Self-diffusion behaviour and microstructure of ultrafine-grained Nd2Fe14B with intergranular melting transition

Herth S, Ye F, Eggersmann M, Rosner H, Gutfleisch O, Wurschum R (2004)
ZEITSCHRIFT FUR METALLKUNDE 95(10): 895-903.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Herth, SimoneUniBi; Ye, F; Eggersmann, M; Rosner, H; Gutfleisch, O; Wurschum, R
Abstract / Bemerkung
The interface diffusion was studied in ultrafine-grained Nd2Fe14B which shows an intergranular melting transition owing to an excess amount of Nd. Below the intergranular melting transition, the interface diffusion of Fe-59 is similar to grain boundary diffusivities in bcc Fe. The microstructure and intergranular melting transition show characteristic variations with the Nd excess which sensitively affects the diffusivity at and above the melting transition. In Nd2Fe14B with high Nd excess, which contains extended Nd-rich triple junctions, the melting transition occurs at ca. 950 K in one step leading to an abrupt increase of the diffusion coefficient. In Nd2Fe14B with low Nd excess, which is free from additional phases at triple junctions, the diffusion coefficient above the melting transition increases gradually. Interface diffusion is found to have no rate-controlling influence on the hot-deformation used for the generation of magnetic anisotropy.
Stichworte
intergranular melting transition; permanent magnet; interface diffusion; NdFeB; liquid films
Erscheinungsjahr
2004
Zeitschriftentitel
ZEITSCHRIFT FUR METALLKUNDE
Band
95
Ausgabe
10
Seite(n)
895-903
ISSN
0044-3093
Page URI
https://pub.uni-bielefeld.de/record/2355110

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Herth S, Ye F, Eggersmann M, Rosner H, Gutfleisch O, Wurschum R. Self-diffusion behaviour and microstructure of ultrafine-grained Nd2Fe14B with intergranular melting transition. ZEITSCHRIFT FUR METALLKUNDE. 2004;95(10):895-903.
Herth, S., Ye, F., Eggersmann, M., Rosner, H., Gutfleisch, O., & Wurschum, R. (2004). Self-diffusion behaviour and microstructure of ultrafine-grained Nd2Fe14B with intergranular melting transition. ZEITSCHRIFT FUR METALLKUNDE, 95(10), 895-903. doi:10.3139/146.018041
Herth, S., Ye, F., Eggersmann, M., Rosner, H., Gutfleisch, O., and Wurschum, R. (2004). Self-diffusion behaviour and microstructure of ultrafine-grained Nd2Fe14B with intergranular melting transition. ZEITSCHRIFT FUR METALLKUNDE 95, 895-903.
Herth, S., et al., 2004. Self-diffusion behaviour and microstructure of ultrafine-grained Nd2Fe14B with intergranular melting transition. ZEITSCHRIFT FUR METALLKUNDE, 95(10), p 895-903.
S. Herth, et al., “Self-diffusion behaviour and microstructure of ultrafine-grained Nd2Fe14B with intergranular melting transition”, ZEITSCHRIFT FUR METALLKUNDE, vol. 95, 2004, pp. 895-903.
Herth, S., Ye, F., Eggersmann, M., Rosner, H., Gutfleisch, O., Wurschum, R.: Self-diffusion behaviour and microstructure of ultrafine-grained Nd2Fe14B with intergranular melting transition. ZEITSCHRIFT FUR METALLKUNDE. 95, 895-903 (2004).
Herth, Simone, Ye, F, Eggersmann, M, Rosner, H, Gutfleisch, O, and Wurschum, R. “Self-diffusion behaviour and microstructure of ultrafine-grained Nd2Fe14B with intergranular melting transition”. ZEITSCHRIFT FUR METALLKUNDE 95.10 (2004): 895-903.