Obtaining of the Ir-Al Nanocrystalline Powders by Mechanical Alloying

Abstract:

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.

• Periodical: Materials Science Forum (Volume 672)
• Pages: 171-174
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.672.171
• Online since: January 2011
• Authors: Ionel Chicinaş, P. Cârlan, Florin Popa, Virgiliu Călin Prică, L. Adriana Sorcoi
• Keywords: Mechanical Alloying (MA), Nanocrystalline, Radiation Target

References

[1] Attya A. Abou-Zaid, M. Nasr, Annals Nuclear Energy Vol. 31 (2004), p.87.

[2] V. A. Tarasov and Yu. G. Toporov, Appl. Radiation Isotops Vol. 48 (1997), p.1697.

[3] B.S. Murty, S. Ranganathan, Int. Mater. Rev. Vol. 43 (1998), p.101.

[4] C. C. Koch, J. D. Whittenberger, Intermetallics Vol. 4 (1996), p.339.

[5] C. Suryanarayana, Progr. Mater. Sci. Vol. 46 (2001), p.1.

[6] A. Arrott, Nanostructured Mater. Vol. 12 (1999), p.1135.

[7] D.L. Zhang, Progr. Mater. Sc. Vol. 49 (2004), p.537.

[8] E. Gaffet, G. Le Caër, Mechanical Processing for Nanomaterials, Enciclopedia of Nanoscience and Nanotechnology, Ed by H.S. Nalwa, American Scientific Publishers, 2004, Vol. X, p.1.

[9] I. Chicinaş, J. Optoelectron. Adv. Mater. Vol. 8 (2006), p.439.

[10] V. Pop, I. Chicinaş, J. Optoelectron. Adv. Mater. Vol. 9 (2007), p.1478.

[11] I. Chicinaş, V. Pop, O. Isnard, J. Magn. Magn. Mater. Vol. 242-245 (2002), p.885.

[12] I. Chicinaş, V. Pop, O. Isnard, J. M. Le Breton, J. Juraszek, J. All. Comp. Vol. 352 (2003), p.34.

[13] V. Pop, O. Isnard, I. Chicinaş, J. All. Comp. Vol. 361 (2003), p.144.

[14] Paula Carlan – Process for preparing sinterable iridium powder Nr. Patent 115704 / (2000).

[15] J.I. Langford, Proc. Internat. Conf. Accuracy in Powder Diffraction II, Gaithersburg, MD, Maz 26-29 (1992), p.110.

[16] C. C. Koch, J. D. Whittenberger, Intermetallics Vol. 4 (1996), p.339.