Conferences

Effect of Gas Media on Interaction between Products of Intermetallide Destructive Hydrogenation

T.Bratanich,
 
T.Bratanich
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2011, #01/02
http://www.materials.kiev.ua/article/1379

Abstract

The thermodynamic possibility for interaction between the products of LaNi5, TiFe, Ti2Ni, TiNi, Ti2Cu, TiCu, Ti3Al, TiAl, Mg2Ni, Mg2Cu and ZrMn2,8 destructive hydrogenation and for their interaction with gases (nitrogen, ammonia, methane, water vapor, carbon dioxide and oxide) is investigated. The recombination of the intermetallides from hydride phases and metals is thermodynamically favored over the temperature range suitable for reversible hydrogen accumulation. The minimum tem-perature for the recombination of intermetallides in hydrogen atmosphere is directly proportional to the titanium content of the intermetallide and products of its destructive hydrogenation. The recombination of Ti3Al proceeds in hydrogen at 1.0 MPa and 1073 K from the products of its destructive hydrogenation. The thermo-dynamic possibility for the transformation of interacting products of destructive hydrogenation of titanium-based intermetallides into noninteracting ones by substitution of titanium hydride by its nitride, carbide, or oxide during interaction with nitrogen or ammonia, with methane or carbon, and with CO2, CO or H2O is proved. Thermally stable composite TiH2–TiN–Ti3Al–TiAl is obtained by annealing of the products of Ti3Aldestructive hydrogenation (TiHx–Ti3Al–TiAl2–TiAl) in nitrogen at 2.0 MPa and 1073 K.


RECOMBINATION OF INTERMETALLIDES IN HYDROGEN, THERMALLY STABLE NANOCOMPOSITE