Title

Interdiffusion In L1 2-Ni 3Al Alloyed With Re

Keywords

High-temperature alloys; Intermetallics; L1 2; Ni Al 3; Re; Ternary interdiffusion

Abstract

Ternary interdiffusion in L1 2-Ni 3Al with ternary alloying addition of Re was investigated at 1473 K using solid-to-solid diffusion couples. Interdiffusion flux of Ni, Al, and Re were directly calculated from experimental concentration profiles and integrated for the determination of average ternary interdiffusion coefficients. The magnitude of main interdiffusion coefficients D̄̃ NiNiAl and D̄̃ AlAlNi was determined to be much larger than that of the main interdiffusion coefficient D̄̃ ReReAl(orNi) A moderate tendency for Re to substitute for Al sites was reflected by its influence on interdiffusion of Al, quantified by large and positive D̄̃ AlReNi coefficients. Similar trends were observed from ternary interdiffusion coefficients determined by Boltzmann-Matano analysis. Profiles of concentrations and interdiffusion fluxes were also examined to estimate binary interdiffusion coefficients in Ni 3Al, and tracer diffusion coefficients of Re (5.4 × 10 -16 ± 2.3 × 10 -16 m 2/s) in Ni 3Al. © 2009 ASM International.

Publication Date

6-1-2009

Publication Title

Journal of Phase Equilibria and Diffusion

Volume

30

Issue

3

Number of Pages

246-253

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s11669-009-9499-9

Socpus ID

67650822644 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/67650822644

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