Influence of the grain size on the magnetic properties of ball milled Fe90W10

M. Kis-Varga, D. Beke, L. Daróczi

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Fe(W) nanocrystalline solid solutions with 10 at% W content have been produced by ball milling of elemental Fe and W powders. The milling was performed for 450 hours in a vibrating mill using hardened steel vial and ball. The structural study by X-ray diffraction showed the formation of b.c.c. solid solution of W in Fe during the first 100 hours period of milling and the decrease of grain size to cca. 9 nm within the same time. Magnetization curves up to 1 T field have been measured at room temperature by a vibration magnetometer. The saturation magnetization showed no significant change by decreasing grain size, which is in good agreement with earlier published observations on other nanocrystalline magnetic materials. The coercivity has a maximum at grain size of about 16 nm and a steep decrease at smaller grain sizes. The latter is probably due to the decreased anisotropy constant, which leads to a sharp decrease in coercivity according to the random anisotropy model.

Original languageEnglish
Title of host publicationMaterials Science Forum
PublisherTrans Tech Publ
Volume343
Publication statusPublished - 2000
EventISMANAM-99: The International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials - Dresden, Ger
Duration: Aug 30 1999Sep 3 1999

Other

OtherISMANAM-99: The International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials
CityDresden, Ger
Period8/30/999/3/99

Fingerprint

Coercive force
Solid solutions
Magnetic properties
Anisotropy
Nanocrystalline materials
Steel
Magnetic materials
Ball milling
Magnetometers
Saturation magnetization
Powders
Magnetization
X ray diffraction
Temperature

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Kis-Varga, M., Beke, D., & Daróczi, L. (2000). Influence of the grain size on the magnetic properties of ball milled Fe90W10. In Materials Science Forum (Vol. 343). Trans Tech Publ.

Influence of the grain size on the magnetic properties of ball milled Fe90W10. / Kis-Varga, M.; Beke, D.; Daróczi, L.

Materials Science Forum. Vol. 343 Trans Tech Publ, 2000.

Research output: Chapter in Book/Report/Conference proceedingChapter

Kis-Varga, M, Beke, D & Daróczi, L 2000, Influence of the grain size on the magnetic properties of ball milled Fe90W10. in Materials Science Forum. vol. 343, Trans Tech Publ, ISMANAM-99: The International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials, Dresden, Ger, 8/30/99.
Kis-Varga M, Beke D, Daróczi L. Influence of the grain size on the magnetic properties of ball milled Fe90W10. In Materials Science Forum. Vol. 343. Trans Tech Publ. 2000
Kis-Varga, M. ; Beke, D. ; Daróczi, L. / Influence of the grain size on the magnetic properties of ball milled Fe90W10. Materials Science Forum. Vol. 343 Trans Tech Publ, 2000.
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