Work

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

Year: 2025

Type: article

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.

Source: Defect and diffusion forum/Diffusion and defect data, solid state data. Part A, Defect and diffusion forum

DOI: 10.4028/p-72p0gi

Authors: Sachin Kumar, Kaustubh N. Kulkarni

Institution: Indian Institute of Technology Kanpur

Language: English

Topic: Intermetallics and Advanced Alloy Properties

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4407796738

FWCI:

Cites: 22

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Related to: 10