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Ni grain boundary diffusion in coarse-grained Fe-40 wt.% Ni alloy and comparison with Ni diffusion in the nanocrystalline alloy

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Veröffentlicht/Copyright: 20. Dezember 2021
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Abstract

63Ni grain boundary (GB) diffusion in polycrystalline γ-Fe – Ni alloy was measured by the conventional radiotracer method. The double product P = δ x Dgb (δ is the GB width and Dgb is the GB diffusivity) was found to follow the Arrhenius relationship P =1.31×10−13× exp(−157 kJ mol−1/RT) m3/s, where R is the gas constant and T is the temperature. The results in the coarse-grained material (grain size d ≈ 0.5 mm) were discussed in comparison with our previous investigation of Ni diffusion in a nanocrystalline alloy (d ≈ 100 nm) of the same composition.


Prof. Dr. Chr. Herzig, Institut für Materialphysik, Universität Münster, Wilhelm-Klemm-Str. 10, D-48149 Münster, Germany, Tel.: +49 251 83 33573, Fax: +49 251 83 38346

Funding statement: This joint German – Korean project was initiated and supported by the Alexander von Humboldt Foundation, Bonn, Germany. The authors (J. S. L. and Y. S. K.) gratefully acknowledge the financial support from the Korean Ministry of Science and Technology through the “National R & D Project for Nano Science and Technology”

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Received: 2003-10-13
Accepted: 2003-11-27
Published Online: 2021-12-20

© 2004 Carl Hanser Verlag, München

Heruntergeladen am 29.4.2026 von https://www.degruyterbrill.com/document/doi/10.3139/ijmr-2004-0018/html?lang=de
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