Properties of Ti3AlH6 and Ti3AlD6 systems at high pressure studied by synchrotron X-ray diffraction analysis

Compressibility of the Ti3AlH6 and Ti3AlD6 has been studied by X-ray diffraction method using advanced synchrotron technique up to 38 GPa. Significantly higher values of bulk modulus have been revealed for the hydride and deuteride compounds as compared to the initial pure intermetallic compound. The consequences of this observation have been discussed in terms of ductility and strength of obtained materials. Possible explanation of the peculiarity in the equation of states for both compounds is proposed on the base of the difference in repulsion interactions of hydrogen and deuterium species in the metallic lattice. All advantages of the hydrogenation of titanium aluminum compound have been summarized.