Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1485416 | Journal of Non-Crystalline Solids | 2007 | 4 Pages |
Abstract
Cu70Fe18Co12 alloy is prepared by mechanical alloying of pure Cu, Fe, Co powder using a high energy ball mill, with increasing milling time ranging from 4 to 8, 24, 36 and 54Â h. The variation of the morphology and the elemental distribution were measured at these different stages on various grains of the alloy using a scanning electron microscope with a dispersive energy analyzer. Atomic clusters of iron were observed on some grains after 8Â h of milling, confirming the non-homogenisation of the powder at this stage. Beyond 12Â h, the homogenisation is ensured over a volume of one cube micron. Microstructural changes during the mechanical alloying have been studied by X-ray diffractometry (XRD) and Mössbauer spectroscopy. X-ray diffraction measurements confirm the dissolution of iron and cobalt phases in the FCC matrix of copper after 24Â h of milling with increase of the structural parameter. This same dissolution was also measured by Mössbauer spectroscopy, confirming that after 4Â h of milling the CuFe phase begins to form and iron dissolution is incomplete with partial amount of alpha Fe phase surviving after 36Â h of milling.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Warda Laslouni, Kamel Taibi, Djaffar Dahmoun, Mohamed Azzaz,