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SYNTHESIS AND CHARACTERIZATION OFHIGH-ENERGY BALL MILLEDNANOSTRUCTURED Co50Ni50

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Conférence Internationale sur le Soudage, le CND et l’Industrie des Métaux, IC-WNDT-MI’10 2010

SYNTHESIS AND CHARACTERIZATION OF HIGH-ENERGY BALL MILLED

NANOSTRUCTURED Co50Ni50

N. Loudjani, N. Bensebaa, L. Dekhil, J.J. Suñol, J.M. Grenèche

Abstract : Mechanical alloying method was used to prepare nanocrystalline Co50Ni50 alloy. X-ray diffraction was applied to determinate the structure of the alloy. Structural and microstructural parameters (lattice parameters, microstrains, crystallite sizes and phase percentages) were deduced from the Rietveld refinement of XRD patterns, by using the MAUD program, and discussed as a function of milling time. XRD results indicated that the crystalline solid solutions were achieved after 6h of milling. SEM observations revealed that mechanical alloys consist of agglomerated fineparticles of about 24 nm in size

Keywords : Nanomaterials; Mechanical alloying;Ni-Co alloys; Differential scanning calorimetry; X-ray diffra

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