Obtaining of the Ir-Al Nanocrystalline Powders by Mechanical Alloying
The Ir-Al powder in the 1:1 atomic ratio was obtained by high energy mechanical alloying in a Pulverisette 4 Fritch planetary mill. The final product was obtained after 28 h of milling in argon atmosphere. Alloy formation was investigated by X-ray diffraction. After 4 h of milling the new structure of IrAl compound is found in the diffraction patterns. The obtained powders are nanocrystalline with a mean crystallite size of 11 nm after 28 h of milling. The particle morphology and the chemical homogeneity were studied using scanning electron microscopy (SEM) and energy dispersive spectrometry (EDX). It was found that the obtained compound present large particles composed by smaller one.
Ionel Chicinaş and Liviu Brânduşan
I. Chicinaş et al., "Obtaining of the Ir-Al Nanocrystalline Powders by Mechanical Alloying", Materials Science Forum, Vol. 672, pp. 171-174, 2011