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Mechanochemical reactions in nanocrystalline Cu-Fe system induced by mechanical alloying in air atmosphere

Metastable nanocrystalline FCC and BCC Fe-Cu solid solutions were synthesized from elemental powders using a high-energy ball mill in air atmosphere. The structural and morphological changes during mechanical milling were investigated by X-ray diffraction and scanning electron microscopy. The patterns so obtained were analyzed using the X’Pert High Score Plus program. The final product of the mechanical alloying process was nanocrystalline double-phase FCC Cu(Fe) and BCC Fe(Cu) solid solutions with a mean crystallite size in the range of a few nanometers. Moreover, the mechanical alloying of Fe-Cu, in air atmosphere, resulted in partial oxidation to Cu 2O and CuO. Prolonged milling supported the formation of CuO oxide and the interdiffusion between FCC-Cu(Fe), BCC-Fe(Cu) and cupric oxide (CuO). Scanning electron microscopy results showed that flattened Fe-Cu powders were laid and welded on each other and tended to form a matrix of randomly welded thin layers of highly deformed particles

This work has been supported by Spanish MEC under project MAT2009-13108-C02-02 and by Catalan DURSI under project 2009 SGR374

Elsevier

Director: Ministerio de Ciencia e Innovación (Espanya)
Autor: Azabou, Myriam
Ibn Gharsallah, Hana
Escoda i Acero, Ma. Lluïsa
Suñol Martínez, Joan Josep
Kolsi, A.W.
Khitouni, Mohamed
Data: 1 juliol 2012
Resum: Metastable nanocrystalline FCC and BCC Fe-Cu solid solutions were synthesized from elemental powders using a high-energy ball mill in air atmosphere. The structural and morphological changes during mechanical milling were investigated by X-ray diffraction and scanning electron microscopy. The patterns so obtained were analyzed using the X’Pert High Score Plus program. The final product of the mechanical alloying process was nanocrystalline double-phase FCC Cu(Fe) and BCC Fe(Cu) solid solutions with a mean crystallite size in the range of a few nanometers. Moreover, the mechanical alloying of Fe-Cu, in air atmosphere, resulted in partial oxidation to Cu 2O and CuO. Prolonged milling supported the formation of CuO oxide and the interdiffusion between FCC-Cu(Fe), BCC-Fe(Cu) and cupric oxide (CuO). Scanning electron microscopy results showed that flattened Fe-Cu powders were laid and welded on each other and tended to form a matrix of randomly welded thin layers of highly deformed particles
This work has been supported by Spanish MEC under project MAT2009-13108-C02-02 and by Catalan DURSI under project 2009 SGR374
Format: application/pdf
Accés al document: http://hdl.handle.net/10256/12834
Llenguatge: eng
Editor: Elsevier
Col·lecció: info:eu-repo/semantics/altIdentifier/doi/10.1016/j.powtec.2012.03.016
info:eu-repo/semantics/altIdentifier/issn/0032-5910
info:eu-repo/grantAgreement/MICINN//MAT2009-13108-C02-02/ES/Propiedades Funcionales De Microsistemas Basados En Aleaciones Magneticas Amorfas Y Cristalinas Obtenidos Mediante Enfriamiento Ultrarrapido/
Drets: Tots els drets reservats
Matèria: Òxid de coure
Copper oxide
Aliatges
Alloys
Raigs X -- Difracció
X-rays -- Diffraction
Títol: Mechanochemical reactions in nanocrystalline Cu-Fe system induced by mechanical alloying in air atmosphere
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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