Hydrogenation of MgNi<SUB>2</SUB> by Atomic Hydrogen at Elevated Temperatures

Abstract

from the viewpoints of practical applications. The dissociation pressures of hydrides in Ni rich compositions are considered to be higher than those of Mg rich hydrides. Hence, it is important to explore Ni rich hydrides in Mg‐Ni‐H systems. In the present study, the hydrogenation of MgNi2 and the mixture of MgNi2 and Ni by atomic hydrogen was examined at elevated temperatures. Sintered powders of MgNi2 and the mixture of MgNi2 and Ni were hydrogenated at 573, 673 and 773 K by atomic hydrogen produced by rf-discharge, and changes in crystal structure were examined by using X-ray diffraction (XRD). 2. Experimental