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Título:
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Near-neighbor mixing and bond dilation in mechanically alloyed Cu-Fe
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Autores:
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Kirkland, J. P. ;
Woicik, J. C. ;
Crespo del Arco, Patricia ;
Hernando Grande, Antonio ;
Garcia Escorial, A.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 1996-08-01
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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Extended x-ray-absorption fine-structure (EXAFS) measurements were used to obtain element- specific, structural, and chemical information of the local environments around Cu and Fe atoms in high-energy ballmilled Cu_Fe_(12-X) samples (x=0.50 and 0.70). Analysis of the EXAFS data shows both Fe and Cu atoms reside in face-centered-cubic sites where the first coordination sphere consists of a mixture of Fe and Cu atoms in a ratio which reflects the as-Prepared stoichiometry. The measured bond distances indicate a dilation in the bonds between unlike neighbors which accounts for the lattice expansion measured by x-ray diffraction. These results indicate that metastable alloys having a positive heat of mixing can be prepared via the high-energy ballmilling process.
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En línea:
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https://eprints.ucm.es/42269/1/CrespoP%2025%20LIBRE.pdf
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