Recent Advances in Understanding Diffusion in Multiprincipal Element Systems

Dash, A and Paul, A and Sen, S and Divinski, S and Kundin, J and Steinbach, I and Grabowski, B and Zhang, X (2022) Recent Advances in Understanding Diffusion in Multiprincipal Element Systems. In: Annual Review of Materials Research, 52 . pp. 383-409.

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Abstract

Recent advances in the field of diffusion in multiprincipal element systems are critically reviewed, with an emphasis on experimental as well as theoretical approaches to determining atomic mobilities (tracer diffusion coefficients) in chemically complex multicomponent systems. The newly elaborated and augmented pseudobinary and pseudoternary methods provide a rigorous framework to access tracer, intrinsic, and interdiffusion coefficients in alloys with an arbitrary number of components. Utilization of the novel tracer-interdiffusion couple method allows for a high-throughput determination of composition-dependent tracer diffusion coefficients. A combination of these approaches provides a unique experimental toolbox to access diffusivities of elements that do not have suitable tracers. The pair-exchange diffusion model, which gives a consistent definition of diffusion matrices without specifying a reference element, is highlighted. Density-functional theory-informed calculations of basic diffusion properties mdash asrequired for the generation of extensive mobility databases for technological applications mdash are also discussed.

Item Type:	Journal Article
Publication:	Annual Review of Materials Research
Publisher:	Annual Reviews Inc.
Additional Information:	The copyright for this article belongs to the Annual Reviews Inc.
Keywords:	Alloys; Calculations; Density functional theory, Ab initio simulations; CALPHAD approach; Exchange models; Experimental approaches; Interdiffusion; Multiprincipal element alloy; Multiprincipal elements; Pair-exchange model; Tracer diffusion; Tracer diffusion coefficients, Diffusion
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	04 Aug 2022 11:34
Last Modified:	04 Aug 2022 11:34
URI:	https://eprints.iisc.ac.in/id/eprint/75344

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