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

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Abstract:

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.

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Periodical:

Materials Science Forum (Volume 570)

Pages:

72-77

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.570.72

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Online since:

February 2008

Authors:

Marcelo R. Esquivel, Gabriel Meyer

Keywords:

Mechanical Milling, Mischmetal, MmNi5

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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