Structure transformations during mechanical grinding of a Fe-TiH2 mixture

The nanostructured compound FeTiH was obtained by high-energy mechanical gr inding of a Fe-TiH2 mixture (at a 1 : 1 ratio) in an argon atmosphere. The structure and phase state of the mixture at various instants of grinding we re determined by X-ray powder diffraction and Mossbauer spectroscopy As a r esult of mechanical action on the mixture of iron with titanium hydride, hy drogen is evolved from the structure of titanium hydride and is actively in volved in phase formation by contributing to grinding and mutual diffusion of the elements. This leads to the formation of a fine-dispersed heterogene ous mixture whose ordering is most likely similar to that in the FeTiH phas e. The mixture contains also a disordered solid solution TiH2-x(Fe) formed on the basis of the initial TiH2.