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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

© Powder Technology, 2012, vol. 224, p. 338-344

Elsevier

Author: Azabou, M.
Ibn Gharsallah, H.
Escoda i Acero, Ma. Lluïsa
Suñol Martínez, Joan Josep
Kolsi, A.W.
Khitouni, Mohamed
Date: 2012 July 1
Abstract: 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
ISSN: 0032-5910
Document access: http://hdl.handle.net/10256/12834
Language: eng
Publisher: Elsevier
Collection: MICINN/PN2010-2013/MAT2009-13108-C02-02
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.powtec.2012.03.016
Articles publicats (D-F)
Is part of: © Powder Technology, 2012, vol. 224, p. 338-344
Rights: Tots els drets reservats
Subject: Òxid de coure
Copper oxide
Aliatges
Alloys
Raigs X -- Difracció
X-rays -- Diffraction
Title: Mechanochemical reactions in nanocrystalline Cu-Fe system induced by mechanical alloying in air atmosphere
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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