Mössbauer study of amorphous and nanocrystalline Fe73.5Cu1Nb3Si13.5B9

Autor:	X. Z. Zhou, D. G. Naugle, A. H. Morrish, R. Pan
Rok vydání:	1993
Předmět:	Amorphous metal Materials science Condensed matter physics Annealing (metallurgy) Metallurgy General Physics and Astronomy Curie temperature Grain boundary Coercivity Grain size Nanocrystalline material Amorphous solid
Zdroj:	Journal of Applied Physics. 73:6597-6599
ISSN:	1089-7550 0021-8979
Popis:	The superior soft magnetic material, Fe73.5Cu1Nb3Si13.5B9, formed by partially crystallizing amorphous ribbons upon annealing, has been investigated using x‐ray diffraction and Mossbauer spectroscopy. The microstructure of the annealed ribbons consists mainly of DO3 α‐FeSi nanocrystallites and an amorphous phase that lies in the grain boundaries. This residual amorphous phase has a Curie temperature of about 600 K; when it becomes a paramagnet the coercivity of the ribbon increases dramatically. It follows that, in addition to the nanocrystallite grain size and the random anisotropy, the coupling between the nanocrystallites by the amorphous grain boundaries is important for the achievement of the excellent soft properties. When Cu is replaced by Ag or Ni, a higher annealing temperature is required to produce nanocrystals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b36bbc097b70ff1ccbd4c8d8a44846d7 https://doi.org/10.1063/1.352576 Zobrazit plný text záznamu