Stability of AB5-type hydrogen storage alloys

Stability of PrCo5+δ and Pr1−xHfxCo5+δ alloys with TbCu7-type structure at 900–1150°C and their magnetic properties

“…The a, c and T C values reported for Corich TbCu 7 -type alloys obtained via high-energy ball milling [9,10] cannot be directly compared to our data, since those alloys were modified with Ti or Zr. Also, the a, c and 4M s values reported for Pr 13 Co 87 epitaxial films [26] (strongly deviating from the Vegard's law) may be incompatible to our data on bulk alloys.…”

“…One, obvious reason for this shortage is the fact that many RCo 5+ı structures, including the disordered R 2 Co 17 , are not stable. The other reason, which is rather paradoxical, is that too much attention has been focused on the RCo 5+ı structures with ı = 2 (in [8][9][10][11][12][13][14][15] and at least 45 other studies). These RCo 7 structures are typically treated not as representatives of the RCo 5+ı solid solutions, but as unique compounds, even though there is no experimental data favoring the RCo 7 composition over any other in the whole range of the RCo 5+ı structures.…”

Pressure–composition–temperature hysteresis in C14 Laves phase alloys: Part 3. Empirical formula

“…demonstrated: MH alloy heat of formation [25][26][27][28][29][30], desorption pressure [31,32], PCT hysteresis [33], AC impedance [34], internal resistance [35], radio frequency loss [36], discharge voltage [37][38][39][40], state-of-charge [41,42], temperature [43], electrode cycle life [44], and recovery of nickel and cobalt [45] from NiMH batteries.…”

LaNi5 related AB5 compounds: Structure, properties and applications

“…This is a very practical and useful way to anticipate the properties. Unfortunately, it was later found that the model is not universal and that the slope of the linear dependence can change with the nature of the substitution element [6,26,30,47,48].…”