Synthesis of Composite Metal Hydride Alloy of A₂B and AB₂ Type by Mechanical Alloying and Spark Plasma Sintering

Abstract:

The effects of Ca addition on the microstructure and mechanical properties of AZ91 magnesium alloy have been investigated. The main changes in microstructure caused by Ca addition were the grain refinement in the as-cast alloys and the formation of new Al2Ca phase along the grain boundaries. The tensile strength and elongation of the AZ91 magnesium alloy were improved by small addition of Ca due to grain refinement and replacement of Mg17Al12 phase with new Al2Ca compound. However, when above 0.7wt.% Ca was added, mechanical properties of AZ91 magnesium alloy were decreased.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 2449-2452
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.2449
• Online since: January 2005
• Authors: Nam Young Suk, Kyung Sub Lee
• Keywords: Composite Metal Hydride, Degradation, Mg₂Ni Alloy, Ni-MH Secondary Battery

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