Structural and Phase Mechanism and Rate of Interaction between TiCu, Ti₃Cu₄, and Ti₂Cu₃ Intermetallics and Hydrogen.
II. Destructive Hydrogenation of Intermetallics

Abstract

The structural and phase mechanism and the rate of TiCu, Ti₃Cu₄, and Ti₂Cu₃ destructive hydrogenation (DH) are studied at 773 K under hydrogen pressure of 1.0 MPa. The mechanism of destructive hydrogenation of the intermetallics consists in the formation of a hydrogen solid solution, the selective hydrogenation of titanium, and the subsequent formation of intermediate intermetallics and copper. The destructive hydrogenation products are nondestructive TiH1.9–Cu matrix composites. The rate of TiCu, Ti₃Cu₄, and Ti₂Cu₃ destructive hydrogenation is limited by the rates of hydrogen dissociation on the intermetallic surface and the diffusion of titanium hydride. The products of TiCu, Ti₃Cu₄, and Ti₂Cu₃ destructive hydrogenation are recombined in vacuum and hydrogen atmosphere.