The effect of aluminum additions on the structural and hydrogen absorption properties of AB5 alloys with particular reference to the LaNi5−xAlx ternary alloy system

Synthesis of Ti–Fe alloys by mechanical alloying

“…This difference should correspond to the difference of the size of interstitial sites. It is also known that there is good relationship between the size of interstitial sites and plateau pressure for AB 5 alloys systems, the larger size of interstitial sites the lower plateau pressure [35][36][37][38][39]. In this study, especially the second plateau pressure appeared at higher, even though the lattice parameter of TiFe prepared by MA was expanded.…”

Effect of rare earth on lattice size and equilibrium hydrogen pressure for AB5-type MmNi3.55Co0.75Al0.30Mn0.40

“…The composition of Mm was expressed as M x La 0.81−x Nd 0.14 Pr 0.05 (M x : Ce 0.47 , Y 0.40 , Gd 0.25 , Tm 0.20 , Lu 0.16 ). We prepared these alloys in order to investigate the effect of rare earth to equilibrium hydrogen pressure based on a linear relationship between the lattice volume and the equilibrium hydrogen pressure in AB 5 -type alloys [17][18][19]. Therefore, these amounts of substitution were adjusted to make the unit cell volume of the alloys the same considering each atomic radius of substitution element.…”

Structure and electrochemical properties of La2−xMgxNi7.0 (x=0.3–0.6) hydrogen storage alloys

“…With the increase of Mg content, the plateau pressure of hydrogen absorption and desorption rises gradually from 0.082 atm to 0.204 atm and from 0.002 atm to 0.121 atm, respectively. This indicates that the increase of the Mg content modulates the stability of hydride phase due to the decrease of cell volume [22]. It is also of interest that the hysteresis factor also decreases dramatically from 2.079 to 0.227 with the increase of Mg content.…”