Characterization Of Size Dependent Thermal Properties In Strained Nanocrystalline Powder Using Williamson – Hall Method

Abstract

In this present investigation Williamson–Hall technique has been used for the size dependent thermal properties are crystallite size, effect of strain on the Debye Waller factors, root mean square amplitudes of vibrations and Debye temperatures of nickel nanoparticles. The ball milled nanopowders has been characterized by X-ray diffraction method. The values of the crystallite size and strain obtained from the Williamson-Hall method to the experimental data were reasonable. The ball milling time increased with decreasing particle size, Debye temperature, vacancy formation energy and increasing strain, mean square amplitudes of vibrations and Debye-Waller factor for the nickel sample. The change in lattice strain particle size of the samples was explained by Williamson-Hall method. All the thermal properties of nickel nanoparticles were explained more precisely using Williamson-Hall plots, and also milling time versus thermal properties plots. The results calculated were approximately similar with the standard values.