Abstract
The protium absorbing/desorbing characteristics of the rapidly-solidified and mechanically-ground Mg 2 Ni-Mn alloys with different Manganese content were investigated. High Manganese additions do not result in great changes in plateau pressure of Mg 2 Ni phase. But in mechanically-ground specimens of Manganese-added alloys, a new plateau appears during absorption of protium at a pressure higher than the plateau pressure of Mg 2 Ni phase. In rapidly-solidified and mechanically-ground specimens of Manganese-added alloys, protium content at low temperature increases. By exposing specimens for many hours in argon atmosphere at room temperature after hydriding at 250°C, the desorbed protium content increases and the protium desorption temperature decreases. This implies that the amount of microtwinning decreases with increasing elapsed time, and then protium desorbing temperature changes to lower values. Formed MgH 2 phase in high Manganese-added alloys desorbs protium at low temperature probably due to contractive strain generated at the interface between the MgH 2 phase and intermingled Mg 2 NiH 4 phase as the later desorbs protium.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
