Morphology, structural and thermal characterization of nanocrystalline Ni50Cu30(Fe2B)(10)P-10 powders prepared by mechanical alloying

摘要

The mechanical alloying process has been used to prepare nanocrystalline Ni50Cu30(Fe2B)(10)P-10 alloy from powder mixture. The transformations occurring in the material during milling were studied with the use of X-ray diffraction. In addition, lattice microstrain, average crystallite size, dislocation density and the lattice parameter were determined. The patterns so obtained were analyzed using the Maud program. The final product of the mechanical alloying process after 30 h of milling was nanocrystalline Ni, Cu3P and Fe2B phases with a mean crystallite size in the range of a few nanometers. Scanning electron microscopy (SEM) was employed to examine the morphology of the samples as a function of milling times. Thermal behaviour of the milled powders was examined by differential scanning calorimetry (DSC).