Fe sub 16 Nb sub 6 Si sub 7 and Fe sub 16 Ta sub 6 Si sub 7 : New D8 sub a phases synthesized by the crystallization of mechanically alloyed amorphous powders

Ternary phases with the cubic D8 sub a structure (isostructural to Mg sub 16 Cu sub 6 Si sub 7 ) were identified in both the Fe-Nb-Si and Fe-Ta-Si systems. They form during the crystallization of mechanically alloyed amorphous materials and are thermally stable during heat treatments up to 90 h at 1...

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Bibliographic Details
Published in:Journal of alloys and compounds 2001-03, Vol.316 (1-2), p.203-208
Main Authors: Rixecker, G, Haberkorn, R
Format: Article
Language:English
Online Access:Get full text
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Summary:Ternary phases with the cubic D8 sub a structure (isostructural to Mg sub 16 Cu sub 6 Si sub 7 ) were identified in both the Fe-Nb-Si and Fe-Ta-Si systems. They form during the crystallization of mechanically alloyed amorphous materials and are thermally stable during heat treatments up to 90 h at 1050 deg C. The X-ray powder diffraction data were evaluated (i) by local line fit, and (ii) by Rietveld analysis. Mossbauer spectroscopy was used to complement the XRD results and to show the absence of magnetic ordering above 77 K.
ISSN:0925-8388