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Title: SEM/TEM investigation of aluminide coating Co-doped with Pt and Hf deposited on Inconel 625
Authors: Morgiel, Jerzy
Zagula-Yavorska, Maryana
Zubko, Maciej
Romanowska, Jolanta
Keywords: Aluminide coating; Hafnium; Inconel 625; Platinum; Transmission electron microscopy (TEM)
Issue Date: 2018
Citation: Materials, Vol. 11, iss. 6 (2018), Art. no. 898
Abstract: 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.
DOI: 10.3390/ma11060898
ISSN: 1996-1944
Appears in Collections:Artykuły (WINOM)

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