Mg/MmNi5-x(CoAlMn)x Hydrogen Absorption Composite Synthesized by Mechanical Alloying
Mg/MmNi5-x(CoAlMn)x composite hydrogen storage alloy has been synthesized by mechanical alloying.Xray diffraction and SEM have been used to study the microstructure characteristics of the materials.The results showed that Mg/MmNi5-x(CoAlMn)x granule structure was formed after certain milling time.These granules were composed of very fine MmNi5-x(CoAlMn)x particles and magnesium,in which the magnesium acted as binder.According to the Xray diffraction result,the grain size of MmNi5-x(CoAlMn)x and magnesium phases was estimated for the composites of different compositions and milling conditions estimated.
The most widespread lithic elements in manganese nodules are elements of the group of alkaline and alkaline-earth elements, namely, potassium, sodium, calcium, magnesium, barium; elements of the lithogenic group or hydrolysate elements: aluminium and titanium; silicon which is of a polygenic nature (litho- and biogenic); and elements of the biogenic group, namely, carbon, phosphorus and sulphur (we shall also consider nitrogen as being related to this group). We shall also consider pore water, which plays an important role but which is sometimes ignored.