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Pecularities of the shear modulus and deformation response in Al-H system

Spivak L., Łunarska E.

Advances in Materials Science

2007

Vol. 7, nr 1(11)

191-197

The change of the shear modulus of annealed and deformed Al due to the hydrogen ingress bas been shown to be stable at heating up to 1800 C and at ageing at RT. Hydrogen charging caused the active deformation of samples being under the creep condition, which continued even after the cessation of the hydrogen charging. The estimated activation volume of the hydrogen initiated creep depended on the mode of the initial deformation (elastic OT plastic). The obtained peculiar results cannot be fully explained and the formation of some transient stale preceding the hydride phase formation bas been supposed.

Modification of Catalytic Activity of Cu-Ti Amorphous Alloy Ribbons by Cathodic Hydrogen Charging

Pisarek M., Janik-Czachor M., Kędzierzawski P., Molnar A., Rac B., Szummer A.

Polish Journal of Chemistry

2004

Vol. 78 / nr 9

1379-1389

Since hydrogen is known to be one of the most efficient embrittling atomic species, cathodic hydrogen charging was used in an attempt to modify the structure, composition and morphology of Cu-Ti amorphous alloy ribbons. Various methods of analysis such as X-ray electron microanalysis, SEM, XRD and electrochemistry, with varying lateral resolution and different information depths, as well as catalytic tests, were used to follow the changes within the ribbons and at the surface, and their interrelations with catalytic activity. The activity in a test reaction (dehydrogenation of 2-propanol) was enhanced up to a conversion level of 66%, which is much higher than that obtained with all other pre-treatments previously applied.