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Thermal properties of Inconel 625-NbC metal matrix composites (MMC)

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Title: Thermal properties of Inconel 625-NbC metal matrix composites (MMC)
Authors: Grabos, Adrian Browse this author
Rutkowski, Pawel Browse this author
Huebner, Jan Browse this author
Nieroda, Pawel Browse this author
Kata, Dariusz Browse this author
Hayashi, Shigenari Browse this author →KAKEN DB
Keywords: Metal-matrix composites (MMCs)
Thermal properties
Physical methods of analysis
Issue Date: Dec-2022
Publisher: Elsevier
Journal Title: Materials & design
Volume: 224
Start Page: 111399
Publisher DOI: 10.1016/j.matdes.2022.111399
Abstract: Inconel 625-NbC Metal Matrix Composite (MMC) is an emergent material of Inconel 625-carbide composites. It is characterized by dense microstructure, improved hardness, and preserved passive Cr-rich layer formation during oxidation. In this study, its thermal properties were investigated. Inconel 625-NbC composites and Inconel 625 reference alloy were consolidated by Spark Plasma Sintering (SPS). Their microstructure, phase composition, Coefficient of Thermal Expansion (CTE), thermal diffusivity (alpha), thermal conductivity (lambda), and specific heat (c(p)) were studied. The addition of NbC into Inconel 625 matrix did not significantly affect the CTE or lambda of the final composite. Thermal conductivity of Inconel 625-NbC was initially lower than 625 superalloy but was increasing faster in function of temperature. c(p )functions of SPS-ed 625 alloy and composites had different slopes in comparison to literature. The influence of hot rolling, part of Inconel 625-NbC obtaining SPS technology, was also studied. It affected composites c(p).
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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