Crystal structure of the tetragonal ɛ-phase deuteride of Ti–15at%Mo alloy determined by neutron diffraction
作者:X. Xu、E. Wu、K. Sun
DOI:10.1016/j.jallcom.2009.05.092
日期:2009.10
The crystal structure of the deuteride of Ti0.85Mo0.15 alloy Ti0.85Mo0.15D1.47 is determined by neutron powder diffraction to be a tetragonally distorted fluorite-type structure similar to that of epsilon-phase in Ti-H system. The D concentration and c/a axial ratio of this phase are significantly lower than that in the Ti-H system. The formation of epsilon-phase in the Ti-Mo-H system supports the hypothesis that the electron density change play a role in the delta-epsilon phase transition. Considerable broadening of the reflections is observed in the diffraction patterns. and attributed to the D concentration inhomogeneity and anisotropic microstrain in the lattice of the deuteride. (C) 2009 Elsevier B.V All rights reserved.