Thesis - Oztek_Muzaffer_T_200508_MA

3.2.2.3. LaNi 5 with Al
The sample containing 12% Al was pressurized with pure He to verify inertness.
There was no pressure drop observed (Figure 29); therefore, all samples of LaNi 5 and
LaNi 5 Al x were accepted to be non-interacting with He.
Pressure transducer output (mV)
20
18
16
14
12
10
8
Sample cell
Reference cell
0 500 1000 1500 2000 2500 3000
time (s)
Figure 29: Pressure transducer output of DSC for 50 mole % Al in LaNi 5 under pure He
atmosphere.
LaNi 5 samples containing 0.77, 4.74 and 12.00 mole % Al were hydrided using
50% (v/v) H 2 -He mixture, as described for pure LaNi 5 in section 3.2.2.2, using two
different pressures, 6.6 and 10 atm. The amounts of hydrogen absorbed at different H 2
partial pressures are given in Table 4. For all the samples, percent hydrogen absorbed was
similar, provided that the partial pressures of H 2 were equal. For lower partial pressures,
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