Interdiffusion, intrinsic diffusion and vacancy wind effect in Fe-Al alloys at 1000 C

Journal Article · Fri Dec 04 04:00:00 EST 1998 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(98)00391-1· OSTI ID:305415

Sohn, Y H; Dayananda, M A ^[1]

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1. Purdue Univ., West Lafayette, IN (United States). School of Materials Engineering

Diffusion in {beta}(B{sub 2}) and {beta}{prime}(bcc) Fe-Al alloys are of practical interest due to the potential applications at high temperatures. A review of available diffusion data for Fe-rich Fe-Al alloys at 1000 C indicates appreciable differences in the reported values of interdiffusion coefficients. Intrinsic diffusion coefficients and tracer diffusion coefficients are available for selected compositions and temperatures. In this paper are presented interdiffusion and intrinsic diffusion studies carried out at 1000 C with solid-solid diffusion couples assembled with Fe-Al alloys containing up to 50 at.% Al. Intrinsic diffusion coefficients were determined at marker compositions and were employed for an estimation of atomic mobilities and vacancy wind parameters on the basis of a random alloy model incorporating vacancy wind effect. Thermodynamic factors were also assessed at the marker compositions.

• Sponsoring Organization: Argonne National Lab., IL (United States)
• OSTI ID: 305415
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 1 Vol. 40; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MICROSTRUCTURE
SELF-DIFFUSION
TEMPERATURE RANGE 1000-4000 K