Hydrogen Absorption Performance of Mechanically Alloyed (Mg2Ni)100-xTix Powder
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The hydrogen storage alloy (Mg<SUB>2</SUB>Ni)<SUB>100−<I>x</I></SUB>Ti<I><SUB>x</SUB></I> (<I>x</I>=0, 2.5, 5.0, 7.5 and 10.0 at%) powders were synthesized from elemental powder mixture by mechanical alloying (MA) under an Ar atmosphere. The as-milled powders were examined as a function of titanium addition by X-ray diffraction and synchrotron X-ray absorption near-edge structure (XANES) techniques at various milling time. The hydrogen absorption kinetics of the 15 h as-milled powders were evaluated. The maximum hydrogen absorption content of 15 h as-milled Mg<SUB>2</SUB>Ni powders can be improved from 3.14 mass% to 3.88 mass% when 5.0 at% of titanium was added. The hydrogenation rate of the Mg<SUB>2</SUB>Ni powder was also obviously enhanced by introducing the titanium into Mg<SUB>2</SUB>Ni lattices. More than 20% improvement of hydrogen absorption for Mg<SUB>2</SUB>Ni intermetallic powders was achieved by adding titanium.
- The Japan Institute of Metals and Materialsの論文
The Japan Institute of Metals and Materials | 論文
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