HIGH-DISPERSED HYDRIDE PHASES IN RT_5 - NH_3 SYSTEMS, WHERE R = La, Sm; T = Ni, Co

摘要

The interaction of the intermetallic compounds RT_5 (R = La, Sm; T = Ni, Co) with ammonia was investigated at an initial pressure of ammonia of 0.6-0.7 MPa in the presence of 10 mass% (from the quantity of intermetallide entered in reaction) of NH_4Cl as a process activator. It was established, that depending on temperature of interaction in RT_5 ― NH_3 systems there are both the processes of hydrogenation with a formation of hydride phases of initial intermetallic compounds, and the processes of disproportionation with an isolation the hydride phases of new intermetallides. The reaction products are the high-dispersed powders.