Interdiffusion in β Phase Field of Ternary (Ni, Ru)Al System

Bond coats play a vital role in multi-layered thermal barrier coatings (TBCs), commonly made of B2 (Ni, Pt)Al. However, the presence of platinum (Pt) makes the bond coats costly. To reduce the overall cost and enhance the working temperature of TBCs, Pt can be partially or completely replaced by ruthenium (Ru). For the development of Ru-based bond coats, understanding the interdiffusion behavior of (Ni, Ru)Al is essential. In the present work, the interdiffusion behavior in the single B2 phase of the ternary (Ni, Ru)Al system was studied at 1100 °C using the diffusion couple technique. Experimental concentration profiles were obtained using an Electron Probe Micro-Analyzer, which was further fitted and analyzed for interdiffusion fluxes by utilizing the Multi Diflux software. Kirkaldy's approach was employed to determine the interdiffusion coefficients in the ternary B2 (Ni, Ru)Al system.

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Publication Details

Journal
Defect and diffusion forum/Diffusion and defect data, solid state data. Part A, Defect and diffusion forum
Published
2025-02-20
DOI
https://doi.org/10.4028/p-72p0gi
Primary Topic
Intermetallics and Advanced Alloy Properties
Type
article
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0.00
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article

Interdiffusion in β Phase Field of Ternary (Ni, Ru)Al System

Kaustubh N. Kulkarni, Sachin Kumar
Defect and diffusion forum/Diffusion and defect data, solid state data. Part A, Defect and diffusion forum
Intermetallics and Advanced Alloy Properties
article

Interdiffusion in β Phase Field of Ternary (Ni, Ru)Al System

Kaustubh N. Kulkarni, Sachin Kumar
article en

Abstract

Bond coats play a vital role in multi-layered thermal barrier coatings (TBCs), commonly made of B2 (Ni, Pt)Al. However, the presence of platinum (Pt) makes the bond coats costly. To reduce the overall cost and enhance the working temperature of TBCs, Pt can be partially or completely replaced by ruthenium (Ru). For the development of Ru-based bond coats, understanding the interdiffusion behavior of (Ni, Ru)Al is essential. In the present work, the interdiffusion behavior in the single B2 phase of the ternary (Ni, Ru)Al system was studied at 1100 °C using the diffusion couple technique. Experimental concentration profiles were obtained using an Electron Probe Micro-Analyzer, which was further fitted and analyzed for interdiffusion fluxes by utilizing the Multi Diflux software. Kirkaldy's approach was employed to determine the interdiffusion coefficients in the ternary B2 (Ni, Ru)Al system.

Defect and diffusion forum/Diffusion and defect data, solid state data. Part A, Defect and diffusion forumVol. 439
Indian Institute of Technology Kanpur (IN)
Openalex Percentile: Top 97%
Intermetallics and Advanced Alloy Properties
DOIOpen Access PDFOpenAlex
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Interdiffusion in β Phase Field of Ternary (Ni, Ru)Al System — Kaustubh N. Kulkarni, Sachin Kumar · Defect and diffusion forum/Diffusion and defect data, solid state data. Part A, Defect and diffusion forum (2025) | TGRS Research Map | TGRS