Interrupted thermal desorption of TiH(2)

• Published in: Thermochimica acta Vol. 493; no. 1-2; pp. 80 - 84
• Main Authors: Borchers, Ch, Khomenko, T I, Leonov, A V, Morozova, O S
• Format: Journal Article
• Language: English
• Published: 01.09.2009
• ISSN: 0040-6031
• DOI: 10.1016/j.tca.2009.04.011

Structural changes of commercial TiH(2) were studied using interrupted temperature desorption spectroscopy and X-ray diffraction techniques to understand the mechanism of its degradation under non- equilibrium conditions. Rapid cooling on different stages of temperature-programmed heating allowed to study the intermediate phase compositions that evolve upon cooling from the high-temperature phase bTi(H). The phase transformation sequence is described as a number of consecutive reactions corresponding to the observed desorption peaks. Phases dTiH(2-x), gTiH, and the solid solution aTi(H) were found to be intermediates in the [var epsilon]TiH(2) -- > aTi transformation when the latter is interrupted. Additional evidence for the thermodynamic stability of gTiH is given.