Effect of Mechanical Milling on the Microstructure and Hydrogen Interaction of Both Mm-Ni and MmNi5-Ni Mixtures


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Mechanical milling (MM) and a combination of MM and temperature heating were used to synthesize the intermetallic MmNi5 and a MmNi5-Ni mixture, respectively. The process evolution with time was analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). SEM was used to characterize size and morphology of particles in order to reveal the governing mechanisms during the milling of each system. X-ray diffraction (XRD) was utilized to determine strain and crystallite size changes introduced by milling. The effects of integrated milling time on the sorption properties of the MmNi5-Ni mixture were analyzed. Results were correlated to defects introduced into microstructure. A comparison of the final characteristics of alloys obtained in each case is also shown.



Edited by:

Dílson S. dos Santos




M. R. Esquivel and G. Meyer, "Effect of Mechanical Milling on the Microstructure and Hydrogen Interaction of Both Mm-Ni and MmNi5-Ni Mixtures ", Materials Science Forum, Vol. 570, pp. 72-77, 2008

Online since:

February 2008




[1] C. Suryanarayana, E. Ivanov and V.V. Boldyrev: Mat. Sc. Eng. A, Vol 304-306, (2005), pp.151-158.

[2] R.A. Varin, S. Li, Ch. Chiu., L. Guo, O. Morozova, T. Khomenko and Z. Wronski: J. Alloys. Compd., Vol 404-406, (2005), pp.494-498.

DOI: https://doi.org/10.1016/j.jallcom.2004.12.176

[3] A. Djekoun, B. Bouzabata, A. Otmani and J. M. Greneche: Catalysis Today, Vol 89, (2004), pp.319-323.

DOI: https://doi.org/10.1016/j.cattod.2003.12.018

[4] J. Lyubina, O. Gutfleisch, R. Skomski, K-H. Müller and L. Schultz: Scripta Mater, Vol 53, (2005), pp.469-474.

[5] M. Jurczyk and W. Majchrzycki: J. Alloys Compd., Vol 311, (2000), pp.311-316.

[6] M. Jurczyk, W. Rajewski, W. Majchrzycki and G. Wójcik: J. Alloys Compd., Vol 290, (1999), pp.262-266.

[7] Z. Dehouche, N. Grimard, F. Laurencelle, J. Goyette and T.K. Bose: J. Alloys Compd . Vol. 399, (2005), pp.224-236.

DOI: https://doi.org/10.1016/j.jallcom.2005.01.029

[8] P. Muthukmar, M. Prakash Maiya and S. Srinivasa Murthy: Int. J. Hydrogen Energy. Vol 30, (2005), pp.1569-1581.

[9] R. A. Young, (Ed), The Rietveld Method, (International Union of Crystallography, Oxford University Press, 1983).

[10] DBWS, 9411 an upgrade of the DBWS programs for Rietveld refinement with PC and mainframe computers, J. Appl. Cryst,. 28, (1995) , 366 -367.

DOI: https://doi.org/10.1107/s0021889895002160

[11] S. Enzo, E. Bonetti, I. Soletta, G. Cocco : J. Phys. D: Appl. Phys. Vol 24, (1991), pp.209-216.

[12] G. Meyer, D. Rodriguez, F. Castro, G. Fernandez, Proceedings of the 11 th Wordl Hydrogen Energy Conference, Stuttgart, Hydrogen Energy Process, Vol XI, (1996), pp.1293-1298.