ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Structure, microstructure and hydriding properties of mechanically alloyed 2Mg-Nimixture were investigated. Two different nanocomposites were synthesized by mechanical alloying(MA) in a low-energy planetary mill, namely MN100 (100 h of milling) and MN200 (200 h ofmilling). The formation of nanocrystalline Mg2Ni was detected as a function of the milling time. Anappropriate combination of MA plus annealing under mild conditions accomplishes the completeformation of Mg2Ni phase. The pressure-composition isotherms of the two samples reveal differenthydrogen storage capacities and plateau slopes. In addition, the low temperature Mg2NiH4(LT)formed by hydriding/cooling of MN100 h decomposes at 190 °C, whereas this hydride producedfrom MN200 first transforms to the high temperature Mg2NiH4and then decomposes near 245 °C.The differences in the hydriding/dehydriding properties of MN100 and MN200 were associatedwith the microstructure and structure of the phases formed during MA followed by heating underargon/hydrogen
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.570.52.pdf
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