Characteristics of hydrogen absorption by zirconium and titanium

Hydrogen absorption experiments were carried out using the zirconium (Zr) and titanium (Ti) in the form of a metal sponge, strip and rod to investigate the characteristics of hydrogen absorption The Zr and Ti sponges showed a high hydrogen absorption capacity inspite of a low reaction temperature. The H/M, which indicates the capacity of hydrogen absorption, was measured at 20 for the Zr ansi Ti sponges under experiment;tl condition of 25 degreesC. However, in the case of the Zr and Ti strip and rod, the hydrogen absorption capacity was very low at 25 degreesC But, the capacity of hydrogen absorption increased with an increase in the reaction temperature. When the Ti strip was not activated, the H/M ratio was measured at 0.58. But, when the Ti strip was once and twice activated at 800 degreesC for 1 h, the H/M ratio increased to 1.6 and 1.83, respectively. A pulverizing phenomenon during the metal hydriding was observed in both the Zr/Ti strip and the Zr/Ti rod. However, this pulverizing phenomenon was not observed in the Zr and Ti sponges because of their high surface area.