Hydrogenation kinetics of aluminum under high pressure and high temperatures

Saito, Hiroyuki; Machida, Akihiko; Katayama, Yoshinori; Aoki, Katsutoshi

The hydrogenation reaction yield was estimated by recovery experiments at several hydrogenation conditions to clarify its kinetics. High-pressure experiments were performed using a cubic-anvil-type high-pressure apparatus. A pure aluminum samples were immersed in hydrogen fluid to form its hydride under high pressure and high temperature. After the high-pressure and high-temperature treatment, the samples were recovered at ambient conditions and were analyzed by optical microscope. The hydrogenation reaction yields were roughly estimated from the area ratio of AlH to the entire sample that appeared on optical micrograph.