Influence of the time of interaction of an alloy based on SmCo5 with low-pressure hydrogen on the phase composition

• Published in: Materials science (New York, N.Y.) N.Y.), 2012-11, Vol.48 (3), p.316-322
• Main Authors: Bulyk, I. І., Trostyanchyn, А. M., Lyutyi, P. Ya
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Materials Science; Solid Mechanics; Structural Materials
• ISSN: 1068-820X; 1573-885X
• DOI: 10.1007/s11003-012-9508-8

By the methods of differential thermal analysis and X-ray phase analysis, we have investigated the interaction of an alloy based on SmCO 5 with additives of the SmCO 3 phase under initial hydrogen pressures of 0.3, 0.4, 0.5, and 0.6 МРа at temperatures of 713 and 913 K with holding for 2 and 5 h. At 713 K, only the compound SmCO 3 interacts with hydrogen with the formation of unidentified phases. In holding at 913 K under a pressure of 0.3 and 0.4 МРа for τ = 2 and 5 h, the alloy partially disproportionates into samarium hydride and cobalt. It has been established that the complete disproportionation occurs in holding at pressures of 0.5 and 0.6 МРа and for τ = 2 and 5 h. In vacuum, at 1223 K, disproportionation products recombine in the initial phases.