEM) aluminide coating; hafnium; platinum; Inconel 625; transmission electron microscopy (TEM)
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MDPI and ACS Style

Morgiel, J.; Zagula-Yavorska, M.; Zubko, M.; Romanowska, J. SEM/TEM Investigation of Aluminide Coating Co-Doped with Pt and Hf Deposited on Inconel 625. Materials 2018, 11, 898.

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