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Thermal stability of a supersaturated Fe-Ge-Nb solid solution produced by ball milling

 

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Opened Access Thermal stability of a supersaturated Fe-Ge-Nb solid solution produced by ball milling
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Author: Conde Amiano, Alejandro
Ipus Bados, Jhon Jairo
Blázquez Gámez, Javier Sebastián
Department: Universidad de Sevilla. Departamento de Física de la Materia Condensada
Date: 2010
Published in: Journal of Physics: Conference Series, 217 (012083)
Document type: Article
Abstract: Thermal evolution of Fe neighbourhood in a supersaturated bcc Fe(Ge,Nb) solid solution, obtained as the final product of mechanical alloying of Fe75Ge20Nb5, was studied. No changes in Fe neighbourhood were detected after heating up to 473 K, although differential scanning calorimetry shows a clear deviation of the baseline at 400 K. After heating up to 723 K, a similar nanocrystalline microstructure is derived from X-ray diffraction. However, Mössbauer spectra evidence changes in the Fe neighbourhood. A proposed deconvolution of the hyperfine field distribution yields a Ge content of ~10 at. %, in agreement with the maximum solubility of Ge in bcc Fe in thermodynamical equilibrium.
Size: 479.5Kb
Format: PDF

URI: http://hdl.handle.net/11441/33165

DOI: http://dx.doi.org/10.1088/1742-6596/217/1/012083

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