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were placed in the DSC. The cell was pressurized with about 4 atm H 2 and pressure was<br />
monitored at constant temperature to determine if ball milling alone activated the sample<br />
for hydrogen uptake. Pressure remained constant during the experiment, implying that<br />
the sample was not active.<br />
3.1.3.2. Effect of Thermal Activation<br />
The sample described above (section 3.1.3.1) was then subjected to a thermal<br />
activation cycle, followed by constant temperature hydriding at 5 atm H 2 . Pressure and<br />
thermal monitoring started immediately after the system was sealed. Pressure dropped<br />
instantly along and corresponded to the exotherm shown in the thermogram in Figure 17.<br />
The sample took up 1.02% H rapidly, Figure 18.<br />
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