Abstract
Neutron diffraction and X-ray diffraction were applied to study the ordering in the TiN0.26H0.15, TiN0.26D0.15 and TiN0.26H0.075D0.075 solid solutions. Hydrogen atoms are found to redistribute over octahedral and tetrahedral interstices of the hcp-structure of the TiN0.26H0.15 solid solution with varying temperature. Consecutive ordering-decay processes and the ordering of antiphase domains are discovered at temperatures below the decay temperature. In a high-temperature disordered state, isotopically different solid solutions TiN0.26H0.15, TiN0.26D0.15 have identical structural characteristics; as temperature decreases, an isotopic effect comes into operation. This effect consists of the following: as opposed to the hydrogen solid solution, in the deuterium solid solution ordering starts at a far higher temperature; an ordered monoclinic phase has a larger homogeneous region; interstitial 2D and 1H distribution over interstices is different in character; and the blocking effect between interstitial atoms is more pronounced. The displacement of hydrogen atoms from the center of the tetrahedron along the c axis has different signs in the disordered and ordered solid solutions.
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KHIDIROV, I., PADURETS, L., ZAGINAICHENKO, S.Y., SULTANOVA, S.K. (2007). ISOTOPIC EFFECT IN HYDROGEN AND NITROGEN SOLID SOLUTIONS IN α -Ti. In: Veziroglu, T.N., et al. Hydrogen Materials Science and Chemistry of Carbon Nanomaterials. NATO Security through Science Series A: Chemistry and Biology. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5514-0_7
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DOI: https://doi.org/10.1007/978-1-4020-5514-0_7
Publisher Name: Springer, Dordrecht
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