Item


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

Manager: Ministerio de Ciencia e Innovación (Espanya)
Author: Azabou, M.
Ibn Gharsallah, H.
Escoda i Acero, Ma. Lluïsa
Suñol Martínez, Joan Josep
Kolsi, A.W.
Khitouni, Mohamed
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
Document access: http://hdl.handle.net/2072/298204
Language: eng
Publisher: Elsevier
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: Recercat

Subjects

Authors