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A. Penton-Madrigal, R. Sato Turtelli, E. Estévez-Rams, R. Grössinger:
"Structural evolution with Nb content in melt-spun Fe_80-xSi₂₀Nb_x ribbons";
Journal of Alloys and Compounds, 395 (2005), S. 63 - 67.

Structural evolution with Nb content in melt-spun Fe_80-xSi₂₀Nb_x ribbons

A. Penton-Madrigal a, R. Sato Turtelli b, E. Estevez-Rams c and R. Grössinger b

a Facultad de Fisica-IMRE, Universidad de la Habana, San Lazaro y L. CP 10400, C. Habana, Cuba
b Institut für Festkörperphysik, Technische Universität Wien, Wiedner Haupstrasse 8-10, A-1040 Vienna, Austria
c IMRE, Universidad de la Habana, San Lázaro y L. CP 10400, C. Habana, Cuba

Received 19 October 2004; revised 13 November 2004; accepted 16 November 2004. Available online 1 January 2005.

Abstract

The structural evolution with increasing Nb content in Fe_80-xSi₂₀Nb_x alloys (0 < x <= 12) was investigated by means of high-resolution X-ray diffraction. A metastable NbFe_2-xSi_x hexagonal phase was found together with cubic bcc Fe_100-ySi_y solid solution and the amorphous matrix. The grain size of the bcc Fe_100-ySi_y phase and the strain were determined and their dependencies on the Nb content and heat treatment of the samples were investigated. The strain increases and the grain size decreases with an increasing of Nb content reaching a size down to 37 nm. Upon heat treatment of the samples, the hexagonal phase decomposes in two hexagonal phases with similar compositions.

Keywords: Fe-Si alloys; Nanostructure; Casting; X-ray diffraction

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05937944

http://dx.doi.org/10.1016/j.jallcom.2004.11.026