Effect of Pt on diffusion-controlled growth characteristics of interdiffusion zone between CM247LC superalloy and Ni(Pt)Al bond coat

Bansal, U and Srivastava, A and Esakkiraja, N and Tamilselvi, M and Paul, A (2023) Effect of Pt on diffusion-controlled growth characteristics of interdiffusion zone between CM247LC superalloy and Ni(Pt)Al bond coat. In: Journal of Materials Science, 58 (3). pp. 1305-1314.

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Abstract

Diffusion-controlled growth of interdiffusion zone between CM247LC directionally solidified superalloy and platinum-containing nickel aluminide bond coat is studied. The growth mechanism of the interdiffusion zone is explained to describe two different parts: precipitate-free and precipitate containing interdiffusion zone. Pt and Al content strongly influence the compositional distribution, growth of phases, and growth kinetics. However, the types of topologically close-packed phases are the same irrespective of the difference in bond coat composition. In-depth TEM analysis indicates the presence of µ, σ, P, and R phases. The compositions of certain components in these phases are found to be significantly different. Graphical abstract: [Figure not available: see fulltext.

Item Type:	Journal Article
Publication:	Journal of Materials Science
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer.
Keywords:	Superalloys, Al content; Bond coats; Compositional distribution; Diffusion controlled growth; Directionally solidified superalloy; Growth characteristic; Growth mechanisms; Nickel aluminide bond coats; TEM analysis; Topologically close packed phase, Growth kinetics
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	31 Jan 2023 07:16
Last Modified:	31 Jan 2023 07:16
URI:	https://eprints.iisc.ac.in/id/eprint/79625

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